6N6-9-1H Hyoshi 08.2.21 9:42 ページ 1 115 OWNER’S MANUAL q Read this manual carefully before operating this outboard motor. U.S.A.
6N6-9-1H Hyoshi 08.2.21 9:42 ページ 2 EMU25062 ZMU01690 Read this manual carefully before operating this 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 EMU31283 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 Safety information............................. 1 Outboard motor safety .................... 1 Remote control requirements........ 14 Battery requirements..................... 14 Propeller............................................ 1 Rotating parts.................................... 1 Hot parts ........................................... 1 Electric shock .................................... 1 Power trim and tilt ............................. 1 Engine shut-off cord (lanyard)...........
Table of contents Fuel gauge ...................................... 28 Trip meter / Clock / Voltmeter ......... 28 Fuel level-alert indicator .................. 29 Low battery voltage-alert indicator ........................................ 29 Checks after starting engine ......... 45 Analog tachometer ........................ 29 Shifting ............................................ 45 Stop switches .................................. 45 Oil level indicators (three indicators 2) .........................
Table of contents Checking water in engine oil tank ... 63 Checking wiring and connectors ..... 63 Checking propeller .......................... 63 Removing propeller ......................... 64 Installing propeller ........................... 64 Changing gear oil ............................ 65 Inspecting and replacing anode(s)........................................ 66 Checking battery (for electric start models) ......................................... 67 Connecting the battery ....................
Safety information EMU33622 Outboard motor safety Observe these precautions at all times. EMU36500 Propeller People can be injured or killed if they come in contact with the propeller. The propeller can keep moving even when the motor is in neutral, and sharp edges of the propeller can cut even when stationary. ● Shut off the engine when a person is in the water near you. ● Keep people out of reach of the propeller, even when the engine is off.
Safety information EMU33820 Gasoline exposure and spills Take care not to spill gasoline. If gasoline spills, wipe it up immediately with dry rags. Dispose of rags properly. If any gasoline spills onto your skin, immediately wash with soap and water. Change clothing if gasoline spills on it. If you swallow gasoline, inhale a lot of gasoline vapor, or get gasoline in your eyes, get immediate medical attention. Never siphon fuel by mouth.
Safety information dling and lead to an accident, capsizing or swamping. EMU33771 Avoid collisions Scan constantly for people, objects, and other boats. Be alert for conditions that limit your visibility or block your vision of others. ZMU06025 Operate defensively at safe speeds and keep a safe distance away from people, objects, and other boats. ● Do not follow directly behind other boats or waterskiers.
Safety information go to boatus.org. EMU33880 Passenger training Make sure at least one other passenger is trained to operate the boat in the event of an emergency. EMU33890 Boating safety publications Be informed about boating safety. Additional publications and information can be obtained from many boating organizations. EMU33590 Laws and regulations Know the marine laws and regulations where you will be boating- and obey them.
Safety information EMU33700 Steering and sailing rules and sound signals Whenever two vessels on the water meet one another, one vessel has the right-ofway; it is called the “stand-on” vessel. The vessel that does not have the right-of-way is called the “give-way” or “burdened”vessel. These rules determine which vessel has the right-of-way, and what each vessel should do. Stand-on vessel The vessel with the right-of-way has the duty to continue its course and speed, except to avoid an immediate collision.
Safety information EMU25531 Other special situations Crossing When two power driven vessels are crossing each other’s path close enough to run the risk of collision, the vessel which has the other on the starboard (right) side must keep out of the way of the other. If the other vessel is on your right, you must keep out of its way; you are the Give-Way vessel.
Safety information Reading buoys and other markers The waters of the United States are marked for safe navigation by the lateral system of buoyage. Simply put, buoys and markers have an arrangement of shapes, colors, numbers and lights to show which side of the buoy a boater should pass on when navigating in a particular direction. The markings on these buoys are oriented from the perspective of being entered from seaward (the boater is going towards the port).
