Shindaiwa ES726, Operator'S Manual

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Troubleshooting Guide (Engine)
ENGINE DOES NOT START
Does the engine
crank?
Faulty recoil starter.
Fluid in the crankcase.
Internal damage.
Consult with an authorized servicing dealer.
NO
Good
compression?
Loose spark plug.
Excess wear on cylinder, piston, rings.
Tighten and re-test.
Consult with an authorized servicing dealer.
NO
YES
Does the tank
contain fresh
fuel of the
proper grade?
Re-fill with fresh fuel of the correct mixture
(gasoline and Shindaiwa Premium 2-cycle
Engine Oil gasoline, 50:1 ratio). Fuel incorrect, stale, or contaminated;
mixture incorrect.
NO
YES
Is fuel visible
and moving in
the return line
when priming?
Check for clogged fuel filter and/or vent. Clean as required; restart.
NO
Is there spark at
the spark plug
wire terminal?
The ignition switch is in “O” (OFF) position.
Faulty ignition ground.
Faulty transistor unit. Move switch to "ON" position and re-start.
NO
YES
YES
Check the
spark plug
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.
Crank the engine with the plug removed,
replace the plug, and re-start.
Clean and re-gap the plug to 0.24 inch (0.6 mm).
Re-start.
Replace the plug with an NGK BMR6A Re-start.
YES
What To Check Possible Cause Remedy
Consult with an authorized servicing dealer.
Troubleshooting Guide (Engine continued)
LOW POWER OUTPUT
Is the engine
overheating?
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.
Consult with an authorized servicing dealer.
Re-fill with fresh fuel of the correct mixture
(gasoline and Shindaiwa Premium 2-cycle
Engine Oil, 50:1 ratio).
Clean, repair or replace as necessary.
Consult with an authorized servicing dealer.
What To Check Possible Cause Remedy
Engine is rough
at all speeds.
May also have
black smoke
and/or unburned
fuel at the
exhaust.
Clogged air filter.
Loose or damaged spark plug.
Air leakage or clogged fuel line.
Water in the fuel.
Piston seizure.
Faulty carburetor and/or diaphragm.
Service the filter.
Tighten or replace.
Repair or replace filter and/or fuel line.
Replace the fuel.
Consult with an authorized servicing dealer.
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 (pg. 7). Refuel as necessary.
Consult with an authorized servicing dealer.
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