Yamaha MZ300 Owner'S Manual Download Page 6

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SAFETY INFORMATION

Do not allow children to operate the multi-purpose

engine.

Exhaust fumes are poisonous

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.

Do not place any obstacles on the multi-purpose

engine.

Fuel is highly flammable and poisonous

Always turn off the engine when refuelling.

Never refuel while smoking or in the vicinity of an

open flame.

Take care not to spill any fuel on the engine or

muffler when refueling.

Do not leave the multi-purpose engine inside the

vehicle or in the trunk.

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.

7VB-F-10_E0.indd 1

2012/08/10 14:04:55

Summary of Contents for MZ300

Page 1: ...Multi Purpose Engine LIT 19626 01 80 7VB F8199 10 PRINTED IN CHINA 2012 08 1 E MZ300 OWNER S MANUAL Read this manual carefully before operating this machine 7VB F 10_hyoshi indd 1 2 2012 08 10 14 05 45 ...

Page 2: ...Read this manual carefully before operating this machine This manual should stay with this machine if it is sold 7VB F 10_hyoshi indd 3 4 2012 08 10 14 05 45 ...

Page 3: ...stions regarding the operation or maintenance of your machine please consult a Yamaha dealer MZ300 OWNER S MANUAL 2012 by Yamaha Motor Corporation U S A 1st Edition August 2012 All rights reserved Any reprinting or unauthorized use without the written permission of Yamaha Motor Corporation U S A is expressly prohibited Printed in China P N LIT 19626 01 80 7VB F 10_E0 indd 1 2012 08 10 14 04 54 ...

Page 4: ...s key information to make procedures easier or clearer WARNING PLEASE READ AND UNDERSTAND THIS MANUAL COMPLETELY BEFORE OPERATING THE MACHINE TIP 9 Yamaha continually seeks advance ments in product design and quality Therefore while this manual contains the most current product information available at the time of printing there may be minor discrepancies between your engine and this manual If the...

Page 5: ...9 Carburetor adjustment 20 Engine oil replacement 20 Air filter 22 Spark arrester 23 Fuel cock 25 Fuel tank filter 26 STORAGE 27 Drain the fuel 27 Engine 29 TROUBLESHOOTING 30 Engine won t start 30 SPECIFICATIONS 32 Dimensions 32 Engine 32 CONSUMER INFORMATION 33 Identification number records 33 Machine identification 33 EXHAUST EMISSION CONTROL SYSTEM AND COMPONENTS 34 Yamaha Motor Corporation US...

Page 6: ... flammable and poisonous 9 Always turn off the engine when refuelling 9 Never refuel while smoking or in the vicinity of an open flame 9 Take care not to spill any fuel on the engine or muffler when refueling 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 fu...

Page 7: ...s or children are not likely to touch the machine 9 Avoid placing any flammable materials near the exhaust outlet during operation 9 When operating or transporting the machine be sure it is kept upright If it tilts fuel may leak from the carburetor or fuel tank 9 When refueling do not place the fuel tank cap near the muffler 9 Take care not to spill fuel 7VB F 10_E0 indd 2 2012 08 10 14 04 55 ...

Page 8: ...e machine with wet hands or elec trical shock will occur 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 7VB F 10_E0 indd 3 2012 08 10 14 04 56 ...

Page 9: ... LABELS Please read the following labels carefully before oper ating this machine TIP Maintain or replace safety and instruction labels as necessary 1 MZ300A 7CN F4162 40 1 2 3 4 2 MZ300A 7VB F 10_E0 indd 4 2012 08 10 14 04 57 ...

Page 10: ...m meets all re Ce système d allumage respecte toutes les exigences sur le matériel brouilleur du Canada 7CC H2377 50 quirements of the Canadian Interference Causing Equipment Regulations 2 MZ300K 7VB F 10_E0 indd 5 2012 08 10 14 04 57 ...

Page 11: ...er 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 r y t w q e 7VB F 10_E0 indd 6 2012 08 10 14 04 58 ...

Page 12: ...e switch to ON and then pull the recoil starter If the oil warning light flickers for a few seconds the engine oil is insufficient Add oil and restart CONTROL FUNCTION Engine switch The engine switch controls the ignition system 1 ON Ignition circuit is switched on The engine can be started 2 OFF Ignition circuit is switched off The engine will not run Fuel tank cap Remove the fuel tank cap by tur...