Safety information ZMU01708 8
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 1.
General information EMU33520 Read manuals and labels Before operating or working on this motor: ● Read this manual. ● Read any manuals supplied with the boat. ● Read all labels on the outboard motor and the boat. If you need any additional information, contact your Yamaha dealer. EMU33831 Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements.
General information 1 2 3 ZMU05670 11
General information EMU33843 Symbols The following symbols mean as follows.
Specifications and requirements EMU31480 Specifications TIP: “(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. EMU2821C Dimension: Overall length: 808 mm (31.8 in) Overall width: 582 mm (22.9 in) Overall height L: 1472 mm (58.0 in) Transom height L: 516 mm (20.3 in) Weight (without propeller) L: 163.
Specifications and requirements Gear oil quantity: 0.760 L (0.803 US qt, 0.669 Imp.qt) Tightening torque for engine: Spark plug: 25.0 Nm (2.55 kgf-m, 18.4 ft-lb) Propeller nut: 55.0 Nm (5.61 kgf-m, 40.6 ft-lb) EMU33553 Installation requirements EMU33563 Boat horsepower rating EWM01560 WARNING Overpowering a boat can cause severe instability. ● move suddenly and unexpectedly, possibly causing a collision or throwing passengers overboard.
Specifications and requirements boat. WARNING! Do not put flammable items, or loose heavy or metal objects in the same compartment as the battery. Fire, explosion or sparks could result. For instructions on propeller removal and installation, see page 63. x [EWM01820] 1 EMU36300 2 3 Multiple batteries To connect multiple batteries, such as for multiple engine configurations or for an accessory battery, consult your Yamaha dealer about battery selection and correct wiring.
Specifications and requirements another outboard motor manufacturer’s factory-brand TC-W3 oil. EMU36360 Fuel requirements EMU36780 Gasoline Use a good quality gasoline that meets the minimum octane rating. If knocking or pinging occurs, use a different brand of gasoline or premium unleaded fuel. Yamaha recomends that you use alcohol-free (see Gasohol) gasoline whenever possible.
Specifications and requirements EMU36880 EMU30390 Muddy or acidic water Yamaha strongly recommends that you have your dealer install the optional chromiumplated water pump kit if you use the outboard motor in muddy or acidic water conditions. However, depending on the model it might not be required. EMU36330 Approval label of emission control certificate This label is attached to the bottom cowling. Existing Technology; N/A 1 Anti-fouling paint A clean hull improves boat performance.
Specifications and requirements 1 ZMU04618 1.
Components EMU2579H Components diagram TIP: * May not be exactly as shown; also may not be included as standard equipment on all models. 115 1 12 11 13 2 3 14 15 16 4 10 9 5 6 17 18 19 8 7 ZMU04764 1. Top cowling 2. Power trim and tilt switch 3. Flushing device 4. Tilt support lever 5. Anti-cavitation plate 6. Trim tab (anode) 7. Propeller* 8. Cooling water inlet 9. Anode 10. Clamp bracket 11. Top cowling release lever 12. Choke knob 13. Cooling water pilot hole 14.
Components 6. Throttle 7. Fully open EMU26201 Neutral interlock trigger To shift out of neutral, first pull the neutral interlock trigger up. 1. Power trim and tilt switch 2. Remote control lever 3. Neutral interlock trigger 4. Neutral throttle lever 5. Main switch / choke switch 6. Engine stop lanyard switch 7. Throttle friction adjuster 1. Neutral interlock trigger EMU26190 Remote control lever Moving the lever forward from the neutral position engages forward gear.
Components resistance, it could be difficult to move the remote control lever or throttle grip, which could result in an accident. [EWM00032] To decrease resistance, turn the adjuster counterclockwise. 1. Fully open 2. Fully closed EMU26221 Choke switch To activate the choke system, press in the main switch while the key is turned to the “ ” (on) or “ ” (start) position. The choke system will then supply the rich fuel mixture required to start the engine.
