Troubleshooting Guide (continued)
ENGINE DOES NOT START
What To Check
Does the engine crank?
YES
Good compression?
YES
Does the tank contain fresh fuel of the proper grade?
YES
Is fuel visible and moving in the return line when priming?
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| Possible Cause |
| NO |
| Faulty recoil starter. |
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| Fluid in the crankcase. |
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| Internal damage. |
| NO |
| Loose spark plug. |
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| NO |
| Excess wear on cylinder, piston, rings. |
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| Fuel incorrect, stale, or contaminated; mixture | |
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| incorrect. |
| NO |
| Check for clogged fuel filter and/or vent. |
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Remedy
Consult with an authorized servicing dealer.
Tighten and
Consult with an authorized servicing dealer.
Refill with fresh, clean unleaded gasoline with a pump octane of 87 or higher mixed with 50:1 Shindaiwa Premium
Replace fuel filter or vent as required. Restart.
YES
Is there spark at the spark plug wire terminal?
YES
Check the spark plug.
The ignition switch is in “O” (OFF) position.
| NO | Shorted ignition ground. |
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| Faulty ignition unit. |
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If the plug is wet, excess fuel may be in the cylinder.
The plug is fouled or improperly gapped.
The plug is damaged internally or of the wrong size.
Move switch to “I” (ON) position and restart.
Consult with an authorized servicing dealer.
Crank the engine with the plug removed, reinstall the plug, and restart.
Clean and regap the plug to
Replace the plug. See “Specifications” for the correct plug for your unit. Restart.
LOW POWER OUTPUT
What To Check | Possible Cause | Remedy |
Is the engine overheating?
Operator is overworking the unit.
Carburetor mixture is too lean.
Improper fuel ratio.
Fan, fan cover, cylinder fins dirty or damaged.
Carbon deposits on the piston or in the muffler.
Cut at a slower rate.
Consult with an authorized servicing dealer.
Refill with fresh, clean unleaded gasoline with a pump octane of 87 or higher mixed with 50:1 Shindaiwa Premium
Clean, repair or replace as necessary.
Consult with an authorized servicing dealer.
Engine is rough at all speeds. May also have black smoke and/or unburned fuel at the exhaust.
Clogged air cleaner element. Loose or damaged spark plug.
Air leakage or clogged fuel line.
Water in the fuel.
Piston seizure.
Faulty carburetor and/or diaphragm.
Clean or replace the air filter.
Tighten or replace the plug. See “Specifications” for the correct plug for your unit. Restart.
Repair or replace fuel filter and/or fuel line.
Refill with fresh fuel/oil mixture.
Consult with an authorized servicing dealer.
Engine is knocking.
Overheating condition
Improper fuel
Carbon deposits in the combustion chamber.
See above.
Check fuel octane rating; check for presence of alcohol in the fuel. Refuel as necessary.
Consult with an authorized servicing dealer.
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