OWNER’S MANUAL Read this manual carefully before operating this machine. MZ175 MZ200 MZ250 MZ300 MZ360 PRINTED IN CHINA 2013.11×1 ! (E) 7VB-F8199-11_hyoshi.
Read this manual carefully before operating this machine. This manual should stay with this machine if it is sold. 7VB-F8199-11_hyoshi.
INTRODUCTION Congratulations on your purchase of your new Yamaha. This manual will provide you with a good basic understanding of the operation and maintenance of this machine. If you have any questions regarding the operation or maintenance of your machine, please consult a Yamaha dealer. MZ175, MZ200, MZ250, MZ300, MZ360 OWNER’S MANUAL © 2013 by Yamaha Motor Corporation, U.S.A. 1st Edition, November 2013 All rights reserved.
IMPORTANT MANUAL INFORMATION Particularly important information is distinguished in this manual by the following notations. This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. WARNING A WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CONTENTS SAFETY INFORMATION ....................... 1 Exhaust fumes are poisonous ............ 1 Fuel is highly flammable and poisonous ............................................ 1 Engine and muffler may be hot ........... 2 Electric shock prevention .................... 3 LOCATION OF IMPORTANT LABELS ................................................. 5 DESCRIPTION ..................................... 13 CONTROL FUNCTION ........................ 15 Engine switch ....................................
SAFETY INFORMATION 9 Do not allow children to operate the multi-purpose engine. 9 Do not place any obstacles on the multi-purpose engine. Exhaust fumes are poisonous 9 Using a multi-purpose engine indoors CAN KILL YOU IN MINUTES. Multi-purpose engine exhaust contains carbon monoxide. This is a poison you cannot see or smell. 9 NEVER use inside a home or garage, EVEN IF doors and windows are open. 9 Only use OUTSIDE and far away from windows, doors, and vents.
9 Do not leave the multi-purpose engine inside the vehicle or in the trunk. 9 If you swallow any fuel, inhale fuel vapor, or allow any to get in your eye(s), see your doctor immediately. If any fuel spills on your skin or clothing, immediately wash with soap and water and change your clothes. 9 When refueling, do not place the fuel tank cap near the muffler. 9 Take care not to spill fuel. 9 When operating or transporting the machine, be sure it is kept upright.
9 Avoid placing any flammable materials near the exhaust outlet during operation. 9 In order to prevent overheating, be sure the equipment in which the multi-purpose engine is mounted allows adequate ventilation, and keep the equipment at least 1m (3 ft) from objects or other equipment. 9 Do not operate the engine with a dust cover or other objects covering it. 9 When covering the multi-purpose engine, be sure to do so only after the engine and muffler have completely cooled down.
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LOCATION OF IMPORTANT LABELS Please read the following labels carefully before operating this machine. TIP Maintain or replace safety and instruction labels, as necessary. (MZ175) 3 1 2 2 4 1 This spark ignition system meets all requirements of the Canadian Interference Causing Equipment Regulations. Ce système d’allumage respecte toutes les exigences sur le matériel brouilleur du Canada. 7CC-H2377-50 2 (with fuel tank model) (without fuel tank model) –5– 7VB-F8199-11_E0.
3 7CN-F4162-50 4 –6– 7VB-F8199-11_E0.
(MZ200) 3 4 2 1 1 (with fuel tank model) (without fuel tank model) –7– 7VB-F8199-11_E0.
2 4 This spark ignition system meets all requirements of the Canadian Interference Causing Equipment Regulations. Ce système d’allumage respecte toutes les exigences sur le matériel brouilleur du Canada. 7CC-H2377-50 3 7CN-F4162-50 –8– 7VB-F8199-11_E0.
(MZ250, MZ300 (7VB)) 3 2 1 4 1 (with fuel tank model) (without fuel tank model) –9– 7VB-F8199-11_E0.
2 4 This spark ignition system meets all requirements of the Canadian Interference Causing Equipment Regulations. Ce système d’allumage respecte toutes les exigences sur le matériel brouilleur du Canada. 7CC-H2377-50 3 7CN-F4162-50 – 10 – 7VB-F8199-11_E0.