Components thrown forward. [EWM00122] “ ” (start) With the main switch in the “ ” (start) position, the starter motor turns to start the engine. When the key is released, it returns automatically to the “ ” (on) position. ● 1. Cord 2. Clip 3. Engine shut-off switch EMU26011 EMU32052 Choke knob for pull type To supply the engine with the rich fuel mixture required to start, pull out this knob. ZMU03903 EMU26090 Main switch The main switch controls the ignition system; its operation is described below.
Components Power trim and tilt switch on bottom engine cowling placed to be sure steering is correct. Be sure you have tightened the bolt after adjusting the trim tab. 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. When the switch is released, the outboard motor will stop in its current position.
Components EMU26400 Top cowling release lever The top cowling can be removed by operating the cowling release lever. Pulling the front lever unlocks the top cowling for removal. A B ZMU01863 Bolt tightening torque: 42.0 Nm (4.2 kgf-m, 31 ft-lb) EMU26341 Tilt support lever for power trim and tilt model To keep the outboard motor in the tilted up position, lock the tilt support lever to the clamp bracket. 1 ZMU03518 When installing the top cowling: 1.
Components ● ● ● ● cable is operating correctly before reinstalling the top cowling. When the release lever is operated, both the front and rear cowling hooks should be released at the same time. If not, adjust the rear clamp cable adjusters. Make sure the cable operates smoothly and is free of corrosion. Check that the cable is properly secured in the holder. When reinstalling the cowling, ensure that both the front and rear locks have operated properly.
Instruments and indicators EMU26493 Digital tachometer The tachometer shows the engine speed and has the following functions. All segments of the display will light momentarily after the main switch is turned on and will return to normal thereafter. ZMU01869 1 2 3 4 5 6 7 ZMU01891 EMU26651 Hour meter This meter shows the number of hours the 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.
Instruments and indicators alert indicator will start to blink. For further information, see page 31. EMU26602 ECM00030 This gauge shows the boat speed and other information. NOTICE Digital speedometer Do not operate the engine without oil. Serious engine damage will occur. 1 ZMU01867 1. Oil level indicator EMU26583 Overheat-alert indicator If the engine temperature rises too high, the alert indicator will start to blink. For further information on reading the indicator, see page 31.
Instruments and indicators EMU26712 Fuel gauge Eight segments indicate the fuel level. When all segments are showing, the fuel tank is full. (set) and “ ” (mode) buttons at the same time. The trip distance is kept in memory by battery power. The stored data will be lost if the battery is disconnected. ZMU01745 The fuel level reading can be inaccurate due to by the position of the sensor in the fuel tank and the attitude of the boat in the water.
Instruments and indicators connecting the battery will stop the clock. Reset the clock after connecting the battery. EMU36080 Voltmeter The voltmeter displays the charge of the battery in volts(V). EMU26721 Fuel level-alert indicator If the fuel level decreases to one segment, the fuel level alert segment will blink. Do not continue to operate the engine with full throttle if an alert device has activated. Get back to the port within trolling engine speed.
Instruments and indicators 1 ZMU04580 1. Oil level indicators EMU26611 Analog trim meter This gauge shows the trim angle of your outboard motor. ZMU04581 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.
Engine control system EMU26803 Alert system ECM00091 NOTICE Do not continue to operate the engine if a alert device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected. EMU2681A Overheat alert This engine has an overheat-alert device. If the engine temperature rises too high, the alert device will activate. ● The engine speed will automatically decrease to about 2000 r/min. ● The overheat-alert indicator will light or blink.
Engine control system nally oil filter clogging. 1 ZMU03942 ZMU03906 1. Oil filter ZMU04586 ● The buzzer will sound (if equipped on the tiller handle, remote control box, or main switch panel). 1 1. Oil filter ZMU03025 If the alert system has been activated, stop the engine and check for the cause. TIP: The alert for oil filter clogging is similar to the alerts for low oil level and overheating.
