6D0-9-17 Hyoshi 6/7/07 1:28 PM ページ 1 Z300 LZ300 OWNER’S MANUAL U.S.A.
6D0-9-17 Hyoshi 6/7/07 1:28 PM ページ 2 EMU25072 ZMU01690 Read this owner’s manual carefully before operating or working on your outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.
Important manual information EMU31281 To the owner Thank you for choosing a Yamaha outboard motor. This Owner’s Manual contains information needed for proper operation, maintenance and care. A thorough understanding of these simple instructions will help you obtain maximum enjoyment from your new Yamaha. If you have any question about the operation or maintenance of your outboard motor, please consult a Yamaha dealer.
Table of contents General information .......................... 1 Identification numbers record.......... 1 Outboard motor serial number .......... 1 Key number....................................... 1 Emission control information ........... 1 North American models..................... 1 Star labels ......................................... 2 Important labels............................... 3 Warning labels .................................. 3 Caution labels ...................................
Table of contents Low battery voltage-warning indicator ........................................ 29 Fuel management meter ................. 29 Fuel flow meter................................ 29 Fuel consumption meter ................. 30 Fuel economy ................................. 30 Twin-engine speed synchronizer .... 31 Command link multifunction meters........................................... 31 Tachometer unit .............................. 32 Speed & fuel meter unit ..................
Table of contents Changing gear oil ............................ 74 Inspecting and replacing anode(s)........................................ 76 Checking battery (for electric start models) ......................................... 76 Connecting the Battery ................... 77 Disconnecting the battery ............... 78 Checking top cowling ...................... 78 Coating the boat bottom.................. 78 Trouble Recovery ............................ 79 Troubleshooting ............................
General information EMU25171 Identification numbers record EMU25183 Outboard motor serial number The outboard motor serial number is stamped on the label attached to the port side of the clamp bracket. Record your outboard motor serial number in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in case your outboard motor is stolen. 1. Key number EMU25221 Emission control information 1 EMU25230 North American models ZMU01854 1.
General information particular label. 1 ZMU05945 ZMU04932 EMU25262 Manufactured date label This label is attached to the clamp bracket or the swivel bracket. 1 1. Star labels location EMU25280 One Star—Low Emission The one-star label identifies engines that meet the Air Resources Board’s 2001 exhaust emission standards. Engines meeting these standards have 75% lower emissions than conventional carbureted two-stroke engines. These engines are equivalent to the U.S.
General information ZMU01703 EMU25300 ZMU05663 EMU25382 Three Stars—Ultra Low Emission The three-star label identifies engines that meet the Air Resources Board’s 2008 exhaust emission standards. Engines meeting these standards have 65% lower emissions than One Star-Low-Emission engines.
General information ● when starting or during operation. Keep hands, hair, and clothes away from flywheel and other rotating parts while engine is running. EMU25413 Label (counter rotation models) EWM01281 WARNING Use only a counterclockwise rotation propeller with this engine. Counterclockwise propellers are marked with a letter “L” after the size indication. The wrong type of propeller could cause the boat to go in an unexpected direction, which could lead to an accident.
Safety information EMU33621 Safety information Severe injury could occur if the outboard motor accidentally falls. Observe these precautions at all times. EMU33670 EMU33630 Engine shut-off cord Rotating parts Hands, feet, hair, jewelry, clothing, PFD straps, etc. can become entangled with internal rotating parts of the engine, resulting in serious injury or death. Keep the top cowling in place whenever possible. Do not remove or replace the cowling with the engine running.
Safety information EMU33900 Carbon monoxide This product emits exhaust gases which contain carbon monoxide, a colorless, odorless gas which may cause brain damage or death when inhaled. Symptoms include nausea, dizziness, and drowsiness. Keep cockpit and cabin areas well ventilated. Avoid blocking exhaust outlets. EMU33780 Modifications Do not attempt to modify this outboard motor. Modifications to your outboard motor may reduce safety and reliability, and render the outboard unsafe or illegal to use.
Safety information ● ● ● ● Avoid sharp turns or other maneuvers that make it hard for others to avoid you or understand where you are going. Avoid areas with submerged objects or shallow water. Ride within your limits and avoid aggressive maneuvers to reduce the risk of loss of control, ejection, and collision. Take early action to avoid collisions. Remember, boats do not have brakes, and stopping the engine or reducing throttle can reduce the ability to steer.
Safety information trators, or your local Power Squadron for a complete set of rules governing the waters in which you will be using your boat. EMU33680 Boating organizations The following organizations provide boating safety training and information about boating safety and laws. United States Coast Guard Consumer Affairs Staff (G-BC) Office of Boating, Public, and Consumer Affairs U.S. Coast Guard Headquarters Washington, D.C. 20593-0001 Boating Safety Hotline: 1-800-368-5647 www.uscgboating.
