KAYO MOTOR AY70-2 Service Manual
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KAYO MOTOR AY70-2 Service Manual

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ZHEJIANG KAYO MOTOR CO., LTD.
Model AY70-2
Service Manual
1
WWW.KAYOMOTO.COM

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Summary of Contents for KAYO MOTOR AY70-2

  • Page 1 ZHEJIANG KAYO MOTOR CO., LTD. Model AY70-2 Service Manual WWW.KAYOMOTO.COM...
  • Page 2 ZHEJIANG KAYO MOTOR CO., LTD. Instruction This manual contains detailed information for AY70-2 (ATV), maintenance, adjustments, disassembly, installation, inspection points and specifications Please read the manual carefully and follow the instructions closely when performing inspections and repairs, this will increase the reliability, performance and overall lifespan of the vehicle .
  • Page 3 ZHEJIANG KAYO MOTOR CO., LTD. Content Chapter 1 Maintenance information Chapter 2 Plastics and Body parts Chapter 3 Regular Maintenance and adjustment Chapter 4 Outer parts of engine Chapter 5 Engine internals Appendix Electrical schematic diagram All contents in this manual are subject to improve and update without notice.

  • Page 4: Conversion Table

    ZHEJIANG KAYO MOTOR CO., LTD. Conversion table Unit conversion Item 1kgf/cm =98.0665kPa；1kPa=1000Pa 1PSI=0.0689kgf/cm pressure 1mmHg=133.322Pa=0.133322kPa 1kgf·m=9.80665N·m Torque 1mL=1cm =1cc volume 1L=1000cm Moment 1kgf=9.80665N Length 1in=25.4mm Danger/warning/attention Take the below explanations seriously, it’s important for maintenance, especially important during engine maintenance.

  • Page 5: Service Information

    ZHEJIANG KAYO MOTOR CO., LTD. Service Information 1.1 Warnings 1.2 VIN Number 1.3 Main parameters list 1.4 Maintenance parameters list 1.5 Torque tightening 1.6 Lubricant, sealant 1.7 Cable, hose and wiring diagram 1.1 Safety precautions Safety first 1. Wearing work clothes (coveralls), hat and safety boots suitable for the operation. In some conditions safety glasses, dust masks, gloves and other safety protective supplies are needed to protect you from injury.
  • Page 6 ZHEJIANG KAYO MOTOR CO., LTD. 10. Smear or inject recommended grease in specific places as service manual. 11. Use special tools for disassembly and installation. 12. Ball bearings can be rotated with finger to confirm whether the rotation is flexible and smooth.

  • Page 7: Vin Number

    ZHEJIANG KAYO MOTOR CO., LTD. 0~20 hours: Operate at no more than 3/4 throttle, Do not operate for extended amounts of time with a fixed throttle position. Change gears and vary speeds as necessary. Let the engine cool for 5 to 10 minutes after each hour of operation. Avoid quick acceleration Note: ...
  • Page 8 ZHEJIANG KAYO MOTOR CO., LTD. 1.4 Specifications, Model information Item Brand KAYO Type AY70-2 Name 70cc utility ATV Company ZHEJIANG KAYO MOTOR CO., LTD. ● Dimensions, Vehicle Specifications Dimension（L*W*H）（mm） 1230*800*870 Handlebar height（mm） Handlebar width（mm） Rear height（mm） Ground clearance of seat（mm）...
  • Page 9 ZHEJIANG KAYO MOTOR CO., LTD. Air filter type Filter with sponge filter element Horizontal plunger type （ Jingke PZ19/EPA Carburetor state） Tank volume Clutch type Dry automatic clutch Gearshift method Gear range CVT without reverse gear Shift type R~N~D Forward gear D...
  • Page 10 ZHEJIANG KAYO MOTOR CO., LTD. Cooling device (without) ● Wheel (front and rear wheels) ● Item Standard Limitation Vertical 1.0mm 2.0mm Rim jump Horizontal 1.0mm 1.8mm Residual groove 3.0mm Tyre Air pressure 4.0 PSI Brake system ● Item Standard Limitation Front brake（one...

