Shindaiwa 502s Owner's/Operator's Manual page 19

Troubleshooting Guide (continued)
Symptom
Poor acceleration.
Engine stops abruptly.
Engine difficult to shut off.
Chain rotates at idle speed.
Excessive vibration.
ADDITIONAL PROBLEMS
Possible Cause
Clogged air filter.
Clogged fuel filter.
Chain brake engaged.
Lean fuel/air mixture.
Idle speed set too low.
Switch turned off.
Fuel tank empty.
Clogged fuel filter.
Water in the fuel.
Shorted spark plug or loose terminal.
Ignition failure.
Piston seizure.
Ground (stop) wire is disconnected, or
switch is defective.
Overheating due to incorrect spark plug.
Overheated engine
Engine idle too high.
Broken clutch spring or worn clutch
spring boss.
Warped or damaged sprocket, chain,
or bar.
Bent crankshaft.
Remedy
Clean or replace the air filter.
Replace the fuel filter.
Inspect and/or test brake. Consult with
an authorized servicing dealer.
Consult with an authorized servicing
dealer.
Adjust: 2,800 min .
-1
Reset the switch and restart.
Refuel. See section on Filling the Tank
with Fuel..
Replace fuel filter.
Drain; replace with clean fuel. See section
on Filling the Tank with Fuel.
Clean or replace the plug. Check the
Specifications page for the correct spark plug.
Tighten the terminal.
Replace the ignition unit.
Consult with an authorized servicing
dealer.
Test and replace as required.
Replace the plug. Check the Specifications
page for the correct spark plug.
Idle engine until cool.
Set idle: 2,800 min
-1
Replace spring/shoes as required, check
idle speed.
Inspect and replace chain components as
required.
Consult with an authorized servicing
dealer.
19