Installation 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.
Installation ZMU01762 ECM01630 NOTICE ● ● During water testing, check the buoyancy of the boat, at rest, with its maximum load. Check that the static water level on the exhaust housing is low enough to prevent water entry into the power head when water rises due to waves when the outboard is not running.
Operation EMU36380 First-time operation EMU27020 Breaking in engine 2. 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. ECM00140 NOTICE ● ● 3. Failure to follow the break-in procedure could result in reduced engine life or even severe engine damage. Premix fuel must be used during breakin in addition to oil in the oil injection system.
Operation dent could occur. sources of ignition. ECM00120 EWM00910 NOTICE WARNING Do not start the engine out of water. Overheating and serious engine damage can occur. EMU37150 Fuel level Be sure you have plenty of fuel for your trip. A good rule is to use 1/3 of your fuel to get to the destination, 1/3 to return, and to keep 1/ 3 as an emergency reserve. With the boat level on a trailer or in the water, turn the key to “ ”(on) and check the fuel level. For fuel filling instructions, see page 40.
Operation ● ● Operate the throttle levers several times to make sure there is no hesitation in their travel. Operation should be smooth over the complete range of motion, and each lever should return completely to the idle position. Look for loose or damaged connections of the throttle and shift cables under the engine cowling. EMU36481 Engine shut-off cord (lanyard) Inspect the engine shut-off cord for damage, such as cuts, breaks, and wear. lows: 1.
Operation the cowling can damage the engine, or the cowling can blow off at high speeds. [ECM01990] 1 ZMU04139 1. Flushing device ZMU06126 EMU37520 Install cowling 1. 2. 3. 4. 5. Be sure that a cowling lock lever is released. Be sure that the rubber seal is seated all the way around the engine. Set the top cowling straight down onto the engine, being careful to avoid catching spark plug wires or other wires. Align the three cowling hooks with the locks on the bottom cowling.
Operation 1. 2. 3. rods have retracted completely into the cylinders. Check the power trim and tilt unit for any sign of oil leaks. Operate each of the power trim and tilt switches on the remote control and engine bottom cowling to check that all switches work. Tilt the outboard motor up and check that the tilt rod and trim rods are extended completely. ZMU04156 7. 1 Activate the trim-up switch until the tilt rod is fully extended. Unlock the tilt support lever. 2 ZMU03458 1. Tilt rod 2.
Operation EMU27234 Filling fuel and engine oil EMU30321 Filling fuel for models without a fuel joint EWM01830 WARNING ● ● Gasoline and its vapors are highly flammable and explosive. Always refuel according to this procedure to reduce the risk of fire and explosion. Gasoline is poisonous and can cause injury or death. Handle gasoline with care. Never siphon gasoline by mouth.
Operation oil injection system will automatically feed oil from the remote oil tank to the engine oil tank. OFF ON START ZMU04143 3. After the engine oil tank has filled, turn off the main switch to cancel the oil level alert. OFF ON START ZMU04144 4. Operate the engine normally. ECM00570 NOTICE When the engine is operated for the first time or stored for a period of time, a minimum of 5 liters (5.3 US qt, 4.4 Imp qt) of oil should be kept in the remote oil tank.
Operation EMU27321 Oil level indicator operation The various functions of the oil level system are as follows: EMU27383 Oil level indicator Electric start models Oil level-alert indicator (digital tachometer) Oil level-alert 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 EMU27451 Operating engine EMU27482 Feeding fuel EWM00420 WARNING ● ● ● 1. 2. 3. 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.
Operation using the neutral throttle lever or free accelerator. You may need to change the throttle opening slightly depending on engine temperature. After the engine starts, return the throttle to the original position. N TIP: The start-in-gear protection device prevents the engine from starting except when in neutral. 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. 3.
