![Fault location](/images/new-backgrounds/95638/9563835x1.webp)
Fault location
Fault | System |
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Engine not starting or | Ignition system |
| Ignition spark O.K. | Fault in fuel supply or compression system, mechanical | |||||||||||
with difficulty |
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| defect |
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| No ignition spark |
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| or connector defective, ignition module faulty |
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| Fuel supply |
| Fuel tank filled |
| Incorrect choke position, carburetor defective, fuel supply | ||||||||||
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| line bent or blocked, fuel dirty. |
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| Compression |
| No compression when | Cylinder bottom gasket defective, crankshaft seals damaged, | |||||||||||
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| pulled over |
| cylinder or piston rings defective or improper sealing of spark | ||||||||
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| plug |
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| Mechanical fault |
| Starter not engaging | Broken starter spring, broken parts inside of the engine | |||||||||||
Warm start problems |
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| Tank filled ignition spark | Carburetor contaminated, have it cleaned |
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Engine starts but dies | Fuel supply |
| Tank filled |
| Incorrect idling adjustment, carburetor contaminated | ||||||||||
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| Fuel tank vent defective, fuel supply line interrupted, cable or | ||||||
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Insufficient performance | Several systems may |
| Engine idling poor | Air filter contaminated, carburetor contaminated, muffler | |||||||||||
| simultaneously be |
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| clogged, exhaust duct in the cylinder clogged |
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Operating time |
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| Before | After |
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| Shutdown/ | Corre- | ||
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| Daily (10h) |
| 30h | 50h | 200h | sponding | |||||
Item |
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| operation | lubrication |
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Engine oil |
| Inspect/clean |
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| 10 |
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| Replace |
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| *1 |
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| 15 | |
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Tightening parts (bolt, nut) |
| Inspect |
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| 17 |
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Fuel tank |
| Clean/inspect |
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| – |
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| Drain fuel |
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| *3 | 17 | |
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Throttle lever |
| Check function |
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Stop switch |
| Check function |
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| 12 |
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| Inspect/adjust |
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| 13 | |
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Air cleaner |
| Clean |
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| 16 |
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Ignition plug |
| Inspect |
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| 16 |
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Cooling air duct |
| Clean/inspect |
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| 17 |
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Fuel pipe |
| Inspect |
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| 17 |
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| Replace |
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Fuel filter |
| Clean/replace |
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| 17 |
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Clearance between air intake | Adjust |
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| *2 |
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valve and air discharge valve |
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Oil tube |
| Inspect |
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| *2 |
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Engine overhaul |
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| *2 |
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Carburetor |
| Drain fuel |
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| *3 | 17 |
*1 Perform initial replacement after 20h operation.
*2 For the 200 operating hour inspection, request Authorized Service Agent or a machine shop. *3 After emptying the fuel tank, continue to run the engine and drain fuel in the carburetor.
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