Troubleshooting; Troubleshooting Table - Husqvarna 125B Operator's Manual

Troubleshooting table

WARNING:
Always stop unit and disconnect spark plug before performing any of the
recommended remedies below other than remedies that require operation of the unit.
TROUBLE
CAUSE
Engine will not
1. Engine flooded.
start.
2. Fuel tank empty.
3. Spark plug not firing.
4. Fuel not reaching
carburetor.
5. Compression low.
1. Fuel not reaching
Engine will not
carburetor.
idle properly.
2. Carburetor requires
adjustment.
3. Crankshaft seals worn.
4. Compression low.
1. Air filter dirty.
Engine will not
2. Fuel not reaching
accelerate,
carburetor.
lacks power, or
dies under a
3. Spark plug fouled.
load.
4. Carburetor requires
adjustment.
5. Carbon build up.
6. Compression low.
1. Choke partially on.
Engine smokes
2. Fuel mixture incorrect.
excessively.
3. Air filter dirty.
4. Carburetor requires
adjustment.
Engine runs hot. 1. Fuel mixture incorrect.
2. Spark plug incorrect.
3. Carburetor requires
adjustment.
4. Carbon build up.
115491326 Rev. 2 4/30/12

TROUBLESHOOTING

REMEDY
1. See "Starting a Warm Engine"
in STARTING AND STOPPING section.
2. Fill tank with correct fuel mixture.
3. Install new spark plug.
4. Check for dirty fuel filter; replace.
Check for kinked or split fuel line;
repair or replace.
5. Contact an authorized service dealer.
1. Check for dirty fuel filter; replace.
Check for kinked or split fuel line;
repair or replace.
2. See "Fine Adjustment of the Idle Speed- -T"
in MAINTENANCE section.
3. Contact an authorized service dealer
4. Contact an authorized service dealer.
1. Clean or replace air filter.
2. Check for dirty fuel filter; replace.
Check for kinked or split fuel line;
repair or replace.
3. Clean or replace spark plug
and re-gap.
4. Contact an authorized service dealer.
5. Contact an authorized service dealer.
6. 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. See "Fuel mixture" in FUEL HANDLING
section.
2. Replace with correct spark plug.
3. Contact an authorized service dealer.
4. Contact an authorized service dealer.
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