(MZ300 (7CS), MZ360) 3 2 4 1 1 This spark ignition system meets all requirements of the Canadian Interference Causing Equipment Regulations. Ce système d’allumage respecte toutes les exigences sur le matériel brouilleur du Canada. 7CC-H2377-50 2 (with fuel tank model) (without fuel tank model) – 11 – 7VB-F8199-11_E0.
3 4 7CN-F4162-50 – 12 – 7VB-F8199-11_E0.
DESCRIPTION (MZ175, MZ200, MZ360) 0 1 2 9 3 8 4 5 7 6 (MZ250, MZ300 (7VB)) 0 1 2 9 3 4 8 5 7 6 – 13 – 7VB-F8199-11_E0.
(MZ300 (7CS)) 0 1 2 3 q 9 w 8 4 5 7 6 y 1 Fuel tank cap (On models equipped with a Yamaha fuel tank) 2 Fuel tank (On models equipped with a Yamaha fuel tank) 3 Throttle lever 4 Recoil starter handle 5 Fuel cock lever 6 Fuel cock cup 7 Air filter case cover 8 Choke lever 9 Spark plug 0 Muffler q Oil warning light (Red) w Engine switch e Oil filler cap r Oil drain bolt t Carburetor y Fuel tank filter (On models equipped with a Yamaha fuel tank) q t w e r – 14 – 7VB-F8199-11_E0.
CONTROL FUNCTION A Engine switch 2 The engine switch controls the ignition system. 1 “ON”/“7” (ON) 1 B 1 2 “OFF”/“5” (STOP) Ignition circuit is switched off. The engine will not run. 3 2 Ignition circuit is switched on. The engine can be started. 3 “6” (START) 763-119 Starting circuit is switched on. The starter motor starts and the engine can be started. After starting the engine, take your hand off the switch immediately.
Fuel tank cap (For models equipped with a Yamaha fuel tank) Remove the fuel tank cap by turning it counterclockwise. (On models equipped with a Yamaha fuel tank) Fuel cock lever 2 The fuel cock supplies fuel from the fuel tank to the carburetor. The fuel cock has two positions. 2 1 ON With the lever in this position, fuel flows to the carburetor. Normal using is done with the lever in this position. 1 2 OFF With the lever in this position, fuel will not flow.
Choke lever A Starting a cold engine requires a richer air-fuel mixture, which is supplied by the choke lever. 1 1 Choke lever ABC Functions and specification differs depending on the models. B 1 701-025c C 1 701-033b Throttle lever A Throttle lever controls the engine speed. 1 “ 1 2 ” Lever position to idle the engine. Decrease engine speed. 2 “ ” Increase engine speed. B AB Functions and specification differs depending on the models. 1 2 – 17 – 7VB-F8199-11_E0.
PREPARATION Fuel (For models equipped with a Yamaha fuel tank) WARNING 9 Fuel is highly flammable and poisonous. Check “SAFETY INFORMATION” (See page 1) carefully before filling. 9 Do not fill the fuel above the red line, otherwise it may overflow when the fuel warms up and expands. 9 Wipe up any spilled fuel immediately. 9 After refueling, make sure the fuel tank cap is tightened securely.
Recommended fuel: Unleaded gasoline Fuel tank capacity: Total: MZ175 4.0 L MZ200 4.0 L MZ250 5.5 L MZ300 5.5 L MZ360 6.1 L (1.06 (1.06 (1.45 (1.45 (1.61 US US US US US gal, gal, gal, gal, gal, 0.88 0.88 1.21 1.21 1.34 Imp Imp Imp Imp Imp gal) gal) gal) gal) gal) Your Yamaha engine has been designed to use regular unleaded gasoline with a pump octane number ((R + M)/2) of 86 or higher, or research octane number of 91 or higher. NOTICE Use only unleaded gasoline.
Engine oil NOTICE The multi-purpose engine has been shipped without engine oil. Do not start the engine until you have filled it with the sufficient engine oil. 1. Place the multi-purpose engine on a level surface. 2. Remove the oil filler cap. 1 Oil filler cap 1 3. Fill the specified amount of the recommended engine oil. 700-006 4. Check the oil level of the oil filler hole. 2 2 Correct level 5. Install the oil filler cap. 700-103 – 20 – 7VB-F8199-11_E0.
