Shindaiwa GP344 Owner's Manual
17
Troubleshooting Guide
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Does the engine crank?
Good compression?
Does the tank contain fresh
fuel of the proper grade?
Is fuel visible and moving
in the return line when
priming?
Is there spark at the spark
plug wire terminal?
Check the spark plug.
Faulty recoil starter.
Fluid in the crankcase.
Internal damage.
Loose spark plug.
Excess wear on cylinder,
piston, rings.
Fuel incorrect, stale, or
contaminated; mixture incorrect.
Check for clogged fuel fi lter
and/or vent.
Priming pump not functioning properly.
The ignition switch is in
“O” (OFF) position.
Shorted ignition ground.
Faulty ignition unit.
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.
Consult with an authorized Shindaiwa servicing dealer.
Tighten and re-test.
Consult with an authorized Shindaiwa
servicing dealer.
Refi ll with fresh, clean unleaded gasoline with a pump octane
of 89 or higher mixed with an air cooled engine oil that
meets or exceeds ISO-L-EGD and/or JASO FD classifi ed oils
at 50:1 gasoline/oil ratio.
Replace fuel fi lter or vent as required.
Re-start.
Consult with an authorized Shindaiwa
servicing dealer.
Move switch to “I” (ON) position
and re-start.
Consult with an authorized Shindaiwa
servicing dealer.
See "Starting a Flooded Engine"
Clean and gap the spark plug. Check the Specifi cations
section for the correct plug and gap for your unit. Restart.
Replace the spark plug. Check the Specifi cations section for
the correct plug and gap for your unit. Restart.
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YES
What To Check
Possible Cause
Remedy
ENGINE dOES NOT START
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YES
YES
YES
Is the engine overheating?
Engine is rough at all
speeds. May also have
black smoke and/or
unburned fuel at the
exhaust.
Carburetor mixture is too lean.
Improper fuel ratio.
Fan, fan cover, cylinder fi ns dirty
or damaged.
Carbon deposits on the piston or
in the muffl er.
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.
Overheating condition.
Improper fuel.
Carbon deposits in the
combustion chamber.
Consult with an authorized Shindaiwa
servicing dealer.
Refi ll with fresh, clean unleaded gasoline with a pump octane
of 89 or higher mixed with an air cooled engine oil that meets
or exceeds ISO-L-EGD and/or JASO FD classifi ed oils at 50:1
gasoline/oil ratio.
Clean, repair or replace as necessary.
Consult with an authorized Shindaiwa
servicing dealer.
Service the air cleaner element.
Tighten or replace the spark plug.
Check the Specifi cations section for the correct plug and gap
for your unit.
Repair or replace fuel fi lter and/or
fuel line.
Refi ll with fresh, clean unleaded gasoline with a pump octane
of 89 or higher mixed with an air cooled engine oil that meets
or exceeds ISO-L-EGD and/or JASO FD classifi ed oils at 50:1
gasoline/oil ratio.
Consult with an authorized Shindaiwa servicing dealer.
Consult with an authorized Shindaiwa
servicing dealer.
Refi ll with fresh, clean unleaded gasoline with a pump octane
of 89 or higher mixed with an air cooled engine oil that meets
or exceeds ISO-L-EGD and/or JASO FD classifi ed oils at 50:1
gasoline/oil ratio.
Consult with an authorized Shindaiwa
servicing dealer.
What To Check
Possible Cause
Remedy
LOW POWER OUTPUT
Engine is knocking.
Troubleshooting Guide (continued)