  • Page 11: Fastener Torque Specifications

    ZHEJIANG KAYO MOTOR CO., LTD. Cylinder + piston + piston ring + crank connecting link （see engine section） ● 1.5 Fastener Torque Specifications Note: When installing threads, please manually attach 2~3 turns of thread first. Torque Specifications chart Bolt Moment...
  • Page 12 ZHEJIANG KAYO MOTOR CO., LTD. Voltage 7~11 regulator ignition coil Fuel tank, fuel tank 7~11 body fuel tank 7~11 parts, switch plastic Pedal 18~25 Reinforced 8~12 pedal Plastic screw 7~11 Screw for ST4.2 headlight and plastic Tightening moment at specified position - engine（see engine section）...
  • Page 13 ZHEJIANG KAYO MOTOR CO., LTD. Oil tube for front brake Main cable Throttle cable Oil tube for rear brake Damper cable WWW.KAYOMOTO.COM...
  • Page 14 ZHEJIANG KAYO MOTOR CO., LTD. Brake cable Stop switch Neutral display Reverse gear display Electrical lock Functional switch Headlight Positive Negative Magneto pole pole connector Voltage regulator Gear indicator WWW.KAYOMOTO.COM...
  • Page 15 ZHEJIANG KAYO MOTOR CO., LTD. Voltage Rear stabilizer light Ignition coil WWW.KAYOMOTO.COM...

  • Page 16: Maintenance Cautions

    ZHEJIANG KAYO MOTOR CO., LTD. 2 Plastic body 2.1 Maintenance warnings 2.2 Installation torque 2.3 Seat, front guard, clay, hood, rear body, left and right guard, plastic pedal, dismounting left and right pedal 2.1 Maintenance cautions Operation cautions When replacing plastics parts, please install new warning labels, stickers and riveted tags to the new plastics.

  • Page 17: Installation

    ZHEJIANG KAYO MOTOR CO., LTD. 2.3.2 Handlebar Disassembly 1. Cut off power first. (disconnect 5. Pull the damper cable as picture battery) shows, then remove it. 2. Cut plastic ties first, then pluck 6. Remove the bolt from accelerator cap functional switch, stop switch and brake to remove the throttle cable.

  • Page 18: Front Bumper

    ZHEJIANG KAYO MOTOR CO., LTD. 2.3.3 Seat Disassembly 1. Press the back of the seat cushion meanwhile open the seat cushion hook 2. Lift the seat cushion tail and pull the seat cushion back Seat cushion hook Installation Take it back in reverse order from disassembly.
  • Page 19 ZHEJIANG KAYO MOTOR CO., LTD. 2.3.5 Plastic Body Disassembly 1. Disconnect all necessary electrical connectors. 2. Disassemble plastic parts fixing bolts1/2，3/4，5/6，7/8，9/10 in order. note （2/4/6/8/10 on the other side） 3. Twist the oil cap, remove the plastic parts. (note: remove the handlebar first before dismount plastic parts.) Oil tank cap 安装...
  • Page 20 ZHEJIANG KAYO MOTOR CO., LTD. Installation Intsall the plastic body in reverse order from disassembly. （note: if the mounting bolt or nut is broken, replace it to same specification in time. After installation, check headlight connector, electric connector, reverse indicator connector etc., in case of looseness or misconnect.)

  • Page 21: Maintenance Information

    ZHEJIANG KAYO MOTOR CO., LTD. Regular maintenance and adjustment 3、 3.1 Maintenance information 3.6 Suspension system 3.2 Maintenance period 3.7 Gear box and fuel system 3.3 Inspection ways 3.8 Throttle check 3.4 Steering column and brake system 3.9 Light device 3.5 Wheel...
  • Page 22 ZHEJIANG KAYO MOTOR CO., LTD. A： adjustment 10 hours or 300km C： clean 20 hours or750km I： inspection per 50 hours or 1500km L： lubrication per 100 hours or 3000km or one 年 R： replace per 200hours or6000km 或 2 years...
  • Page 23 ZHEJIANG KAYO MOTOR CO., LTD. Front wheel： 45kPa （0.45 kgf/ cm2 ） (4.0PSI) rear Tyre pressure wheel: 45kPa （ 0.45kgf/cm ○ ○ 2） (4.0PSI) Crack and damage of wheel ○ ○ ○ Wheel Tyre groove depth and there’s tear Driving...
  • Page 24 ZHEJIANG KAYO MOTOR CO., LTD. 3.4 Steering column and brake system Keep vehicle in steady place and hold handlebar firmly as it shown in the picture to check if it’s shaking. If there is a shaking, check it’s caused by steering column or other parts then repair.
  • Page 25 ZHEJIANG KAYO MOTOR CO., LTD. Front brake pump assembly Check the fluid level at the sight glass on the master cylinder. If brake is below the lower limit, stop using the vehicle immediately and ispect for leaks at master cylinder, hoses, fittings and connections.
  • Page 26 ZHEJIANG KAYO MOTOR CO., LTD. Wheel With the atv on a jack of atv lift. Lift the front wheels off the ground. Push and pull the wheel in and out as shown in the diagram. If there is movement, check torques on hub, steering shafts, spindles.