0˚C 25˚C A YAMALUBE 4 (10W-40) D SAE 10W C SAE #20 32˚F B SAE #30 80˚F Recommended engine oil: A YAMALUBE 4 (10W-40), SAE 10W-30 or 10W-40 B SAE #30 C SAE #20 D SAE 10W Recommended engine oil grade: API Service SE type or higher Engine oil quantity: MZ175 0.6 L (0.63 US MZ200 0.6 L (0.63 US MZ250 1.0 L (1.06 US MZ300 (7VB) 1.0 L (1.06 US MZ300 (7CS) 1.1 L (1.16 US MZ360 1.1 L (1.16 US qt, qt, qt, qt, qt, qt, 0.53 0.53 0.88 0.88 0.97 0.
PRE-OPERATION CHECK WARNING If any item in the Pre-operation check is not working properly, have it inspected and repaired before operating the multi-purpose engine. The condition of a multi-purpose engine is the owner’s responsibility. Vital components can start to deteriorate quickly and unexpectedly, even if the multi-purpose engine is unused. TIP Pre-operation checks should be made each time the multi-purpose engine is used.
OPERATION WARNING Never operate the engine in a closed area or it may cause unconsciousness and death within a short time. Operate the engine in a well ventilated area. NOTICE The multi-purpose engine has been shipped without engine oil. Do not start the engine until you have filled it with the sufficient engine oil. – 23 – 7VB-F8199-11_E0.
Starting the engine 1. Turn the fuel cock lever to ON. 1 ON 1 2. Pull the choke lever fully out. A Turn the choke lever to “1”. B C A 2 Choke lever ABC Functions and specification differs depending on the models. 2 B 2 TIP The choke is not required to start a warm engine. When starting the warm engine, put the choke lever to the original position. 701-025c C 2 701-033 – 24 – 7VB-F8199-11_E0.
3. Move the throttle lever slightly to right. A 3 Throttle lever 3 AB Functions and specification differs depending on the models. B 3 4. Turn the engine switch to “ON”/“7” (ON). A 4 “ON”/“7” (ON) 4 B A Manual starting model B Electric starting model 4 763-127h 5. (Manual starting model) Pull the recoil starter slowly until it is engaged, then pull it briskly. – 25 – 7VB-F8199-11_E0.
5 6. (Electric starting model) Turn the engine switch to “6” (START). Take your hand off the switch immediately after the engine starts. 5 “6” (START) 763-120a NOTICE If the engine fails to start, release the switch, wait a few seconds, then try again. Each attempt should be as short as possible to preserve the battery. Do not crank the engine more than 5 seconds on any one attempt. 7.
8. Set the throttle lever in desired position. A 7 “ 8 “ 7 8 ”: Decrease engine speed ”: Increase engine speed AB Functions and specification differs depending on the models. B 7 8 Stopping the engine A 1. Move the throttle lever fully to the left. 1 Throttle lever AB Functions and specification differs depending on the models. B 1 2. Turn the engine switch to “OFF”/“5” (STOP). A 2 2 “OFF”/“5” (STOP) A Manual starting model B Electric starting model B 2 763-120b – 27 – 7VB-F8199-11_E0.
3. Turn the fuel cock lever to OFF. 3 OFF 3 3 – 28 – 7VB-F8199-11_E0.
High altitude operation This engine may require a high altitude carburetor kit to ensure correct engine operation at altitudes above 4000 ft. (1219 meters). If you operate your engine at altitudes above 4000 ft. (1219 meters) consistently, have your local Yamaha dealer perform the necessary carburetor modification. This engine should be operated in its original configuration below 4000 ft. (1219 meters) as damage may occur if high altitude carburetor kit is installed and operated below 4000 ft.
PERIODIC MAINTENANCE Safety is an obligation of the owner. Periodic inspection, adjustment and lubrication will keep your multi-purpose engine in the safest and most efficient condition possible. The most important points of multi-purpose engine inspection, adjustment, and lubrication are explained on the following pages. WARNING If you are not familiar with maintenance work, have a Yamaha dealer do it for you. Maintenance chart WARNING Stop the engine before starting maintenance work.