Safety information vessel. Normally, you should not cross in front of the vessel with the right-of-way. You should slow down or change directions briefly and pass behind the other vessel. You should always move in such a way that the operator of the other vessel can see what you are doing.
Safety information Overtaking If you are passing another vessel, you are the “Give-Way” vessel. This means that the other vessel is expected to maintain its course and speed. You must stay out of its way until you are clear of it. Likewise, if another vessel is passing you, you should maintain your speed and direction so that the other vessel can steer itself around you. EMU25531 Other special situations There are three other rules you should be aware of when driving your boat around other vessels.
Safety information This system uses buoys and signs with distinctive shapes and colors to show regulatory or advisory information. These markers are white with black letters and orange boarders. They signify speed zones, restricted areas, danger areas, and general information. Remember, markings may vary by geographic location. Always consult local boating authorities before driving your boat in unfamiliar waters.
Safety information ZMU01708 12
Basic requirements EMU25540 Fueling instructions EWM00010 WARNING GASOLINE AND ITS VAPORS ARE HIGHLY FLAMMABLE AND EXPLOSIVE! ● Do not smoke when refueling, and keep away from sparks, flames, or other sources of ignition. ● Stop engine before refueling. ● Refuel in a well-ventilated area. Refuel portable fuel tanks off the boat. ● Take care not to spill gasoline. If gasoline spills, wipe it up immediately with dry rags. ● Do not overfill the fuel tank. ● Tighten the filler cap securely after refueling.
Basic requirements EMU33552 Installation requirements EMU33560 Boat horsepower rating Before installing the outboard motor(s), confirm that the total horsepower of your motor(s) does not exceed the boats maximum horsepower rating. See the boats capacity plate or contact the manufacturer. EWM01560 WARNING Overpowering a boat can cause severe instability.
Basic requirements every application. Your outboard motor came with a Yamaha propeller chosen to perform well over a range of applications, but there may be uses where a different propeller would be more appropriate. Your Yamaha dealer can help you select the right propeller for your boating needs. Select a propeller that will allow the engine to reach the middle or upper half of the operating range at full throttle with the maximum boatload.
Basic components EMU2579D Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all models. Z300, LZ300 1 11 13 12 10 2 14 15 17 18 16 2 9 8 YAMAHA 19 YAMAHA FUEL MANAGEMENT SPEED Km/h knot mph 7 TIME set 6 5 3 20 4 1. Top cowling 2. Top cowling lock lever(s) 3. Trim tab (anode) 4. Propeller* 5. Cooling water inlet 6. Anti-cavitation plate 7. Anode 8. Clamp bracket 9. Tilt support lever 10. Flushing device 11. Water separator 12.
Basic components 1 2 3 4 5 6 ZMU05429 1. Tachometer unit (Square type)* 2. Tachometer unit (Round type)* 3. Speedometer unit (Square type)* 4. Speed & fuel meter unit (Square type)* 5. Speed & fuel meter unit (Round type)* 6. Fuel management meter (Square type)* EMU26180 Remote control The remote control lever actuates both the shifter and the throttle. The electrical switches are mounted on the remote control box. 1. Power trim and tilt switch 2. Remote control lever 3.
Basic components 1 F 2 2 4 6 4 N 1 5 7 3 7 ZMU04569 EMU26190 Remote control lever Moving the lever forward from the neutral position engages forward gear. Pulling the lever back from neutral engages reverse. The engine will continue to run at idle until the lever is moved about 35° (a detent can be felt). Moving the lever farther opens the throttle, and the engine will begin to accelerate. 6 5 2 1. Remote control lever 2. Power trim and tilt switch 3. Free accelerator 4.
Basic components NOTE: The neutral throttle lever will operate only when the remote control lever is in neutral. The remote control lever will operate only when the neutral throttle lever is in the closed position. ● ● used when the remote control lever is in the neutral position. After the button is pushed, the throttle begins to open after the remote control lever is moved at least 35°. After using the free accelerator, return the remote control lever to the neutral position.
Basic components moved. ZMU04646 When constant speed is desired, tighten the adjuster to maintain the desired throttle setting. EMU25991 1. Cord 2. Clip Engine shut-off switch The clip must be attached to the engine shutoff switch for the engine to run. The cord should be attached to a secure place on the operator’s clothing, or arm or leg. Should the operator fall overboard or leave the helm, the cord will pull out the clip, stopping ignition to the engine.