  • Page 27: Suspension System

    ZHEJIANG KAYO MOTOR CO., LTD. Tire tread Check Tire tread, if tread is less than 3mm, replace it. The inspection of rear wheel is the same as front wheel. Suspension system Keep vehicle in a horizontal position and compress up and down for several times according to the pictures.

  • Page 28: Throttle Check

    ZHEJIANG KAYO MOTOR CO., LTD. Throttle check Check the free stroke of the throttle button. Press the accelerator several times as shown in the diagram, and check the freeplay of the thumb throttle. Under normal circumstances, there is no sticky phenomenon of the accelerator naturally.
  • Page 29 ZHEJIANG KAYO MOTOR CO., LTD. stoke.tight the nut 4, install sleeve back. If the above method is useless, replace a new throttle cable. Speed limiting device adjustment(EPA state is not suitable) Speed limit device is used for restrict throttle opening.

  • Page 30: Engine Systems

    ZHEJIANG KAYO MOTOR CO., LTD. Engine systems 4.3 Air intake system 4.1 Maintenance information 4.4 Exhaust system 4.2 Fuel system 4.5 Disassembly and installation of engine Maintenance information Precautions ● Before performing maintenance, please make sure that the engine is not running, battery is disconnected and that the heated parts have cooled, to avoid injury.

  • Page 31: Fuel System

    ZHEJIANG KAYO MOTOR CO., LTD. Fuel system Gasoline is flammable and explosive. Pay attention to sparks and open flame. Vaporized gasoline may explode if exposed to open flame or sparks , please choose well-ventilated areas away form these hazards when refueling or working on the fuel system and its related components.

  • Page 32: Exhaust System

    ZHEJIANG KAYO MOTOR CO., LTD. Installation Installation shall be in the reverse order of removal. Make hose clamp is in the groove and any vacuum lines are hooked up correctly. Exhaust system Disassembly Disassemble the clamp between muffler and exhaust head pipe, then remove the muffler mounting bolt to remove muffler.
  • Page 33 ZHEJIANG KAYO MOTOR CO., LTD. 1. Remove the engine side cover, then remove chain. 2. Remove the ground lead, gear indicator cable, magneto cable, start motor cable, exhaust pipe, ignition coil cap and gearshift. Gear indicato Exhaust r cable pipe...
  • Page 34 ZHEJIANG KAYO MOTOR CO., LTD. 4. Remove the engine from the right side of vehicle. Installation Installation shall be in the reverse order of removal. Engine Maintenance information Conversion table refers Item Unit conversion 1kgf/cm =98.0665kPa 1kPa=1000Pa Pressure 1mmHg=133.322Pa=0.133322kPa Torque 1kg f ·...
  • Page 35 ZHEJIANG KAYO MOTOR CO., LTD. ventilated. Don't use gasoline as a cleaning fluid ● To avoid burns, do not touch uncooled engine oil, exhaust system parts ● If the fuel, lubrication and exhaust systems are serviced, please check the marker ●...

  • Page 36: Engine Brake-In

    ZHEJIANG KAYO MOTOR CO., LTD. according to the classification of the API SG level or by the superior, if no SAE15W - 40 oil, according to the engine using the environment temperature, as the picture on the right is shown.