Item Routine Crankcase breather hose Cylinder head Valve clearance Idle speed Recoil starter Fittings / fasteners Initial Every Preoperation 1 month 3 months 6 months 12 months check or 20 Hrs or 50 Hrs or 100 Hrs or 300 Hrs • Check breather hose for cracks or damage. 1 • Replace if necessary. • Decarbonize cylinder head. • More frequently if necessary. • Check and adjust when engine is cold. • Check and adjust idle speed. • Check recoil starter for damage. • Check all fittings and fasteners.
Spark plug inspection A The spark plug is an important engine component, which should be checked periodically. 1. Remove the spark plug cap and the spark plug. 2. Check for discoloration and remove the carbon. The porcelain insulator around the center electrode of spark plug should be a medium-to-light tan color. B A MZ175, MZ200 B Except for MZ175, MZ200 3. Check the spark plug type and gap. a Spark plug gap Standard spark plug: BPR4ES (NGK) Spark plug gap: 0.7–0.8 mm (0.028–0.
Carburetor adjustment The carburetor is a vital part of the engine. Adjusting should be left to a Yamaha dealer with the professional knowledge, specialized data, and equipment to do so properly. Engine oil replacement WARNING Avoid draining the engine oil immediately after stopping the engine. The oil is hot and should be handled with care to avoid burns. 1 2 1. Place the multi-purpose engine on a level surface and warm up the engine for several minutes.
6. Add engine oil to the correct level. 5 Correct Level 5 NOTICE Be sure no foreign material enters the crankcase. 700-006a 0˚C 25˚C A YAMALUBE 4 (10W-40) D SAE 10W C SAE #20 32˚F B SAE #30 80˚F Recommended engine oil: A YAMALUBE 4 (10W-40), SAE 10W-30 or 10W-40 B SAE #30 C SAE #20 D SAE 10W Recommended engine oil grade: API Service SE type or higher Engine oil quantity: MZ175 0.6 L (0.63 US MZ200 0.6 L (0.63 US MZ250 1.0 L (1.06 US MZ300 (7VB) 1.0 L (1.06 US MZ300 (7CS) 1.1 L (1.16 US MZ360 1.
A 2 3 1 Air filter 1. Remove the screws, and then remove the air filter case cover. 1 Screw 2 Air filter case cover 2. Remove the foam element. 3 Foam element 3. Wash the foam element in solvent and dry it. WARNING Never use solvent while smoking or in the vicinity of an open flame. 4. Oil the foam element and squeeze out excess oil. The foam element should be wet but not dripping.
Spark arrester WARNING The engine and muffler will be very hot after the engine has been run. Avoid touching the engine and muffler while they are still hot with any part of your body or clothing during inspection or repair. 1 (For MZ250, MZ300 (7VB)) 1. Remove the screw. 1 Screw 2. Use a flathead screw driver to pry the spark arrester out from the muffler. 3. Remove the spark arrester. 2 2 Spark arrester 4. Remove the carbon deposits on the spark arrester using a wire brush.
6. Install the spark arrester. TIP Align the spark arrester lump with the hole in the muffler pipe. 4 3 3 Spark arrester lump 4 Hole 7. Install the screw, and then tighten the screw. (For MZ175, MZ200, MZ360) 1. Loosen the muffler cap bolt and then remove the muffler cap and muffler screen. 2 1 1 Muffler cap bolt 2 Muffler cap 3 Muffler screen 3 2. Use a flathead screw driver to pry the spark arrester out from the muffler. 3. Remove the spark arrester. 4 4 Spark arrester – 37 – 7VB-F8199-11_E0.
4. Remove the carbon deposits on the muffler cap, muffler screen and spark arrester using a wire brush. NOTICE When cleaning, use the wire brush lightly to avoid damaging or scratching of the muffler screen and spark arrester. 5. Check the muffler screen and spark arrester. Replace them if damaged. 6 5 6. Install the spark arrester. TIP Align the spark arrester lump with the hole in the muffler pipe. 5 Spark arrester lump 6 Hole 3 2 7.
