Shindaiwa 68242-94311 Owner's/Operator's Manual page 17

Troubleshooting Guide
What To Check
Is the engine
overheating?
Engine is rough at all
speeds. May also have
black smoke and/or
unburned fuel at the
exhaust.
Engine is knocking.
Engine speed is
reduced.
LOW POWER OUTPUT
Possible Cause
Operator is overworking the unit.
Carburetor mixture is too lean.
Improper fuel ratio.
Fallen leaves or debris on intake cover..
Fan, fan cover, cylinder fins dirty or
damaged
Carbon deposits on the piston or in the
muffler.
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.
Heat sensor is activated, due to
restricted air flow at intake cover.
Remedy
Operate at slower rate.
Consult with an authorized servicing
dealer.
Refill with clean fresh unleaded
gasoline with a pump octane of 87 or
higher, mixed with Premium 2-cycle
mixing oil at a 50:1 gasoline/oil ratio.
Clean intake cover..
Clean, repair or replace as necessary.
Consult with an authorized servicing dealer
Clean or replace the air filter
Tighten or replace the spark
plug. Restart. Check the Product
Specifications page in this manual for
the correct spark plug for this unit.
Repair or replace fuel filter and/or fuel
line.
Refill with fresh fuel/oil mixture.
Consult with an authorized servicing
dealer.
Consult with an authorized servicing
dealer.
Check fuel octane rating; check for
presence of alcohol in the fuel. Refuel
as necessary.
Consult with an authorized servicing
dealer.
Stop the engine. Clean debris blocking
intake cover. Restart. Idle more than 1
minute. If engine speed is reduced again,
consult with an authorized servicing
dealer.
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