Troubleshooting; Troubleshooting Schedule - Husqvarna 440 Operator's Manual

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.
Problem
Engine will not start or will only
run a few seconds after
starting.
Engine will not idle properly.
Engine will not accelerate,
lacks power or dies under a
load.
Engine smokes excessively.
Chain moves at idle speed.
1154886-49 Rev.4 2013-06-20

TROUBLESHOOTING

Cause
1. Ignition switch off.
2. Engine flooded.
3. Fuel tank empty.
4. Spark plug not firing.
5. Fuel not reaching
carburetor.
1. Idle speed requires
adjustment.
2. Carburetor requires
adjustment.
1. Air filter dirty.
2. Spark plug fouled.
3. Chain brake engaged.
4. Carburetor requires
adjustment.
1. To much oil mixed with
gasoline.
1. Idle speed requires
adjustment.
2. Clutch requires repair.
Solution
1. Move ignition switch to ON.
2. See "Start" in the
STARTING AND STOPPING"
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.
1. See "Fine adjustment of the
idling speed T" in the
MAINTENANCE section.
2. Contact an authorized
service dealer.
1. Clean or replace air filter.
2. Clean or replace plug and
regap.
3. Disengage chain brake.
4. Contact an authorized
service dealer.
1. Empty fuel tank and refill
with correct fuel mixture.
1. See "Fine adjustment of the
idling speed T" in the
MAINTENANCE section.
2. Contact an authorized
service dealer.
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