Operation OFF ON overheating and serious damage could occur. Stop the engine and check whether the cooling water inlet on the lower case or the cooling water pilot hole is blocked. Consult your Yamaha dealer if the problem cannot be located and corrected. START ZMU03262 7. Immediately after the engine starts, release the main switch and allow it to return to “ ” (on). NOTICE: Never turn the main switch to “ ” (start) while the engine is running.
Operation ● ● Confirm that removing the clip from the engine shut-off switch stops the engine. Confirm that the engine cannot be started with the clip removed from the engine shut-off switch. EMU31730 Shifting EWM00180 WARNING Before shifting, make sure there are no swimmers or obstacles in the water near you. ECM01610 NOTICE To shift from in gear (forward/reverse) to neutral 1. Close the throttle so that the engine slows to idle speed. Warm up the engine before shifting into gear.
Operation EMU31742 Stopping boat EWM01510 3. WARNING ● ● Do not use the reverse function to slow down or stop the boat as it could cause you to lose control, be ejected, or impact the steering wheel or other parts of the boat. This could increase the risk of serious injury. It could also damage the shift mechanism. Do not shift into reverse while traveling at planing speeds. Loss of control, boat swamping, or damage to the boat could occur. The boat is not equipped with a separate braking system.
Operation switch while the boat is moving. Adjust the outboard motor trim angle using the power trim and tilt switch. 1. Power trim and tilt switch 1 ZMU04145 1 UP 1. Trim operating angle EMU27884 Adjusting trim angle (Power trim and tilt) DN ZMU03522 EWM00753 WARNING ● ● ● Be sure all people are clear of the outboard motor when adjusting the trim angle. Body parts can be crushed between the motor and the clamp bracket when the motor is trimmed or tilted.
Operation cy to steer to one side or the other. Compensate for this as you steer. The trim tab can also be adjusted to help offset this effect. When the bow of the boat is down, it is easier to accelerate from a standing start onto plane. also makes the boat unstable. Resistance at the bow is greatly increased, heightening the danger of “bow steering” and making operation difficult and dangerous. TIP: Bow Up Too much trim-out puts the bow of the boat too high in the water.
Operation few minutes. Otherwise fuel may leak. ECM00241 NOTICE ● ● Before tilting the outboard motor, stop the engine by following the procedure on page 47. Never tilt the outboard motor while the engine is running. Severe damage from overheating can result. Do not tilt up the engine by pushing the tiller handle (if equipped) because this could break the handle. UP ZMU04146 3. EMU32723 Procedure for tilting up (power trim and tilt models) 1. Place the remote control lever in neutral.
Operation and tilt switch “ ” (down) to retract the trim rods. NOTICE: 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. [ECM00251] DN UP DN ZMU01936 ZMU03452 DN EMU33120 Procedure for tilting down (power trim and tilt models) 1. 2. Push the power trim and tilt switch “ ” (up) until the outboard motor is supported by the tilt rod and the tilt support lever becomes free.
Operation mal running position, press the power trim and tilt switch and slowly tilt the outboard motor down. EMU28194 Cruising in other conditions 2. Slightly tilt the outboard motor up to the desired position using the power trim and tilt switch. WARNING! Using the power trim and tilt switch on the bottom cowling while the boat is moving or engine is on could increase the risk of falling overboard and could distract the operator, increasing the risk of collision with another boat or an obstacle.
Maintenance EMU28226 Transporting and storing outboard motor EWM00692 WARNING ● ● USE CARE when transporting fuel tank, whether in a boat or car. DO NOT fill fuel container to maximum capacity. Gasoline will expand considerably as it warms up and can build up pressure in the fuel container. This can cause fuel leakage and a potential fire hazard. for prolonged periods of time (2 months or longer), several important procedures must be performed to prevent excessive damage.
Maintenance Stabilizer” eliminates the need to drain the fuel system. Consult your Yamaha dealer or other qualified mechanic if the fuel system is to be drained instead. 3. Remove the top cowling and silencer cover/cap. Remove the propeller. 4. Install the flushing attachment over the cooling water inlet. NOTICE: Do not run the engine without supplying it with cooling water. Either the engine water pump will be damaged or the engine will be damaged from overheating.