Fuel cock WARNING 1 1 Never use the gasoline while smoking or in the vicinity of an open flame. 1. Stop the engine. 2. Turn the fuel cock lever to OFF. 1 OFF 3. Remove the fuel cock cup, gasket and fuel strainer. 2 Fuel cock cup 3 Gasket 4 Fuel strainer 4 3 2 4. Clean the cup and fuel strainer with gasoline and wipe it off. 5. Check the gasket. Replace it if damaged. 6. Install the fuel strainer, gasket and fuel cock cup. WARNING Be sure the fuel cock cup is tightened securely.
Fuel tank filter (For models equipped with a Yamaha fuel tank) 1 WARNING Never use the gasoline while smoking or in the vicinity of an open flame. 2 1. Remove the fuel tank cap and fuel tank filter. 1 Fuel tank cap 2 Fuel tank filter 2. Clean the fuel tank filter with gasoline. Replace it if damaged. 3. Wipe the fuel tank filter and insert it. 4. Install the fuel tank cap. WARNING Be sure the fuel tank cap is tightened securely.
2. Replace the blown fuse with one of proper amperage. 3 Specified fuse: 10 A 779-042 TIP If the fuse immediately blows again, consult a Yamaha dealer. 3 Fuse 3. Install the cover and then tighten the screws. – 41 – 7VB-F8199-11_E0.
STORAGE Long term storage of your machine will require some preventive procedures to guard against deterioration. Drain the fuel A 1. Turn the engine switch to “OFF”/“5” (STOP). 1 1 “OFF”/“5” (STOP) A Manual starting model B Electric starting model 2. Remove the fuel tank cap and fuel tank filter. Extract the fuel from the fuel tank into an approved gasoline container using a commercially available hand siphon. Then, install the fuel tank filter and fuel tank cap.
4. Turn the fuel cock lever to ON. 3 ON 3 5. Start the engine and leave it run until it stops. The engine stops in approximately 20 minutes time by running out of fuel. TIP Duration of the running engine depends on the amount of the fuel left in the tank. 6. Drain the fuel from the carburetor into a clean container by loosening the drain screw on the carburetor float chamber. Pour the drained fuel into the same approved gasoline container as the fuel from the fuel tank. 4 4 Drain Screw 7.
Engine Perform the following steps to protect the cylinder, piston ring, etc. from corrosion. 1. Remove the spark plug, pour about one tablespoon of engine oil (See page 34) into the spark plug hole and reinstall the spark plug. Recoil start the engine by turning over several times (with ignition off) to coat the cylinder walls with oil. 2. Pull the recoil starter until you feel compression. Then stop pulling. (This prevents the cylinder and valves from rusting). 3.
TROUBLESHOOTING Engine won’t start 1. Fuel systems No fuel supplied to combustion chamber. 2 No fuel in tank .... Supply fuel. 2 Fuel in tank .... Fuel cock lever to ON. 1 ON 2 Clogged fuel line .... Clean fuel line. 2 Foreign matter in fuel cock .... Clean fuel cock. 2 Clogged carburetor .... Clean carburetor. 1 2. Engine oil system Insufficient 2 Oil level is low .... Add engine oil. 700-006 3. Electrical systems 2 (Manual starting model) Engine switch to “ON” and pull the recoil starter.
Poor spark 2 Spark plug dirty with carbon or wet .... Remove carbon or wipe spark plug dry. 2 Faulty ignition system .... Consult a Yamaha dealer. – 46 – 7VB-F8199-11_E0.
(Manual starting model) A ENGINE DOES NOT START B Turn the engine switch to “ON”, then pull the recoil starter and check if the oil warning light flickers. E C H Does not flicker D Check engine oil level. Flickers Pull the recoil starter and check the spark plug for spark strength. (See “WARNING”) F OK Consult a Yamaha dealer. G Level low Add engine oil. WARNING 9 To prevent FIRE HAZARDS be sure fuel is not present in the spark plug area.