Basic components sition, the starter motor turns to start the engine. When the key is released, it returns automatically to the “ ” (on) position. EMU26152 Power trim and tilt switch on bottom engine cowling OFF ON START OFF The power trim and tilt switch is located on the side of the bottom engine cowling. Pressing the switch “ ” (up) trims the outboard motor up, and then tilts it up. Pressing the switch “ ” (down) tilts the outboard motor down and trims it down.
Basic components ● For instructions on using the power trim and tilt switches, see pages 53 and 55. EMU26243 UP Trim tab with anode The trim tab should be adjusted so that the steering control can be turned to either the right or left by applying the same amount of force. DN EWM00840 ZMU01862 NOTE: For instructions on using the power trim and tilt switch, see page 55.
Basic components clamp bracket. ZMU01864 ECM00660 CAUTION: Do not use the tilt support lever or knob when trailering the boat. The outboard motor could shake loose from the tilt support and fall. If the motor cannot be trailered in the normal running position, use an additional support device to secure it in the tilt position. 1. Trim tab 2. Bolt 3. Cap EMU26382 Top cowling lock lever (pull up type) To remove the engine top cowling, pull up the lock lever(s) and lift off the cowling.
Basic components 1 1 ZMU05499 ZMU04934 NOTE: Activation of warning device ● The water separator-warning indicator of Command Link Tachometer will blink. ● The buzzer will sound intermittently only when the gear shift is in neutral. ● If the warning system has activated, stop the engine and consult a Yamaha dealer immediately. For details on usage, see page 63. NOTE: 1.
Basic components indicators, see page 47. 2. Oil level indicator ECM00030 CAUTION: EMU26492 Digital tachometer The tachometer shows the engine speed and has the following functions. Do not operate the engine without oil. Serious engine damage will occur. NOTE: All segments of the display will light momentarily after the main switch is turned on and will return to normal thereafter. 1 1 2 3 ZMU04580 1. Oil level indicators 5 6 4 7 ZMU03601 1. Tachometer 2. Trim meter 3. Hour meter 4.
Basic components EMU26582 Overheat-warning indicator (digital type) If the engine temperature rises too high, the warning indicator will start to blink. For further information on reading the indicator, see page 38. NOTE: After the main switch is first turned on, all segments of the display come on as a test. After a few seconds, the gauge will change to normal operation. Watch the gauge when turning on the main switch to make sure all segments come on.
Basic components engine has been run. It can be set to show the total number of hours or the number of hours for the current trip. The display can also be turned on and off. ZMU04581 NOTE: Memorize the trim angles that work best for your boat under different conditions. Adjust the trim angle to the desired setting with the power trim and tilt switch. ZMU01870 ● ● EMU26620 Trim meter (digital type) This meter shows the trim angle of your outboard motor.
Basic components NOTE: The clock operates on battery power. Disconnecting the battery will stop the clock. Reset the clock after connecting the battery. EMU26711 Fuel gauge Eight segments indicate the fuel level. When all segments are showing, the fuel tank is full. ECM00860 NOTE: ● ● The trip distance is shown in kilometers or miles depending upon the unit of measurement selected for the speedometer. The trip distance is kept in memory by battery power.
Basic components blink. ECM00880 CAUTION: Do not continue to operate the engine with full throttle if a warning device has activated. Get back to the port within trolling engine speed. EMU26740 Fuel management meter The fuel management meter shows the state of the fuel consumption while the engine is running. 1 3 2 ZMU01748 1. Fuel level warning segment 1. Fuel flow meter 2. Fuel consumption meter / Fuel economy meter / Twin engine speed synchronizer 3.
Basic components displays “ ” (for port and starboard). ● The fuel consumption meter and fuel economy meter will indicate the same unit of measurement. EMU26760 Fuel consumption meter ZMU01749 Use the “ ” (set) button to rotate the fuel flow display in the following order: ” (set) button once to display ● Press the “ the fuel flow of the starboard engine. An “ ” (for starboard) will also be displayed. ” (set) button a second time ● Press the “ to display the fuel flow of the port engine.
Basic components NOTE: If twin engines are installed on your boat, the gauge will only display the total fuel economy of both engines. until the indicator on the face of the gauge points to “ ” (synchronizer). NOTE: ● ● ● Fuel consumption varies greatly with boat design, weight, propeller used, engine trim angle, sea conditions (including wind), and throttle position.
Basic components ly different between the round and square types. Check the model and type of your unit carefully. This manual describes mainly the warning indicators. For more details on setting meters or changing indicator systems, see the attached operation manual. EMU32520 Tachometer unit The tachometer shows the engine revolutions per minute.
