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Yamaha MZ175 Owner's Manual

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OWNER'S MANUAL
Read this manual carefully before operating this machine.
MZ175
MZ200
MZ250
MZ300
MZ360
PRINTED IN CHINA
LIT-19626-02-05
2013.11×1 !
7VB-F8199-11
(E)

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  Summary of Contents for Yamaha MZ175

  • Page 1 OWNER’S MANUAL Read this manual carefully before operating this machine. MZ175 MZ200 MZ250 MZ300 MZ360 PRINTED IN CHINA LIT-19626-02-05 2013.11×1 ! 7VB-F8199-11...
  • Page 2 Read this manual carefully before operating this machine. This manual should stay with this machine if it is sold.
  • Page 3 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.
  • Page 4 OPERATING THE MACHINE. A WARNING indicates a hazardous sit- uation which, if not avoided, could result in death or serious injury. 9 Yamaha continually seeks advance- ments in product design and quality. Therefore, while this manual contains NOTICE the most current product information...
  • Page 5: Table Of Contents

    CONTENTS SAFETY INFORMATION ....... 1 Fuel tank filter (For models equipped with a Yamaha fuel tank) ... 40 Exhaust fumes are poisonous .... 1 Fuse replacement Fuel is highly flammable and (For electric starting model) ....40 poisonous ..........1 STORAGE ..........
  • Page 6: Safety Information

    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.
  • Page 7: Engine And Muffler May Be Hot

    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 immedi- ately. If any fuel spills on your skin or clothing, immediately wash with soap and water and change your clothes.
  • Page 8: Electric Shock Prevention

    9 Avoid placing any flammable materials near the exhaust outlet during operation. 9 In order to prevent overheating, be sure the equip- ment in which the multi-purpose engine is mount- ed allows adequate ventilation, and keep the equipment at least 1m (3 ft) from objects or other equipment.
  • Page 9 – 4 –...
  • Page 10: Location Of Important Labels

    Please read the following labels carefully before oper- ating this machine. Maintain or replace safety and instruction labels, as necessary. (MZ175) This spark ignition system meets all re- quirements of the Canadian Interference Causing Equipment Regulations. Ce système d’allumage respecte toutes les exigences sur le matériel brouilleur du...
  • Page 11 7CN-F4162-50 – 6 –...
  • Page 12 (MZ200) 1 (with fuel tank model) (without fuel tank model) – 7 –...
  • Page 13 This spark ignition system meets all re- quirements of the Canadian Interference Causing Equipment Regulations. Ce système d’allumage respecte toutes les exigences sur le matériel brouilleur du Canada. 7CC-H2377-50 7CN-F4162-50 – 8 –...
  • Page 14 (MZ250, MZ300 (7VB)) 1 (with fuel tank model) (without fuel tank model) – 9 –...
  • Page 15 This spark ignition system meets all re- quirements of the Canadian Interference Causing Equipment Regulations. Ce système d’allumage respecte toutes les exigences sur le matériel brouilleur du Canada. 7CC-H2377-50 7CN-F4162-50 – 10 –...
  • Page 16 (MZ300 (7CS), MZ360) This spark ignition system meets all re- quirements 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) –...
  • Page 17 7CN-F4162-50 – 12 –...
  • Page 18: Description

    DESCRIPTION (MZ175, MZ200, MZ360) (MZ250, MZ300 (7VB)) – 13 –...
  • Page 19 1 Fuel tank cap (On models (MZ300 (7CS)) 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...
  • Page 20: Control Function

    CONTROL FUNCTION Engine switch The engine switch controls the ignition system. 1 “ON”/“7” (ON) Ignition circuit is switched on. The engine can be started. 2 “OFF”/“5” (STOP) Ignition circuit is switched off. The engine will not run. 3 “6” (START) Starting circuit is switched on.
  • Page 21: Fuel Tank Cap (For Models Equipped With A Yamaha Fuel Tank)

    Fuel tank cap (For models equipped with a Yamaha fuel tank) Remove the fuel tank cap by turning it counterclock- wise. (On models equipped with a Yamaha fuel tank) Fuel cock lever The fuel cock supplies fuel from the fuel tank to the carburetor.
  • Page 22: Choke Lever

    Choke lever Starting a cold engine requires a richer air-fuel mix- ture, which is supplied by the choke lever. 1 Choke lever A B C Functions and specification differs depending on the models. 701-025c 701-033b Throttle lever Throttle lever controls the engine speed. 1 “...
  • Page 23: Preparation

