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Troubleshooting guide (continued), No yes no yes no yes yes no yes, What to check possible cause remedy – Shindaiwa 62891-94311 User Manual

Page 19

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19

NO

NO

YES

NO

YES

NO

YES

YES

NO

YES

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.

The plug is damaged internally or of the wrong size.

What To Check

Possible Cause

Remedy

ENGINE DOES NOT START

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 filter and/or vent.

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.

Consult with an authorized servicing dealer.

Tighten and re-test.

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 2-cycle mixing oil or with an

equivalent high quality 2-cycle mixing oil.

Replace fuel filter or vent as required. Restart.

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 0.6mm-0.7mm.

Restart.
Replace the plug. See “Specifications” for the correct plug

for your unit. Restart.

Is the engine

overheating?

Engine is rough at all

speeds. May also have

black smoke and/or

unburned fuel at the

exhaust.

What To Check

Possible Cause

Remedy

LOW POWER OUTPUT

Engine is knocking.

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.

Overheating condition
Improper fuel

Carbon deposits in the combustion chamber.

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.

Consult with an authorized servicing dealer.

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 2-cycle

mixing oil or with an equivalent high quality 2-cycle mixing oil.

Clean, repair or replace as necessary.

Consult with an authorized servicing dealer.

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.

See above.
Check fuel octane rating; check for presence of

alcohol in the fuel. Refuel as necessary.

Troubleshooting Guide (continued)