Maintenance oil and procedures for your engine. EMU28423 1 Cleaning and anticorrosion measures 1. 2. 3. 2 3 Wash down the exterior of the outboard motor with fresh water and dry off completely. NOTICE: Do not spray water into the air intake. [ECM01840] Spray the outboard motor exterior with “Yamaha Silicone Protectant”. Wax the cowling with a non-abrasive wax such as “Yamaha Silicone Wax”. EMU28443 Flushing power unit Perform this procedure right after operation for the most thorough flushing.
Maintenance cooling the engine, which can cause serious overheating. Be sure the connector is tightened securely on the fitting after flushing the engine. [ECM00541] TIP: ● ● 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 53. EMU28450 Cleaning the outboard motor After use, wash the exterior of the outboard motor with fresh water.
Maintenance have the mechanical skills, tools, and other equipment necessary to perform maintenance not covered by this owner’s manual. EMU28511 Replacement parts If replacement parts are necessary, use only genuine Yamaha parts or parts of equivalent design and quality. Any part of inferior quality may malfunction, and the resulting loss of control could endanger the operator and passengers. Yamaha genuine parts and accessories are available from your Yamaha dealer.
Maintenance EMU34445 Maintenance chart 1 TIP: Refer to the sections in this chapter for explanations of each owner-specific action. The maintenance cycle on these charts assume usage of 100 hours per year and regular flushing of the cooling water passages. Maintenance frequency should be adjusted when operating the engine under adverse conditions such as extended trolling. ● Disassembly or repairs may be necessary depending on the outcome of maintenance checks.
Maintenance Initial Item Fuel line(High pressure) Fuel line(Low pressure) Fuel line(Low pressure) Fuel pump Actions Replacement Greasing points Greasing Impeller/water pump housing Impeller/water pump housing Inspection or replacement as necessary Oil tank water drain Inspection or cleaning Oil injection pump/oil feed pump Power trim & tilt unit/ Operation,noise and oil leakage Propeller/Propeller nut/ Cotter pin Inspection or Adjustment Thermostat Water inlet 500 hours (5 years) Inspection or
Maintenance Initial Item Actions Main switch/stop switch/choke switch Inspection or replacement as necessary (Yamaha) Meter/gauge Inspection 20 hours (3 months) Every 100 hours (1 year) 300 hours (3 years) EMU34451 Maintenance chart 2 Every Item Actions 1000 hours Guide exhaust/exhaust manifold 60 Inspection or replacement as necessary 500 hours (5 years)
Maintenance EMU28932 Greasing Yamaha marine grease (Water resistant grease) 115 ZMU04149 EMU28955 Cleaning and adjusting spark plug 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 to slowly break down and erode. If electrode erosion becomes excessive, or if carbon and other deposits are excessive, you should replace the spark plug with another of the correct type. 1. Remove the spark plug caps from the spark plugs. 2. Remove the spark plug. If electrode erosion becomes excessive, or if carbon and other deposits are excessive, you should replace the spark plug with another of the correct type.
Maintenance parts while the engine is running. ECM00490 NOTICE This procedure must be performed while the outboard motor is in the water. A flushing attachment or test tank can be used. A diagnostic tachometer should be used for this procedure. Results may vary depending on whether testing is conducted with the flushing attachment, in a test tank, or with the outboard motor in the water. 1. Start the engine and allow it to warm up fully in neutral until it is running smoothly. 2 1 ZMU01895 1.
Maintenance Turn off the battery cut-off switch if your boat has one. EMU30661 Removing propeller EMU29197 Do not use your hand to hold the propeller when loosening or tightening the propeller nut. Put a wood block between the anti-cavitation plate and the propeller to prevent the propeller from turning. 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).