Page 13: ...to this position when the engine is not running Recoil starter handle Used to start the engine 1 Recoil starter handle NOTICE 9 Pull the recoil starter handle straight 9 Return the recoil starter handle slowly 9 Do not touch the recoil starter handle while the multi purpose engine is operating TIP Pull the recoil starter handle after turning the engine switch to ON Choke lever Starting a cold engi...

Page 14: ... 9 1 2 Throttle lever Throttle lever controls the engine speed 1 Lever position to idle the engine Decrease engine speed 2 Increase engine speed 7VB F 10_E0 indd 9 2012 08 10 14 04 59 ...

Page 15: ...ine on a level surface 3 Remove the fuel tank cap 4 Check the fuel level 5 If low fill the tank with fuel NOTICE 9 Immediately wipe off spilled fuel with a clean dry soft cloth since fuel may deteriorate painted surfaces or plastic parts 9 Use only unleaded gasoline The use of leaded gasoline will cause severe damage to internal engine parts TIP If filled beyond the red line fuel may mix with the ...

Page 16: ...k capacity Total 5 5 L 1 45 US gal 1 21 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 7VB F 10_E0 indd 11 2012 08 10 14 04 59 ...

Page 17: ...il filler cap 3 Fill the specified amount of the recommended engine oil 1 0 C A YAMALUBE 4 10W 40 D SAE 10W C SAE 20 B SAE 30 32 F 25 C 80 F Recommended engine oil AYAMALUBE 4 10W 40 SAE 10W 30 or 10W 40 BSAE 30 CSAE 20 DSAE 10W Recommended engine oil grade API Service SE type or higher Engine oil quantity 1 0 L 1 06 US qt 0 88 Imp qt 4 Check the oil level of the oil filler hole 2 Correct level 5 ...

Page 18: ...sed TIP Pre operation checks should be made each time the multi purpose engine is used Pre operation check Fuel See page 10 9 Check fuel level in fuel tank 9 Refuel if necessary Fuel line 9 Check fuel hose for cracks or damage 9 Replace if necessary Engine oil See page 12 9 Check oil level in engine 9 If necessary add recommended oil to specified level 9 Check multi purpose engine for oil leakage ...

Page 19: ... has been shipped with out engine oil Do not start the engine until you have filled it with the sufficient engine oil 1 2 Starting the engine 1 Turn the fuel cock lever to ON 1 ON 2 Pull the choke lever fully out 2 Choke lever TIP The choke is not required to start a warm engine Push the choke lever to the original position 3 Move the throttle lever slightly to 7VB F 10_E0 indd 14 2012 08 10 14 05...

Page 20: ...e engine does not stop when the choke lever is returned to the original position 4 Original position 7 Set the throttle lever in desired position 5 Decrease engine speed 6 Increase engine speed 3 5 Pull the recoil starter slowly until it is engaged then pull it briskly 7VB F 10_E0 indd 15 2012 08 10 14 05 01 ...

Page 21: ... 16 1 2 2 Stopping the engine 1 Move the throttle lever fully to 2 Turn the engine switch to OFF 1 OFF 3 Turn the fuel cock lever to OFF 2 OFF 7VB F 10_E0 indd 16 2012 08 10 14 05 01 ...

Page 22: ...e only Yamaha specified genuine parts for replacement Ask an authorized Yamaha dealer for further information Item Routine Pre operation check Initial Every 1 month or 20 Hrs 3 months or 50 Hrs 6 months or 100 Hrs 12 months or 300 Hrs Spark plug Check condition 1 Clean and replace if necessary Fuel Check fuel level and leakage 1 Fuel hose Check fuel hose for cracks or damage 1 Replace if necessary...

Page 23: ...e Check and adjust when engine is cold Idle speed Check and adjust idle speed Recoil starter Check recoil starter for damage Fittings fasteners Check all fittings and fasteners Correct if necessary The point where abnormality was recognized by use 1 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 a...

Page 24: ...d spark plug BPR4ES NGK Spark plug gap 0 7 0 8 mm 0 028 0 031 in TIP The spark plug gap should be measured with a wire thickness gauge and if necessary adjusted to specifi cation 4 Install the spark plug and then tighten it Spark plug tightening torque 20 Nm 2 0 m kgf 14 ft lbf TIP If a torque wrench is not available when installing a spark plug a good estimate of the correct torque is 1 4 1 2 tur...

