Troubleshooting Guide (continued)

ADDITIONAL PROBLEMS

Symptom

 

Possible Cause

 

Remedy

 

 

Clogged air filter.

 

Clean the air filter.

Poor acceleration.

 

Clogged fuel filter.

 

Replace the fuel filter.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lean fuel/air mixture.

 

Consult with an authorized servicing dealer.

 

 

 

 

 

 

 

 

Idle speed set too low.

 

Adjust: 3,000 (±250) RPM (min-1).

 

 

 

 

 

 

 

 

Switch turned off.

 

Reset the switch and restart.

 

 

 

Engine stops abruptly.

 

 

Fuel tank empty.

 

Refuel. See page 7.

 

 

 

 

 

 

 

 

 

 

 

 

 

Clogged fuel filter.

 

Replace fuel filter.

 

 

 

 

 

Water in the fuel.

 

Drain; replace with clean fuel. See page 7.

 

 

 

 

 

 

 

 

Shorted spark plug or loose terminal.

 

Clean and replace spark plug, tighten

 

 

 

 

 

 

 

the terminal.

 

 

 

 

 

 

Ignition failure.

 

Replace the ignition unit.

 

 

 

 

 

 

 

 

Piston seizure.

 

Consult with an authorized servicing dealer.

 

 

 

 

 

 

 

 

 

 

Ground (stop) wire is disconnected or

 

Test and replace as required.

 

 

 

Engine difficult to shut off.

 

 

switch is defective.

 

 

 

 

Overheating due to incorrect spark plug.

 

Idle engine until cool.

 

 

 

 

 

 

 

Clean and regap the plug to 0.024 - 0.028

 

 

 

 

inch (0.6 - 0.7 mm). Correct plug: NGK BPMR6A

 

 

 

 

or equivalent resistor type spark plug of the

 

 

 

 

correct range.

 

 

 

 

 

 

Overheated engine.

 

Idle engine until cool.

 

 

 

 

 

 

 

 

 

 

 

 

 

Engine idle too high.

 

Set idle: 3,000 (±250) RPM (min-1).

Cutting attachment

 

 

 

 

 

 

 

 

rotates at engine idle.

 

Broken clutch spring or worn clutch

 

Replace spring/shoes as required, check

 

 

 

 

 

 

 

spring boss.

 

idle speed.

 

 

 

 

 

Loose attachment holder.

 

Inspect and re-tighten holders securely.

 

 

 

 

 

 

 

 

 

 

 

 

 

Engine will not idle down.

Engine idle set too high.

Engine has an air leak.

Set idle: 3,000 (±250) RPM (min-1).

Consult with an authorized servicing dealer.

Symptom

Excessive vibration.

ADDITIONAL PROBLEMS

Possible Cause

 

Remedy

Warped or damaged cutting attachment.

 

Inspect and replace attachment as required.

 

 

Loose gearcase.

 

Tighten gearcase securely.

 

 

Bent main shaft/worn or damaged

 

Inspect and replace as necessary.

 

 

liner.

 

 

Cutting attachment will not rotate.

Shaft not installed in powerhead or gearcase.

Broken shaft.

Damaged gearcase.

Inspect and reinstall as required.

Consult with an authorized servicing dealer.

16

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Shindaiwa 81645 manual Additional Problems

81645 specifications

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