    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, other- wise it may overflow when the fuel warms up and expands.
  • Page 24 5.5 L (1.45 US gal, 1.21 Imp gal) MZ360 6.1 L (1.61 US gal, 1.34 Imp gal) Your Yamaha engine has been designed to use regu- lar unleaded gasoline with a pump octane number ((R + M)/2) of 86 or higher, or research octane number of 91 or higher.
  • Page 25: Engine Oil

    Engine oil NOTICE The multi-purpose engine has been shipped with- out 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 3.
  • Page 26: Connecting The Battery (For Models Equipped With Electric Starter)

    32˚F 80˚F Recommended engine oil grade: API Service SE type or higher Engine oil quantity: MZ175 0.6 L (0.63 US qt, 0.53 Imp qt) MZ200 0.6 L (0.63 US qt, 0.53 Imp qt) MZ250 1.0 L (1.06 US qt, 0.88 Imp qt) MZ300 (7VB) 1.0 L (1.06 US qt, 0.88 Imp qt)
  • Page 27: Pre-Operation Check

    Pre-operation checks should be made each time the multi-purpose engine is used. Pre-operation check Fuel (See page 18 for Yamaha fuel tank instructions) 9 Check fuel level in fuel tank. 9 Refuel if necessary. Fuel line 9 Check fuel hose for cracks or damage.
  • Page 28: Operation

    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 with- out engine oil. Do not start the engine until you have filled it with the sufficient engine oil.
  • Page 29: Starting The Engine

    Starting the engine 1. Turn the fuel cock lever to ON. 1 ON 2. Pull the choke lever fully out. A Turn the choke lever to . B C “1” 2 Choke lever A B C Functions and specification differs depending on the models. The choke is not required to start a warm engine.
  • Page 30 3. Move the throttle lever slightly to right 3 Throttle lever Functions and specification differs depending on the models. 4. Turn the engine switch to “ON”/“7” (ON). 4 “ON”/“7” (ON) A Manual starting model B Electric starting model 763-127h 5. (Manual starting model) Pull the recoil starter slowly until it is engaged, then pull it briskly.
  • Page 31 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.
  • Page 32: Stopping The Engine

    8. Set the throttle lever in desired position. 7 “ ” Decrease engine speed 8 “ ” Increase engine speed Functions and specification differs depending on the models. Stopping the engine 1. Move the throttle lever fully to the left 1 Throttle lever Functions and specification differs depending on the models.
  • Page 33 3. Turn the fuel cock lever to OFF. 3 OFF – 28 –...
  • Page 34: High Altitude Operation

    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 config- uration below 4000 ft.
  • Page 35: Periodic Maintenance

    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.
  • Page 36 *1·····The air filter element needs to be cleaned more frequently when using in unusually wet or dusty areas. ·····Since these items require special tools, data and technical skills, have a Yamaha dealer per- form the service. – 31 –...
  • Page 37: Spark Plug Inspection

    The porcelain insulator around the center elec- trode of spark plug should be a medium-to-light tan color. A MZ175, MZ200 B Except for MZ175, MZ200 3. Check the spark plug type and gap. a Spark plug gap Standard spark plug:...
  • Page 38: Carburetor Adjustment

    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.
  • Page 39 32˚F 80˚F Recommended engine oil grade: API Service SE type or higher Engine oil quantity: MZ175 0.6 L (0.63 US qt, 0.53 Imp qt) MZ200 0.6 L (0.63 US qt, 0.53 Imp qt) MZ250 1.0 L (1.06 US qt, 0.88 Imp qt) MZ300 (7VB) 1.0 L (1.06 US qt, 0.88 Imp qt)
  • Page 40: Air Filter

    The engine should never run without the foam ele- ment; excessive piston and cylinder wear may result. 6. Install the air filter case cover and tighten the screws. A MZ175, MZ200, MZ300 (7CS), MZ360 B MZ250, MZ300 (7VB) – 35 –...
  • Page 41: Spark Arrester

    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. (For MZ250, MZ300 (7VB)) 1.
  • Page 42 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. 1 Muffler cap bolt...
  • Page 43 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.
  • Page 44: Fuel Cock

    Fuel cock WARNING 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 strain- 2 Fuel cock cup 3 Gasket 4 Fuel strainer...
  • Page 45: Fuel Tank Filter (For Models Equipped With A Yamaha Fuel Tank)