Basic components 1 The engine speed will automatically decrease to about 2000 r/min. 4 5 2 3 6 7 8 9 ZMU05453 1. Tachometer 2. Trim meter 3. Multifunction display 4. Water detection warning indicator 5. Engine trouble warning/maintenance indicator 6. Cooling water pressure 7. Oil level (2-stroke models) 8. Cooling water/engine temperature 9.
Basic components Yamaha dealer immediately. ZMU05421 ZMU05423 ZMU05422 ZMU05424 Stop the engine immediately if the buzzer sounds and the overheat warning device has activated. Check the cooling water inlet for clogging. ECM01591 CAUTION: ● ● Do not continue to run the engine if the overheat-warning indicator blinks. Serious engine damage will occur. Do not continue to operate the engine if a warning device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected.
Basic components ZMU05426 ECM00920 ZMU05428 EMU31610 CAUTION: Speed & fuel meter unit In such an event, the engine will not operate properly. Consult a Yamaha dealer immediately. This unit shows the boat speed and has the functions of fuel meter, total fuel consumption display, fuel economy display, fuel flow display, and system voltage display. If optional sensors are connected to the unit, trip display, water surface temperature display, depth display, and clock will be available.
Basic components NOTE: 1 After the main switch is first turned on, all the displays come on as a test. After a few seconds, the gauge will change to normal operation. 3 2 ZMU05433 1. Speedometer 2. Fuel meter 3. Multifunction display NOTE: The speed & fuel meter unit shows various kinds of information according to the setting made with the “ ” (set) and “ ” (mode) buttons. For details, see the attached operation manual.
Basic components 1 3 2 2 1 ZMU05437 1. Speedometer 2. Fuel meter 3. Multifunction display ZMU05438 1. Set button 2. Mode button 1 NOTE: After the main switch is first turned on, all the displays come on as a test. After a few seconds, the gauge will change to normal operation. 2 NOTE: The speedometer unit shows various kinds of information according to the setting made using the “ ” (set) and “ ” (mode) buttons.
Basic components EMU26801 Warning system ECM00090 CAUTION: Do not continue to operate the engine if a warning device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected. EMU26825 Overheat warning This engine has the overheat warning device. If the engine temperature rises too high, the warning device will activate. Activation of warning device ● The engine speed will automatically decrease to about 2000 r/min.
Basic components on the engine not affected by overheating, turn off the main switch of the engine overheating. EMU26847 Oil level warning and oil filter clogging warning Oil injection models This engine has an oil level warning system. If the oil level falls below the lower limit, the warning system will activate. Activation of warning device ● Engine speed will automatically decrease to about 2000 r/min. ● The oil level-warning indicator will light or blink.
Basic components 1 1.
Operation EMU26902 Installation The information presented in this section is intended as reference only. It is not possible to provide complete instructions for every possible boat and motor combination. Proper mounting depends in part on experience and the specific boat and motor combination. EWM01590 1 WARNING ● ● Overpowering a boat could cause severe instability. Do not install an outboard motor with more horsepower than the maximum rating on the capacity plate of the boat.
Operation motor is affected by the boat/motor combination and the desired use. Test runs at different heights can help determine the optimum mounting height. Consult your Yamaha dealer or boat manufacturer for further information on determining the proper mounting height. EMU27041 Breaking in engine Your new engine requires a period of breakin to allow mating surfaces of moving parts to wear in evenly. Correct break-in will help ensure proper performance and longer engine life.
Operation 4. 5. quarter throttle or less to let the engine cool. Remaining seven hours: Run the engine at any speed. However, avoid operating at full throttle for more than 5 minutes at a time. After the first 10 hours: Operate the engine normally. EMU27104 Pre-operation checks EWM00081 WARNING If any item in the pre-operation check is not working properly, have it inspected and repaired before operating the outboard motor. Otherwise an accident could occur.
Operation indicator blinks, consult your Yamaha dealer immediately. ● EMU27120 Oil ● Check to be sure you have plenty of oil for your trip. 2. EMU27130 Controls ● ● ● ● Check throttle, shift, and steering for proper operation before starting the engine. The controls should work smoothly, without binding or unusual free play. Look for loose or damaged connections. Check operation of the starter and stop switches when the outboard motor is in the water.
Operation ZMU01876 EMU27233 Filling fuel and engine oil EMU30320 Filling fuel for models without a fuel joint EWM00060 WARNING Gasoline and its vapors are highly flammable and explosive. Keep away from sparks, cigarettes, flames, or other sources of ignition. 1. 2. 3. Remove the fuel tank cap. Carefully fill the fuel tank. Securely close the cap after filling the tank. Wipe up any spilled fuel.