Page 25: ...lti purpose engine on a level surface and warm up the engine for several minutes Then stop the engine and turn the fuel cock lever to OFF 2 Remove the oil filler cap 1 Oil filler cap 3 Place an oil pan under the engine Remove the oil drain bolt and gasket so that the oil can be com pletely drained 2 Oil drain bolt 3 Gasket 4 Check the oil drain bolt oil filler cap and O ring Replace them if damage...

Page 26: ...C A YAMALUBE 4 10W 40 D SAE 10W C SAE 20 B SAE 30 32 F 25 C 80 F Recommended engine oil AYAMALUBE 4 10W 40 SAE 10W 30 or 10W 40 BSAE 30 CSAE 20 DSAE 10W Recommended engine oil grade API Service SE type or higher Engine oil quantity 1 0 L 1 06 US qt 0 88 Imp qt 7 Install the oil filler cap 7VB F 10_E0 indd 21 2012 08 10 14 05 02 ...

Page 27: ...ement should be wet but not dripping Recommended oil Foam air filter oil or engine oil see page 21 NOTICE Do not wring out the foam element when squeez ing it This could cause it to tear 5 Insert the foam element into the air filter case TIP Be sure the foam element sealing surface matches the air filter case so there is no air leak NOTICE The engine should never run without the foam ele ment exce...

Page 28: ...ing use the wire brush lightly to avoid damaging or scratching of the spark arrester 5 Check the spark arrester Replace it if damaged 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 Remove the screw 1 Screw 1 7VB F 10_E0 in...

Page 29: ...Install the spark arrester TIP Align the spark arrester lump with the hole in the muf fler pipe 3 Spark arrester lump 4 Hole 7 Install the screw and then tighten the screw 7VB F 10_E0 indd 24 2012 08 10 14 05 03 ...

Page 30: ... Remove the fuel cock cup gasket and fuel strain er 2 Fuel cock cup 3 Gasket 4 Fuel strainer 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 4 1 1 3 2 7VB F 10_E0 indd 25 2012 08 10 14 05 03 ...

Page 31: ...emove 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 7VB F 10_E0 indd 26 2012 08 10 14 05 03 ...

Page 32: ...an approved gasoline container using a commercially available hand siphon Then install the fuel tank filter and fuel tank cap WARNING Fuel is highly flammable and poisonous Check SAFETY INFORMATION See page 1 carefully NOTICE Immediately wipe off spilled fuel with a clean dry soft cloth since fuel may deteriorate painted sur faces or plastic parts 3 Turn the engine switch to ON 2 ON 4 Turn the fue...

Page 33: ... tank 6 Drain the fuel from the carburetor by loosening the drain screw on the carburetor float chamber 4 Drain Screw 7 Turn the engine switch to OFF 8 Turn the fuel cock lever to OFF 9 Tighten the drain screw 10 Tighten further if any screws bolts and nuts are loose 11 Store the multi purpose engine in a dry well ven tilated place with the cover placed over it 7VB F 10_E0 indd 28 2012 08 10 14 05...

Page 34: ...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 Clean exterior of the multi purpose engine and apply a rust inhibitor 4 Store the multi purpose engine in a dry well ven tilated place with the cover placed over it 5 The multi purpose engine must remain in a verti c...

Page 35: ...rical systems 2 Engine switch to ON and pull the recoil starter 2 ON 2 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 er 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 7VB F 10_E0 indd 30 2012 08 10 ...

Page 36: ...he following 9 Fuel line clogging 9 Air filter element clogging O Clogged P OK Q Clean or replace R OK S Engine does not start H Pull the recoil starter and check the spark plug for spark strength See WARNING w 9 To prevent FIRE HAZARDS be sure fuel is not present in the spark plug area 9 To prevent FIRE HAZARDS be sure to place the spark plug as far away as possible from the spark plug hole and c...

