McCulloch 250 B instruction manual Troubleshooting Table, Cause, Remedy

TROUBLESHOOTING TABLE

WARNING: Always stop unit and disconnect spark plug before performing all of the recommended remedies below except remedies that require operation of the unit.

TROUBLE	CAUSE		REMEDY
Engine will not	1. ON/STOP switch in STOP		1.	Move ON/STOP switch to ON
start.		position.		position.
	2. Engine flooded.		2.	See “Starting a Flooded Engine” in
	3. Fuel tank empty.			Operation Section.
			3.	Fill tank with correct fuel mixture.
	4. Spark plug not firing.		4.	Install new spark plug.
	5. Fuel not reaching		5.	Check for dirty fuel filter; replace.
		carburetor.		Check for kinked or split fuel line;
	6. Carburetor requires			repair or replace.
			6.	Contact an authorised service dealer.
		adjustment.
Engine will	1. Carburetor requires		1.	See “Carburetor Adjustment” in
not idle		adjustment.		Service and Adjustments Section.
properly.	2. Crankshaft seals worn.		2.	Contact an authorised service dealer.
	3. Compression low.		3.	Contact an authorised service dealer.
Engine will not	1.	Air filter dirty.	1. Clean or replace air filter.
accelerate,	2. Spark plug fouled.		2. Clean or replace plug
lacks power,	3.	Carburetor requires		and regap.
or dies under			3. Contact an authorised service dealer.
a load.	4.	adjustment.	4. Contact an authorised service dealer.
		Carbon build-up on
		muffler outlet screen.
	5.	Compression low.	5. Contact an authorised service dealer.
Engine	1.	Choke partially on.	1.	Adjust choke.
smokes	2.	Fuel mixture incorrect.	2.	Empty fuel tank and refill with
excessively.	3.	Air filter dirty.		correct fuel mixture.
			3.	Clean or replace air filter.
	4.	Carburetor requires	4.	Contact an authorised service dealer.
		adjustment.
Engine runs	1. Fuel mixture incorrect.		1. Empty fuel tank and refill with
hot.	2. Spark plug incorrect.			correct fuel mixture.
			2. Replace with correct spark plug.
	3. Carburetor requires		3. Contact an authorised service dealer.
		adjustment.
	4. Carbon build-up on		4. Contact an authorised service dealer.
		muffler outlet screen.

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