  • Page 37: Maintenance

    ZHEJIANG KAYO MOTOR CO., LTD. Engine head displacement label label 5.4 Maintenance Subsidiary maintain times Odometer reading 1000km 4000km 8000km 12000km Items Fuel system Clean Clean Clean Clean Oil filter Clean Clean Clean Clean Control Adjust Adjust, clean Adjust, clean...
  • Page 38 ZHEJIANG KAYO MOTOR CO., LTD. 5.4 Maintenance of Engine Body 5.4.1 Disassemble, assemble and maintain cylinder head Right view of the 125 engine is shown in the figure. Left view of the 125 engine is shown in the figure. Remove the locknut of cylinder head from its holding place WWW.KAYOMOTO.COM...
  • Page 39 ZHEJIANG KAYO MOTOR CO., LTD. Remove cylinder head. Check the state of paper pad. Replace if necessary. Dismantle the fixing bolt of left cover. Remove left cover and inspect the paper pad for damage. Replace if necessary. WWW.KAYOMOTO.COM...
  • Page 40 ZHEJIANG KAYO MOTOR CO., LTD. Dismantle the fixing bolt of right cover. Remove the right cover of cylinder head. Inspect the gasket for damage and replace if necessary. Remove inlet/exhaust valve cap .Check the state of seal ring of valve cap and replace if worn or if reuse is questionable.
  • Page 41 ZHEJIANG KAYO MOTOR CO., LTD. Remove the fixing bolt of timing driven sprocket. Remove the connecting bolt of cylinder head. Remove cylinder head assembly. WWW.KAYOMOTO.COM...
  • Page 42 ZHEJIANG KAYO MOTOR CO., LTD. Remove timing driven sprocket. Inspect the timing driven sprocket for wear and damage. Replace if necessary. Check whether there is excessive carbon deposit in combustion chamber. Clean and replace if necessary Remove the cylinder head. Pour gasoline into inlet/exhaust pipe to inspect the seal condition.
  • Page 43 ZHEJIANG KAYO MOTOR CO., LTD. Remove inlet/exhaust valve spring and check state. Replace necessary. Inspect the oil seal of inlet/exhaust valve for damage. Replace if necessary. Remove the spark plug to clean the carbon. Deposit and dust .Check the spark plug gap and set it to 0.6 to 0.7 if necessary.
  • Page 44 ZHEJIANG KAYO MOTOR CO., LTD. For the troubleshooting of cylinder head ,please refer to the following table Description Damage Form Problem Cause Correction Too much oil dirt or sand Poor heat The engine overheats. Remove the oil dirt or on the cooling fins.
  • Page 45 ZHEJIANG KAYO MOTOR CO., LTD. 5.4.2Disassemble, assemble and maintain cylinder block Dismantle connecting bolt of cylinder block. Remove cylinder gasket and dowel pin to check for wear and damage. Replace if necessary. Dismantle the fixing bolt of timing chain of guide Remove the cylinder block.
  • Page 46 ZHEJIANG KAYO MOTOR CO., LTD. Remove the piston of piston pin to check whether it is damaged. Replace if necessary. Inspect the paper pad for worn or damage .Replace if necessary. Check whether there is residual gasket on cylinder. Clean with gasoline if necessary.
  • Page 47 ZHEJIANG KAYO MOTOR CO., LTD. Check state cylinder inner wall .Replace if worn or if reuse is questionable. Check whether the internal diameter has exceed the limit value. Measure the diameter form upper, middle and lower position. limit value 52.05mm.Replace the cylinder block if it has beyond this value.
  • Page 48 ZHEJIANG KAYO MOTOR CO., LTD. Troubleshooting of the cylinder body, please refer to the following table Maintenance of Cylinder Body Description Damage form Trouble Cause Correction Excessive oil Poor heat The engine overheats Remove the oil dirt or sand on...
  • Page 49 ZHEJIANG KAYO MOTOR CO., LTD. 5.4.3Disassemble, assemble and maintain crankcase Remove the cover of right crankcase half. Check whether the oil seal of starting shaft and seal edge of gearshift lever are worn. Replace if necessary. Check the state of right crankcase cover and replace if necessary.
  • Page 50 ZHEJIANG KAYO MOTOR CO., LTD. Right view of right crankcase half is shown in fig and check the state of right crankcase half. Replace if necessary. Left view of left crankcase is shown below check whether the oil seal of...
  • Page 51 ZHEJIANG KAYO MOTOR CO., LTD. Dismantle fixing bolt of left crankcase cover. Remove the neutral indicator and check the state. Replace if necessary. Dismantle the fixing bolt of magneto stator and remove the stator. Check the condition of left crankcase cover and replace if necessary.
