McCulloch TRIMMAC LT25NCOP Operator's Manual page 11

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