18
NO
Troubleshooting Guide
Faulty recoil starter.
Fluid in the crankcase or internal damage.
Loose spark plug.
Excess wear on cylinder, piston, rings.
Fuel incorrect, stale, or contaminated;
mixture incorrect.
Check for clogged fuel filter and/or vent.
The ignition switch is in “O” (OFF) position.
Faulty ignition ground or 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 servicing dealer.
Tighten and re-test.
Consult with an authorized servicing dealer.
Refill with fresh fuel of the correct mixture (gasoline
and Shindaiwa 2-cycle Mixing Oil, at a 50:1 ratio).
See page 10.
Clean or replace as required. Restart.
Move switch to “I” (ON) position and re-start.
Consult with an authorized servicing dealer.
Crank the engine with the plug removed, replace the
plug, and restart.
Clean and gap the spark plug to 0.024 inch (0.6mm).
Restart.
Replace the plug with a NGK BMR6A.
NO
YES
What To Check
Possible Cause
Remedy
ENGINE DOES NOT START
NO
YES
NO
YES
YES
NO
YES
Is the engine overheating?
Engine is rough at all
speeds. May also have black
smoke and/or unburned
fuel at the exhaust.
Operator is overworking the machine.
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.
Clogged air cleaner.
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.
Shorten trimmer line. Cut at a slower rate.
Consult with an authorized servicing dealer.
Refill with fresh fuel of the correct mixture (gasoline
and Shindaiwa 2-cycle Mixing Oil, at a 50:1 ratio).
See page 10.
Clean, repair or replace as necessary.
Consult with an authorized servicing dealer.
Service the air cleaner element.
Tighten or replace. Replace the plug with a
NGK BMR6A.
Repair or replace fuel filter and/or fuel line.
Replace the fuel.
Consult with an authorized servicing dealer.
See above.
Check fuel octane rating; check for presence of
alcohol in the fuel. See page 10.
Refuel as necessary.
Consult with an authorized servicing dealer.
What To Check
Possible Cause
Remedy
LOW POWER OUTPUT
Engine is knocking.
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.
