Symbol Technologies B450 Troubleshooting Guide Continued, Additional Problems, Symptom, Remedy

Troubleshooting Guide (Continued)

Additional Problems

Symptom	Possible Cause	Remedy
	Clogged air filter.	Clean or replace the air filter.
Poor
acceleration.	Clogged fuel filter.	Replace the fuel filter.
	Lean fuel/air	Consult with an authorized
	mixture.	servicing dealer.
	Idle speed set too low.	Adjust: 2,750 min-1
	Switch turned off.	Reset the switch and re-start.
Engine stops
abruptly.	Fuel tank empty.	Refuel. See page 12.
	Clogged fuel filter.	Replace fuel filter.
	Water in the fuel.	Drain; replace with clean fuel.
		See page 12.
	Shorted spark plug or	Clean or replace spark plug with
	loose terminal.	a NGK BMR6A. Tighten the terminal.
	Ignition failure.	Replace the ignition unit.
	Piston seizure.	Consult with an authorized
		servicing dealer.
	Ground (stop) wire is	Test and replace
Engine difficult
	disconnected, or	as required.
to shut off.
	switch is defective.
	Overheating due to	Replace spark plug with a NGK BMR6A.
	incorrect spark plug.
	Overheated engine.	Idle engine until cool.
	Engine idle too high.	Set idle: 2,750 min-1
Cutting
attachment	Broken clutch spring	Replace spring/shoes as
moves at
	or worn clutch spring	required, check idle speed.
engine idle.
	boss.
		Inspect and re-tighten
	Loose attachment
	holder.	holders securely.

Excessive vibration

Attachment will not rotate

Warped or damaged attachment.

Loose gearcase.

Bent main shaft/worn or damaged bushings.

Shaft not installed in powerhead or

gearcase.

Broken shaft.

Damaged gearcase.

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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