Shindaiwa AHS231/EVC Owner's/Operator's Manual page 17

Troubleshooting Guide (continued)
Symptom
Poor acceleration.
Engine stops abruptly.
Engine difficult to shut off.
Cutting attachment rotates at
engine idle.
Excessive vibration.
Cutting attachment will not
rotate.
ADDITIONAL PROBLEMS
Possible Cause
Clogged air filter.
Clogged fuel filter.
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.
Loose attachment holder.
Warped or damaged cutting attachment.
Loose gearcase.
Bent main shaft/worn or damaged
bushings.
Shaft not installed in powerhead or
gearcase.
Broken shaft.
Damaged gearcase.
Remedy
Clean or replace the air filter.
Replace the fuel filter.
Consult with an authorized servicing dealer.
Adjust: 2,750 (±250) rpm (min
Reset the switch and re-start.
Refuel. See page 9.
Replace filter.
Drain; replace with clean fuel. See page 9.
Clean or replace spark plug with a Champion
CJ8 or equivalent type spark plug of the correct
heat range. For EMC compliance, use
NGK BMR6A.
Replace the ignition unit.
Consult with an authorized servicing dealer.
Test and replace as required.
Replace spark plug with a Champion CJ8 or
equivalent spark plug of the correct heat
range. For EMC compliance, use NGK BMR6A.
Idle engine until cool.
Set idle: 2,750 (±250) rpm (min
Replace spring/shoes as required, check idle
speed.
Inspect and re-tighten holders securely.
Inspect and replace attachment as required.
Tighten gearcase securely.
Inspect and replace as necessary.
Inspect and reinstall as required.
Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
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