  • Page 52 ZHEJIANG KAYO MOTOR CO., LTD. Troubleshooting of crankcase, please refer to the following table. Trouble Description Problem Compucation Correction Crack in the crank case Oil leakage from the Repair or replace the crankcase crankcase Replace the gasket Oil leakage from the...
  • Page 53 ZHEJIANG KAYO MOTOR CO., LTD. 5.4.4Maintenance of Crankshaft Connecting Rod Disassemble, assemble and maintain crankshaft connecting rod Remove the fixing bolt of crankcase from its holding place. Remove left crankcase half. Take care not to forget the washer of mainshaft and countershaft when removing the left crankcase.
  • Page 54 ZHEJIANG KAYO MOTOR CO., LTD. Remove the connecting rod assembly. Inspect connecting rod bearing for wear and damage. Replace if necessary. Check gap of big-end of connecting rod. Reset the gap if necessary. WWW.KAYOMOTO.COM...
  • Page 55 ZHEJIANG KAYO MOTOR CO., LTD. Check diameter of piston pin using a micrometer. Replace the piston pin if the value is over the maintenance limit value. Check the axial and radial jumping of connecting rod bearing. Replace the conrod if the jumping is large.
  • Page 56 ZHEJIANG KAYO MOTOR CO., LTD. Check whether there is excessive carbon deposit on piston top and groove. Remove if necessary. Check the state of piston and replace if worn or if reuse is questionable. Measure diameter of piston skirt. Replace it if the value is beyond the maintenance limit value.
  • Page 57 ZHEJIANG KAYO MOTOR CO., LTD. For the troubleshooting of crankshaft connecting rod mechanism, please refer to the followingtable. Maintenance of Crankshaft Connecting Rod Mechanism Description Damage from Trouble Cause Correction The engine over- heats Carbon deposit on piston Remove the carbon...
  • Page 58 ZHEJIANG KAYO MOTOR CO., LTD. The piston ring is over The piston ring opening gap or the worn side gap is too wide Insufficient elasticity of It is impossible to tight the piston piston ring ring and the cylinder properly...
  • Page 59 ZHEJIANG KAYO MOTOR CO., LTD. Remove the rocker arm of inlet/exhaust valve and check the state Remove the timing cam, rocker arm , rocker arm shaft to inspect for worn.Replace if necessary. Remove the circlip of inlet and exhaust valve. Remove inlet vale stem and exhaust valve stem take care and don`t miss the valve clip.
  • Page 60 ZHEJIANG KAYO MOTOR CO., LTD. Remove the spring of inlet and exhaust valve to inspect for wear and damage. Note: when assemble the valve spring , make sure its dense end downward. Check the external diameter of valve stem using a verier clipper. Replace the valve stem if the valve is beyond the maintenance limit valve.
  • Page 61 ZHEJIANG KAYO MOTOR CO., LTD. Check whether the valve stem is distored. Replace if necessary. Inspect the timing camshaft bearing for wear and check the state of camshaft. Replace if necessary. Check the gap of rocker arm shaft and rocker arm. Replace the rocker arm shaft and rocker arm if the gap is large.
  • Page 62 ZHEJIANG KAYO MOTOR CO., LTD. Check the external diameter of rocker arm using a micrometer. Replace the rocker arm shaft if the valve is beyond the maintenance limit valve. Remove the guide wheel of timing chain to inspect for wear and damage. Replace if necessary.
  • Page 63 ZHEJIANG KAYO MOTOR CO., LTD. Remove the timing tensioner arm to inspect for wear and damage. Replace if necessary. Remove the oil tube and spring and check the state. Replace if necessary. Remove the small timing chain and check the state.
  • Page 64 ZHEJIANG KAYO MOTOR CO., LTD. Adjust valve clearance of front cylinder. Turn magnetic rotor counterclockwise to make piston locate at top dead center and make T mark aimed to the mark of left crankcase cover. Check whether the O-mark on cam sprocket is aimed to the gap of cylinder head.
  • Page 65 ZHEJIANG KAYO MOTOR CO., LTD. For the troubleshooting of engine distribution mechanism, please refer to the following table Maintenance of Distribution Mechanism Descriptions Damage form Trouble Cause Correction Valve oil seal The edge of valve oil seal Thick blue and white fume form Replace the is worn, age or damage.