    Fuel tank filter (For models equipped with a Yamaha fuel tank) WARNING Never use the gasoline while smoking or in the vicinity of an open flame. 1. Remove the fuel tank cap and fuel tank filter. 1 Fuel tank cap 2 Fuel tank filter 2.
  • Page 46 2. Replace the blown fuse with one of proper amper- age. Specified fuse: 10 A 779-042 If the fuse immediately blows again, consult a Yamaha dealer. 3 Fuse 3. Install the cover and then tighten the screws. – 41 –...
  • Page 47: Storage

    STORAGE Long term storage of your machine will require some preventive procedures to guard against deterioration. Drain the fuel 1. Turn the engine switch to “OFF”/“5” (STOP). 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.
  • Page 48 4. Turn the fuel cock lever to ON. 3 ON 5. Start the engine and leave it run until it stops. The engine stops in approximately 20 minutes time by running out of fuel. Duration of the running engine depends on the amount of the fuel left in the tank.
  • Page 49: Engine

    Engine Perform the following steps to protect the cylinder, pis- ton ring, etc. from corrosion. 1. Remove the spark plug, pour about one table- spoon 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 igni- tion off) to coat the cylinder walls with oil.
  • Page 50: Troubleshooting

    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 ..
  • Page 51 Poor spark 2 Spark plug dirty with carbon or wet ..Remove carbon or wipe spark plug dry. 2 Faulty ignition system ..Consult a Yamaha deal- – 46 –...
  • Page 52 Clean the spark hand while testing. adjust gap. plug. Does not spark Clean Check the following. O Clogged 9 Fuel line clogging replace. S Engine does not start. 9 Air filter element clogging. Consult a Yamaha dealer. – 47 –...
  • Page 53 – 48 –...
  • Page 54 9 To prevent ELECTRIC SHOCK do not hold spark plug lead with hand while testing. Does not spark. Clean Check the following Clogged 9 Fuel cock clogging replace W Engine does not start. 9 Air cleaner element clogging. Consult a Yamaha dealer. – 49 –...
  • Page 55 E Faulty battery and/or starter motor. Consult a Yamaha dealer. Check engine oil level. Level low Consult a Add engine oil. Yamaha dealer. O Check the spark plug. 9 Type: BPR4ES 9 Gap: 0.7–0.8 mm (0.028–0.031 in) Incorrect Replace or Clean the spark adjust gap.
  • Page 56: Specifications

    SPECIFICATIONS Dimensions MZ175 MZ175 MZ175 Unit With fuel tank model Without fuel tank model With fuel tank model Overall length mm (in) 326 (12.83) 337 (13.27) 317 (12.48) Overall width mm (in) 352 (13.86) 352 (13.86) 361 (14.21) Overall height mm (in) 407 (16.02)
  • Page 57: Engine

    Engine MZ175 MZ175 MZ175 Unit With fuel tank model Without fuel tank model With fuel tank model Type Air cooled 4-stroke Air cooled 4-stroke Air cooled 4-stroke gasoline gasoline gasoline Cylinder arrangement Inclined, 1 cylinder Inclined, 1 cylinder Inclined, 1 cylinder Displacement Bore ×...
  • Page 58 MZ250 MZ300 MZ300 Unit Without fuel tank model With fuel tank model Without fuel tank model Type Air cooled 4-stroke Air cooled 4-stroke Air cooled 4-stroke gasoline gasoline gasoline Cylinder arrangement Inclined, 1 cylinder Inclined, 1 cylinder Inclined, 1 cylinder Displacement Bore ×...
  • Page 59 MZ360 MZ360 Unit Without fuel tank model Without fuel tank model Type Air cooled 4-stroke Air cooled 4-stroke gasoline gasoline Cylinder arrangement Inclined, 1 cylinder Inclined, 1 cylinder Displacement Bore × stroke mm (in) 85.0 × 63.0 85.0 × 63.0 (3.35 ×...
  • Page 60: Consumer Information

    PRI-I.D. NUMBER: Record your Primary I.D., and serial num- bers in the spaces provided, to assist you MODEL in ordering spare parts from a Yamaha dealer. PRI-I.D. Also record and keep these I.D. numbers in a separate place in case your machine SERIAL No.
  • Page 61: Exhaust Emission Control System And Components

    ROAD ENGINES. The acronyms conform to the latest version of the SAE’s recommended practice docu- ment J1930, “Diagnostic Acronyms, Terms, and Definitions For Electrical/Electronic System”. It is recommended that these items be serviced by a Yamaha dealer. – 56 –...

This manual is also suitable for:

Mz200Mz360Mz250Mz300