Page 37: ...ed gasoline Unleaded gasoline Fuel tank capacity L US gal Imp gal 5 5 1 45 1 2 Engine oil quantity L US qt Imp qt 1 0 1 06 0 88 1 0 1 06 0 88 Ignition system TCI TCI Spark plug Type BPR4ES NGK BPR4ES NGK Gap mm in 0 7 0 8 0 028 0 031 0 7 0 8 0 028 0 031 Net output kW PS r min 7 0 9 5 3600 7 0 9 5 3600 The power rating of the engine indicated in the SPECIFICATIONS is the net power output tested on ...

Page 38: ...e your machine is stolen PRI I D NUMBER PRI I D CODE SERIAL No MODEL CONSUMER INFORMATION Machine identification The machine serial number is stamped in the location as shown TIP The first three digits of these numbers are for model identification the remaining dig its are the unit production number Keep a record of these numbers for reference when ordering parts from a Yamaha dealer 7VB F 10_E0 i...

Page 39: ...RK The above items and the corresponding acronyms are provided in accordance with U S EPA REGULATIONS FOR NEW NONROAD SPARK IGNITION NONHANDHELD ENGINES and the CALIFORNIA REGULATIONS FOR 1995 AND LATER SMALL OFF 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 ...

Page 40: ...aha due to faulty workmanship or material from the factory Parts used in warranty repairs will be warrantied for the balance of the product s warranty period All parts replaced under warranty become property of Yamaha Motor Corporation USA Emissions warranty emissions related components will be warrantied for 3 years regardless of commercial or non commercial use General Exclusions from this warra...

Page 41: ...ticular purpose which exceed the obligation and time limits stated in this warranty are hereby disclaimed by Yamaha Motor Corporation USA and excluded from this warranty Some states do not allow limitations on how long an implied warranty lasts so the above limitation may not apply to you Also excluded from this warranty are any incidental or consequential damages including loss of use Some states...

Page 42: ... of this section MANUFACTURER S WARRANTY COVERAGE This evaporative emission control system is warranted for two years If any evaporative emission related part on your equipment is defective the part will be repaired or replaced by Yamaha OWNER S WARRANTY RESPONSIBILLITIES As the outdoor power equipment owner you are responsible for the performance of the required maintenance listed in your owner s...

Page 43: ...ions related part on your engine is defective the part will be repaired or replaced by Yamaha OWNER S WARRANTY RESPONSIBILITIES As the SORE engine owner you are responsible for the performance of the required maintenance listed in your owner s manual Yamaha recommends that you retain all receipts covering maintenance on your SORE engine but Yamaha cannot deny warranty solely for the lack of receip...

Page 44: ...ust be warranted for the warranty period defined in Subsection b 2 A statement in such written instructions to the effect of repair or replace as necessary will not reduce the period of warranty coverage Any such part repaired or replaced under warranty must be warranted for the remaining warranty period 3 Any warranted part that is scheduled for replacement as required maintenance in the written ...

Page 45: ... 11 The manufacturer issuing the warranty shall provide any documents that describe that manufacturer s warranty procedures or policies within five working days of request by the Air Resources Board WARRANTED PARTS INCLUDE the following 1 Fuel Metering System Carburetor and internal parts or fuel injection system Air fuel ratio feedback and control system Cold start enrichment system 2 Air Inducti...

Page 46: ...lable for inspection by an authorized Yamaha dealer OWNER S RESPONSIBILITY The owner of the SORE engine is responsible for the performance of required maintenance see your Owner s Manual Receipts and maintenance records covering the performance of regular maintenance should be retained in the event questions arise concerning maintenance The receipts should be transferred to each subsequent owner o...

Page 47: ...quired maintenance which causes failure of a warranted part may constitute abuse and or improper service thereby invalidating warranty liability hereunder This warranty does not cover damage resulting from accidents acts of nature or other events or occurrences beyond the control of Yamaha Yamaha Motor Corporation U S A expressly disclaims responsibility for any and all consequential damages such ...

Page 48: ...7VB F 10_E0 indd 43 2012 08 10 14 05 05 ...

Page 49: ...Read this manual carefully before operating this machine This manual should stay with this machine if it is sold 7VB F 10_hyoshi indd 3 4 2012 08 10 14 05 45 ...

Page 50: ...Multi Purpose Engine LIT 19626 01 80 7VB F8199 10 PRINTED IN CHINA 2012 08 1 E MZ300 OWNER S MANUAL Read this manual carefully before operating this machine 7VB F 10_hyoshi indd 1 2 2012 08 10 14 05 45 ...

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