  • Page 66 ZHEJIANG KAYO MOTOR CO., LTD. Carbon deposit It is impossible to fit the The engine starts hard or fails to Remove the carbon working surface valve and the valve seat start. Insufficient engine output; deposit tightly. Engine speed changes during idle...
  • Page 67 ZHEJIANG KAYO MOTOR CO., LTD. 5.6 Disassemble, assemble and maintain carburetor EPA model is not adjustable here ） Dismantle the fixing bolt of carburetor and circlip of air cleaner. Remove the carburetor .Remove and clean throttle Clean the carburetor as follows: 。Remove the dirt...
  • Page 68 ZHEJIANG KAYO MOTOR CO., LTD. Remove the throttle and oil needle and check the condition replace if necessary. Check the state of float case and replace as necessary. Adjust the height of float case by moving the float up or down.
  • Page 69 ZHEJIANG KAYO MOTOR CO., LTD. Remove the idle jet and check for plugged. Clean the jet with compressed air if necessary Dismantle the mixture adjustment screw and inspect for worn. Replace if necessary.Adjust mixture screw of carburetor as the following. Standard:...
  • Page 70 ZHEJIANG KAYO MOTOR CO., LTD. 5.7 Maintenance of Intake/Exhaust System 5.7.1 Disassemble, assemble and maintain intake system Remove air filter clasp Remove the air filter Remove the air filter to clean shell dust,and open the filter to clean. As the filter is made of paper,so it can not be cleaned. Please replace the new air filter.
  • Page 71 ZHEJIANG KAYO MOTOR CO., LTD. 5.8 Disassemble, assemble and maintain exhaust system Dismantle locknut of muffler Dismantle suspension bolt of muffler to check whether the suspension support is damaged. Repair or or replace if necessary. Remove the muffler to inspect for broken and damage.
  • Page 72 ZHEJIANG KAYO MOTOR CO., LTD. For the troubleshooting or the exhaust muffler, please refer to the following table. Maintenance of Exhaust Muffler Description Damage form Trouble Cause Correction Exhaust pipe leakage Exhaust pipe gasket Engine exhaust noise is Replace exhaust pipe...
  • Page 73 ZHEJIANG KAYO MOTOR CO., LTD. Dismantle the fixing bolt of air pump and check the state of air pump. Replace the air pump if it is worn or if reuse is questionable. Remove the secondary inlet air cleaner and inspect for wear and damage.
  • Page 74 ZHEJIANG KAYO MOTOR CO., LTD. Poor combustion muffler too much carbon deposit Emission fails to Remove exhaust on muffler exhaust meet the standard and clean 5.10 Disassemble, assemble, maintain and manage the electric starter Remove the retaining bolt from the left crankcase cover Remove the mounting bolt.
  • Page 75 ZHEJIANG KAYO MOTOR CO., LTD. Remove washer and check condition. Replace if worn or reused. Remove the magnetic stator fixing bolt and trigger bolt Check stator state with multimeter. if worn or reused, replace the parts with new ones WWW.KAYOMOTO.COM...
  • Page 76 ZHEJIANG KAYO MOTOR CO., LTD. Remove rotor retaining nut Remove the rotor with a special tool Remove the rotor and check for demagnetization. Replace if necessary Remove the overclutch retaining bolt. WWW.KAYOMOTO.COM...
  • Page 77 ZHEJIANG KAYO MOTOR CO., LTD. Remove clutch. Inspect clutch seats, rollers and springs for wear and damage. Replace if necessary. Check for wear and damage of drive sprocket and drive gear and replace if necessary Remove the sprocket wheel press board Remove the tension band of the clutch and check its condition.
  • Page 78 ZHEJIANG KAYO MOTOR CO., LTD. Remove the snap ring of the starting motor sprocket Remove the drive sprocket and chain Remove starter motor retaining bolts. Remove the starting motor. WWW.KAYOMOTO.COM...
  • Page 79 ZHEJIANG KAYO MOTOR CO., LTD. Check whether the starter windings are damaged. Replace if necessary. Remove oil separation disc and check condition. Replace if necessary. Check whether the oil seal is worn. Replace if necessary. Remove the seal ring.Check the Condition of the oil seal ring and replace it is worn.
  • Page 80 ZHEJIANG KAYO MOTOR CO., LTD. For the troubleshooting of engine electric starter, please refer to the following table. Maintenance of Electric Starter Description Damage form Trouble Cause Correction Starter motor has insufficient Carbon brush is over worn. rotation force or it is out of work.

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