Operation ZMU01877 NOTE: The oil level lines on the remote oil tank indicate the amount of additional oil that can be added to the tank. The top oil level line indicates approximately 1.9 L (0.5 US gal, 0.4 Imp gal) can be added, and the bottom oil level line indicates approximately 3.8 L (1 US gal, 0.8 Imp gal) can be added. 2. 3. Turn on the main switch. The Yamaha oil injection system will automatically feed oil from the remote oil tank to the engine oil tank. Operate the engine normally.
Operation EMU27321 Oil level indicator operation The various functions of the oil level system are as follows: EMU27382 Oil level indicator Electric start models Oil levelwarning indicator (digital tachometer) Oil level-warning indicator (analog tachometer) Green Engine oil tank more than 300 more than cm3 (0.32 US qt, 0.26 Imp qt) 1500 cm3 (1.6 US qt, 1.31 Imp qt) more than 300 Yellow Red–Yellow– Green Remote oil tank cm3 (0.32 US qt, 0.26 Imp qt) 300 cm3 (0.32 US qt, 0.
Operation EMU27450 Operating engine EMU27482 Feeding fuel EWM00420 WARNING ● ● ● Before starting the engine, make sure that the boat is tightly moored and that you can steer clear of any obstructions. Be sure there are no swimmers in the water near you. When the air vent screw is loosened, gasoline vapor will be released. Gasoline is highly flammable, and its vapors are flammable and explosive. Refrain from smoking, and keep away from open flames and sparks while loosening the air vent screw.
Operation N OFF ON START OFF ZMU04588 2. Attach the engine shut-off cord to a secure place on your clothing, or your arm or leg. Then install the clip on the other end of the cord into the engine shut-off switch. EWM00121 WARNING ● ● ● ON START ZMU04589 3. Turn the main switch to “ ” (on). NOTE: Dual engine users: When the main switch is turned on, the buzzer operates for a few seconds then stops automatically. The buzzer also operates if one of the engines stalls.
Operation (on). ECM00191 CAUTION: ● ● 2. Never turn the main switch to “ ” (start) while the engine is running. Do not keep the starter motor turning for more than 5 seconds. If the starter motor is turned continuously for more than 5 seconds, the battery will be quickly discharged, thus making it impossible to start the engine. The starter can also be damaged. If the engine will not start after 5 seconds of cranking, return the main switch to “ ” (on), wait 10 seconds, then crank the engine again.
Operation idle speed can prevent you from shifting back to neutral. If this occurs, stop the engine, shift to neutral, then restart the engine and allow it to warm up. To shift out of neutral 1. Pull the neutral interlock trigger up (if equipped). To shift from in gear (forward/reverse) to neutral 1. Close the throttle so that the engine slows to idle speed. 1. Neutral interlock trigger 2.
Operation wind direction. EMU27820 Stopping engine Before stopping the engine, first let it cool off for a few minutes at idle or low speed. Stopping the engine immediately after operating at high speed is not recommended. EMU27853 Procedure 1. Turn the main switch to “ ” (off).
Operation switch to “ ” (off). EMU27861 Trimming outboard motor The trim angle of the outboard motor helps determine the position of the bow of the boat in the water. Correct trim angle will help improve performance and fuel economy while reducing strain on the engine. Correct trim angle depends upon the combination of boat, engine, and propeller. Correct trim is also affected by variables such as the load in the boat, sea conditions, and running speed.
Operation not adjust the trim angle with this switch while the boat is moving. Adjust the outboard motor trim angle using the power trim and tilt switch. To raise the bow (trim-out), press the switch “ ” (up). To lower the bow (trim-in), press the switch “ ” (down). Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions.
Operation duce salt corrosion. EWM00221 WARNING Be sure all people are clear of the outboard motor when tilting up and down, Body parts can be crushed between the motor and the clamp bracket when the motor is trimmed or tilted. EWM00250 WARNING Bow Down Too much trim-in causes the boat to “plow” through the water, decreasing fuel economy and making it hard to increase speed. Operating with excessive trim-in at higher speeds also makes the boat unstable.
Operation N UP ZMU04588 2. Press the power trim and tilt switch “ ” (up) until the outboard motor has tilted up completely. ZMU01954 3. Pull the tilt support lever toward you to support the engine. ZMU01886 EWM00261 WARNING After tilting the outboard motor, be sure to support it with the tilt support knob or tilt support lever. Otherwise the outboard motor could fall back down suddenly if oil in the power trim and tilt unit or in the power tilt unit loses pressure.