Maintenance 2. 3. shaft. Install the spacer (if equipped), thrust washer, washer (if equipped), and propeller on the propeller shaft. NOTICE: Be sure to install the thrust washer before installing the propeller, otherwise the lower case and propeller boss could be damaged. [ECM01880] Install the spacer (if equipped) and the washer. Tighten the propeller nut to the specified torque. Propeller nut tightening torque: 55.0 Nm (5.61 kgf-m, 40.6 ft-lb) 4. ● 1. 2. 3.
Maintenance been drained. If the oil is milky, water is getting into the gear case which can cause gear damage. Consult a Yamaha dealer for repair of the lower unit seals. [ECM00711] TIP: For disposal of used oil, consult your Yamaha dealer. 5. Put the outboard motor in a vertical position. 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: 0.760 L (0.803 US qt, 0.669 Imp.
Maintenance EMU29322 Checking battery (for electric start models) 3. EWM01900 WARNING Battery electrolytic fluid is poisonous and caustic, and batteries generate explosive hydrogen gas. When working near the battery: ● Wear protective eye gear and rubber gloves. ● Do not smoke or bring any other source of ignition near the battery. Refer to page 14 for detailed safety information about batteries. The procedure for checking the battery varies for different batteries.
Maintenance cables must be clean and properly connected, or the battery will not start the engine. EMU29371 Disconnecting the battery 1. 2. Turn off the battery cut-off switch (if equipped) and main switch. NOTICE: If they are left on, the electrical system can be damaged. [ECM01930] Disconnect the negative cable(s) from the negative (-) terminal. NOTICE: Always disconnect all negative (-) cables first to avoid a short circuit and damage to the electrical system. [ECM01940] 3. 4.
Trouble Recovery EMU29427 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-alert indicator is flashing, consult your Yamaha dealer. Starter will not operate. Q.
Trouble Recovery Q. Is fuel system obstructed? 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 alert system activated? A. Find and correct cause of alert. 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 EMU29533 Starter will not operate If the starter mechanism does not operate (the engine cannot be cranked with the starter), the engine can be started with an emergency starter rope. 2 EWM01022 1 WARNING ● ZMU04152 1. Fuse holder 2. Fuse (20 A, 30 A) ● Consult your Yamaha dealer if the new fuse immediately blows again.
Trouble Recovery ● wheel or other moving parts when the engine is running. Do not install the starter mechanism or top cowling after the engine is running. Do not touch the ignition coil, spark plug wire, spark plug cap, or other electrical components when starting or operating the motor. You could get an electrical shock. ZMU02334 EMU29562 Emergency starting engine 1. 2. 3. Remove the top cowling. Remove the start-in-gear protection cable from the starter, if equipped.
Trouble Recovery and start the engine. Repeat if necessary. OFF ON START ZMU01906 ZMU03466 3. EMU29671 Engine fails to operate Lift the emergency switch to pump reserve oil into the engine oil tank from the remote oil tank. EMU29742 Low oil level alert activates If the oil level is allowed to drop too low, the red segment will appear on the oil level indicator, the buzzer will sound, and engine speed will be limited to about 2000 r/min.
Trouble Recovery operation. The yellow segment will continue to be displayed on the oil level indicator. Start the engine and return to the nearest port for more oil. 5. TIP: The maximum reserve oil capacity is 1500 cm3 (1.6 US qt, 1.31 Imp qt). The oil-feed pump will not operate if the engine is tilted up more than 35°. Put the engine in the upright position (not tilted) before using the emergency switch.
Consumer information EMU29811 Important warranty information for U.S.A.
Consumer information 78
Consumer information EMU29820 YAMAHA MOTOR CORPORATION, U.S.A.
Consumer information 80
Consumer information 81
Consumer information EMU29841 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA 82
6N6-9-1H Hyoshi 08.2.
6N6-9-1H Hyoshi 08.2.21 9:42 ページ 4 Printed in Japan April 2008-0.