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(Electric starting model) A ENGINE DOES NOT START B Turn the engine switch to “7” (ON), then turn the engine switch to “6” (START). And check if the starter motor cranks. C F Cranks D Turn the engine switch to “6” (START), and check if the oil warning light comes on. Does not crank P34-1.art G Does not come on H L Turn the engine switch to “6” (START) and check the spark plug for spark strength. (See “WARNING”). OK M WARNING P34-2.
E Faulty battery and/or starter motor. Consult a Yamaha dealer. I Check engine oil level. J OK Consult a Yamaha dealer. O P K Level low Add engine oil. Check the spark plug. 9 Type: BPR4ES 9 Gap: 0.7–0.8 mm (0.028–0.031 in) Incorrect Replace or adjust gap. Q OK Clean the spark plug. – 50 – 7VB-F8199-11_E0.
SPECIFICATIONS Dimensions Unit Overall length Overall width Overall height Dry weight mm (in) mm (in) mm (in) kg (lb) Unit Overall length Overall width Overall height Dry weight mm (in) mm (in) mm (in) kg (lb) Unit Overall length Overall width Overall height Dry weight mm (in) mm (in) mm (in) kg (lb) Unit Overall length Overall width Overall height Dry weight mm (in) mm (in) mm (in) kg (lb) Unit Overall length Overall width Overall height Dry weight mm (in) mm (in) mm (in) kg (lb) MZ175 MZ175 MZ17
Engine MZ175 MZ175 7CN 7CN With fuel tank model Without fuel tank model Type Air cooled 4-stroke Air cooled 4-stroke gasoline gasoline OHV OHV Cylinder arrangement Inclined, 1 cylinder Inclined, 1 cylinder Displacement cm3 171 171 Bore × stroke mm (in) 66.0 × 50.0 66.0 × 50.0 (2.60 × 1.97) (2.60 × 1.97) Fuel Unleaded gasoline Unleaded gasoline Fuel tank capacity L (US gal, 4.0 — Imp gal) (1.06, 0.88) Engine oil quantity L (US qt, 0.6 0.6 Imp qt) (0.63, 0.53) (0.63, 0.
MZ250 7KB Without fuel tank model Type Air cooled 4-stroke gasoline OHV Cylinder arrangement Inclined, 1 cylinder Displacement cm3 253 Bore × stroke mm (in) 74.0 × 59.0 (2.91 × 2.32) Fuel Unleaded gasoline Fuel tank capacity L (US gal, — Imp gal) Engine oil quantity L (US qt, 1.0 Imp qt) (1.06, 0.88) Ignition system TCI Spark plug: Type BPR4ES (NGK) Gap mm (in) 0.7–0.8 (0.028–0.
MZ360 7BY Without fuel tank model Type Air cooled 4-stroke gasoline OHV Cylinder arrangement Inclined, 1 cylinder Displacement cm3 357 Bore × stroke mm (in) 85.0 × 63.0 (3.35 × 2.48) Fuel Unleaded gasoline Fuel tank capacity L (US gal, — Imp gal) Engine oil quantity L (US qt, 1.1 Imp qt) (1.16, 0.97) Ignition system TCI Spark plug: Type BPR4ES (NGK) Gap mm (in) 0.7–0.8 (0.028–0.031) Unit MZ360 7CN Without fuel tank model Air cooled 4-stroke gasoline OHV Inclined, 1 cylinder 357 85.0 × 63.0 (3.35 × 2.
CONSUMER INFORMATION Identification number records PRI-I.D. NUMBER: MODEL PRI-I.D. CODE SERIAL No. Record your Primary I.D., and serial numbers in the spaces provided, to assist you in ordering spare parts from a Yamaha dealer. Also record and keep these I.D. numbers in a separate place in case your machine is stolen. Machine identification The machine serial number is stamped in the location as shown.
EXHAUST EMISSION CONTROL SYSTEM AND COMPONENTS Item Acronym 9 CARB. ASSY., LH. & JT., ....................... CARB (Carburetor) CARBURETOR2 9 T.C.I. MAGNETO ASSY. & ..................... EI (Electronic Ignition) PLUG, SPARK 9 CRANKCASE1 & HEAD, ....................... PCV (Positive Crankcase CYLINDER1 Ventilation) 9 AIR FILTER ASSY. . ................................ ACL (Air Cleaner) 9 MUFF.
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