Operation 4. Models equipped with trim rods: Once the outboard motor is supported with the tilt support lever, press the power trim and tilt switch “ ” (down) to retract the trim rods. 3. Push the power trim and tilt switch “ ” (down) to lower the outboard motor to the desired position. ECM00250 CAUTION: DN Be sure to retract the trim rods completely during mooring. This protects the rods from marine growth and corrosion which could damage the power trim and tilt mechanism.
Operation to allow operation in shallow water. desired position using the power trim and tilt switch. EWM00660 WARNING ● ● Place the gear shift in neutral before setting up for shallow water cruising. Return the outboard motor to its normal position as soon as the boat is back in deeper water. UP UP DN ECM00260 CAUTION: Do not tilt the outboard motor up so that the cooling water inlet on the lower unit is above the surface of the water when setting up for and cruising in shallow water.
Operation them from becoming clogged. Also rinse the outside of the outboard motor with fresh water and, if possible, rinse the power head under the cowling. Cruising in muddy or turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (available for V4 and large engines) if you use the outboard motor in water with a lot of sediment in it, such as muddy or other turbid (cloudy) water. Cruising in acidic water Water in some areas can be acidic.
Maintenance EMU31480 Specifications NOTE: “(AL)” stated in the specification data below represents the numerical value for the aluminum propeller installed. Likewise, “(SUS)” represents the value for stainless steel propeller installed and “(PL)” for plastic propeller installed. EMU28219 Dimension: Overall length: 868 mm (34.2 in) Overall width: 568 mm (22.4 in) Overall height X: 1830 mm (72.0 in) Overall height U: 1957 mm (77.0 in) Transom height X: 641 mm (25.2 in) Transom height U: 768 mm (30.
Maintenance Oil injection Engine oil tank capacity: 1.2 L (1.27 US qt) (1.06 Imp.qt) Remote oil tank capacity: 10.5 L (11.10 US qt) (9.24 Imp.qt) Recommended gear oil: Hypoid gear oil SAE#90 Gear oil quantity: LZ300TR 803.0 cm3 (27.15 US oz) (28.32 Imp.oz) Z300TR 918.0 cm3 (31.04 US oz) (32.38 Imp.oz) Tightening torque for engine: Spark plug: 25.0 Nm (18.4 ft-lb) (2.55 kgf-m) Propeller nut: 55.0 Nm (40.6 ft-lb) (5.61 kgf-m) EMU28223 motor accidentally falls.
Maintenance tools, can perform the following procedures. ECM01070 EMU31390 Washing the outboard motor CAUTION: NOTE: Do not use any chemical goods containing Silicon, Phosphorus, or Lead. Otherwise the oxygen sensor for the Electronic Fuel Injection system could be damaged. Consult your Yamaha dealer for details on the use of chemical goods for storage. This procedure is performed while the top cowling is installed. 1. 2. Wash the outboard motor body using fresh water.
Maintenance “Yamaha Silicone Protectant”. ECM01401 CAUTION: Do not spray when the engine is running. Also, do not spray near the silencer or into the engine. Otherwise the engine could be damaged. 3. Wax the cowling with a non-abrasive wax such as “Yamaha Silicone Wax”. EMU28431 Battery care EWM00330 WARNING Battery electrolytic fluid is dangerous; it contains sulfuric acid and therefore is poisonous and highly caustic.
Maintenance tion. Water will leak out of the connector instead of cooling the engine, which can cause serious overheating. Be sure the connector is tightened securely on the fitting after flushing the engine. 1 2 3 NOTE: ● ● When flushing the engine with the boat in the water, tilting up the outboard motor until it is completely out of the water will achieve better results. For cooling system flushing instructions, see page 61.
Maintenance EMU28488 Periodic maintenance EWM01071 WARNING Be sure to turn off the engine when you perform maintenance unless otherwise specified. If you are not familiar with machine servicing, this work should be done by your Yamaha dealer or other qualified mechanic. Maintenance, replacement, or repair of the emission control devices and systems may be performed by any marine engine repair establishment or individual.
Maintenance EMU28522 Maintenance chart Frequency of maintenance operations may be adjusted according to the operating conditions, but the following table gives general guidelines. Refer to the sections in this chapter for explanations of each owner-specific action. NOTE: When operating in salt water, turbid or muddy water, the engine should be flushed with clean water after each use. The “ The “ ” symbol indicates the check-ups which you may carry out yourself.
Maintenance Initial Item Water pump High pressure fuel pump drive belt High pressure fuel pump oil level Actions 10 hours (1 month) Every 50 hours (3 months) 100 hours (6 months) 200 hours (1 year) Inspection / replacement Inspection / replacement Inspection / filling Oil pump Inspection / adjustment Oil tank water drain Inspection / cleaning Spark plug(s) Cleaning / adjustment / replacement EMU28874 Maintenance chart (additional) Every Item Actions 500 hours (2.
Maintenance EMU28932 Greasing Yamaha marine grease (Water resistant grease) Z300, LZ300 ZMU01939 EMU28953 Cleaning and adjusting spark plug sparks, which could lead to explosion or fire. EWM00560 WARNING When removing or installing a spark plug, be careful not to damage the insulator. A damaged insulator could allow external 68 EWM01550 WARNING The engine will still be very hot when it has just been turned off.
Maintenance care so that neither you nor anyone else gets burnt. To avoid burns, work on the engine when it has cooled down. The spark plug is an important engine component and is easy to inspect. The condition of the spark plug can indicate something about the condition of the engine. For example, if the center electrode porcelain is very white, this could indicate an intake air leak or carburetion problem in that cylinder. Do not attempt to diagnose any problems yourself.
Maintenance ● ● ● Fuel line joint leakage Fuel line cracks or other damage Fuel connector leakage EMU29041 Inspecting idling speed EWM00451 WARNING ● ● Do not touch or remove electrical parts when starting or during operation. Keep hands, hair, and clothes away from the flywheel and other rotating parts while the engine is running. ECM00490 CAUTION: This procedure must be performed while the outboard motor is in the water. A flushing attachment or test tank can be used.
Maintenance EMU29050 EMU29130 Checking water in engine oil tank Water leakage Oil injection models There is a water trap at the bottom of the engine oil tank. If water or foreign matter is visible in this trap, consult your Yamaha dealer. Start the engine and check that no water leaks from the joints between the exhaust cover, cylinder head, and body cylinder. EMU29154 Checking power trim and tilt system EWM00431 WARNING ● 2 1 ● ZMU01895 1. Water trap 2. Engine oil tank 1.
Maintenance 4. Use the tilt support lever to lock the motor in the up position. Operate the tilt down switch briefly so the motor is supported by the tilt support lever. 1 ZMU04936 8. ZMU04935 Tilt the outboard motor down. Check that the tilt rod and trim rods operate smoothly. NOTE: 1. Tilt support lever 5. 6. Consult your Yamaha dealer if any operation is abnormal. Check that the tilt rod and trim rods are free of corrosion or other flaws.
Maintenance EMU30661 Removing propeller EMU29196 Spline models 1. Straighten the cotter pin and pull it out using a pair of pliers. 2. Remove the propeller nut, washer, and spacer (if equipped). 1 ZMU01896 4 6 3 2 5 ZMU01898 ZMU01897 Checkpoints Check each of the propeller blades for wear, erosion from cavitation or ventilation, or other damage. ● Check the propeller shaft for damage. ● Check the splines for wear or damage. ● Check for fish line tangled around the propeller shaft. ● 1.
Maintenance from that expected. ECM00340 EMU31910 Changing gear oil EWM00800 CAUTION: ● ● Be sure to install the thrust washer before installing the propeller, otherwise the lower case and propeller boss could be damaged. Be sure to use a new cotter pin and bend the ends over securely. Otherwise the propeller could come off during operation and be lost. 1. 2. 3. Apply Yamaha marine grease or a corrosion resistant grease to the propeller shaft.
Maintenance Yamaha dealer. 6. With the outboard motor in a vertical position, and using a flexible or pressurized filling device, inject the gear oil into the gear oil drain screw hole. Recommended gear oil: Hypoid gear oil SAE#90 Gear oil quantity: LZ300TR 803.0 cm3 (27.15 US oz) (28.32 Imp.oz) Z300TR 918.0 cm3 (31.04 US oz) (32.38 Imp.oz) 1. Gear oil drain screw 2. Oil level plug 3. Gasket NOTE: ● ● 5.
Maintenance EMU29312 EMU29320 Inspecting and replacing anode(s) Checking battery (for electric start models) Yamaha outboard motors are protected from corrosion by sacrificial anodes. Inspect the external anodes periodically. Remove scales from the surfaces of the anodes. Consult a Yamaha dealer for replacement of external anodes. ECM00720 CAUTION: Do not paint anodes, as this would render them ineffective. NOTE: Inspect ground leads attached to external anodes on equipped models.
Maintenance ● 1. deteriorate. Ordinary tap water contains minerals harmful to a battery, and should not be used for topping up. Check the electrolyte level at least once a month. Fill to the manufacturer’s recommended level when necessary. Top up only with distilled water (or pure deionized water suitable to use in batteries). tion in the boat. Install a fully charged battery in the holder.
Maintenance between the (-) terminals of the starting battery and accessory battery. See the illustrations of the wiring connections. This cable must be made from wire thicker than the starting battery cable. EWM00600 properly fitting cover could allow water into the engine. Check the fitting of the top cowling by pushing it with both hands. If it is loose have it repaired by your Yamaha dealer. WARNING Use of smaller wire could lead to a fire. 7 3 4 5 2 ZMU04679 1 EMU29400 6 ZMU01942 1.
Trouble Recovery EMU29425 Troubleshooting A problem in the fuel, compression, or ignition systems can cause poor starting, loss of power, or other problems. This section describes basic checks and possible remedies, and covers all Yamaha outboard motors. Therefore some items may not apply to your model. If your outboard motor requires repair, bring it to your Yamaha dealer. If the engine trouble-warning indicator is flashing, consult your Yamaha dealer. Starter will not operate. Q.
Trouble Recovery A. Check for pinched or kinked fuel line or other obstructions in fuel system. Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel. Q. Is fuel filter clogged? A. Clean or replace filter. Q. Have ignition parts failed? A. Have serviced by a Yamaha dealer. Q. Has warning system activated? A. Find and correct cause of warning. Q. Is spark plug gap incorrect? A. Inspect and adjust as specified. Q. Is ignition wiring damaged or poorly connected? A.
Trouble Recovery Q. Is load on boat improperly distributed? A. Distribute load to place boat on an even plane. on gear housing? A. Remove foreign matter and clean lower unit. Q. Is water pump or thermostat faulty? A. Have serviced by a Yamaha dealer. Q. Is fuel system obstructed? A. Check for pinched or kinked fuel line or other obstructions in fuel system. Q. Is there excess water in fuel filter cup? A. Drain filter cup. Q. Is fuel filter clogged? A. Clean or replace filter. Engine power loss. Q.
Trouble Recovery Q. Is fuel joint connection incorrect? A. Connect correctly. Q. Is heat range of spark plug incorrect? A. Inspect spark plug and replace it with recommended type. trailering. Damage could make the outboard motor unsafe to operate. If the outboard motor hits an object in the water, follow the procedure below. Q. Is high pressure fuel pump drive belt broken? A. Have serviced by a Yamaha dealer. Q. Is engine not responding properly to shift lever position? A.
Trouble Recovery 1 2 ZMU01904 EMU29471 Replacing fuse If a fuse has blown, remove the electrical cover, open the fuse holder and remove the fuse with a fuse puller (if equipped). Replace it with a spare one of the proper amperage. EWM00630 WARNING Be sure to use the specified fuse. An incorrect fuse or a piece of wire could allow excessive current flow. This could cause electric system damage and a fire hazard. 1. Fuse (20 A × 3, 30 A, 60 A × 2) 2.
Trouble Recovery coupler. EMU31781 Water separator-warning indicator blinks while cruising EWM01500 WARNING Gasoline is highly flammable, and its vapors are flammable and explosive. ● Do not perform this procedure on a hot or running engine. Allow the engine to cool. ● There will be fuel in the fuel filter. Keep away from sparks, cigarettes, flames or other sources of ignition. ● This procedure will allow some fuel to spill. Catch fuel in a rag. Wipe up any spilled fuel immediately.
Trouble Recovery NOTE: gine oil tank using the emergency switch. Properly dispose of the rag. EWM01050 6. WARNING Firmly screw the filter cup onto the filter housing. NOTE: Be careful not to twist the water detection switch lead when screwing the filter cup onto the filter housing. 7. Be sure to stop the engine before performing this procedure. ECM00900 CAUTION: ● Connect the water detection switch coupler securely until a click is heard. ● 1. 2.
Trouble Recovery EMU29760 Treatment of submerged motor 1 ZMU01907 If the outboard motor is submerged, immediately take it to a Yamaha dealer. Otherwise some corrosion may begin almost immediately. If you cannot immediately take the outboard motor to a Yamaha dealer, follow the procedure below in order to minimize engine damage. EMU29970 1. Emergency switch Procedure 1. 1 2 ZMU01908 1. Engine oil tank 2. Remote oil tank 4. ZMU01909 2.
Trouble Recovery plug holes while rotating the flywheel manually. ZMU01911 5. Take the outboard motor to a Yamaha dealer as soon as possible. ECM00400 CAUTION: Do not attempt to run the outboard motor until it has been completely inspected.
Consumer information EMU29811 Important warranty information for U.S.A.
Consumer information 89
Consumer information EMU29820 YAMAHA MOTOR CORPORATION, U.S.A.
Consumer information 91
Consumer information 92
Consumer information EMU29841 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA 93
6D0-9-17 Hyoshi 07.6.
6D0-9-17 Hyoshi 6/7/07 1:28 PM ページ 4 Printed in Japan June 2007–0.
