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TROUBLESHOOTING
Problem Possible Cause Solution
Engine will not start.
[Make sure ignition
switch is in the RUN
( l ) position.]
No spark.
Engine is flooded.
Clean or replace spark plug. Reset spark plug gap. Refer to Spark
Plug Replacement earlier in this manual.
With the ignition switch OFF, remove spark plug. Move choke
lever to RUN position (pushed in completely) and pull starter cord
15 to 20 times. This will clear excess fuel from engine. Clean and
reinstall spark plug. Set ignition switch to RUN ( l ) position. Push
and fully release primer bulb 7 times. Pull starter three times with
choke lever at RUN. If engine does not start, move choke lever to
HALF CHOKE and repeat normal starting procedure. If engine still
fails to start, repeat procedure with a new spark plug.
Engine starts but will
not accelerate prop-
erly.
Carburetor requires “L”
(Low Jet) adjustment.
Contact an authorized service center for carburetor adjustment.
Engine starts, then
dies.
Carburetor requires “L”
(Low Jet) adjustment.
Contact an authorized service center for carburetor adjustment.
Engine starts but will
not run properly at
high speed.
Carburetor requires “H”
(High Jet) adjustment.
Contact an authorized service center for carburetor adjustment.
Engine does not reach
full speed and/or emits
excessive smoke.
Oil/fuel mixture incorrect.
Air filter is dirty.
Spark arrestor screen is
dirty.
Carburetor requires “H”
(High Jet) adjustment.
Use fresh fuel and the correct 2-cycle oil mix ratio.
Clean air filter. Refer to Cleaning the Air Filter in the Maintenance
section of this manual.
Clean spark arrestor screen. Refer to Inspecting/Cleaning the Spark
Arrestor Screen in the Maintenance section of this manual.
Contact an authorized service center for carburetor adjustment.
Engine starts, runs,
and accelerates but
will not idle.
Chain turns at idle.
Carburetor requires
adjustment to idle speed.
Carburetor requires
adjustment to idle speed.
Air leak in the intake
system.
Turn idle speed screw “T” clockwise to increase idle speed.
Refer to Adjusting the Carburetor in the Maintenance section of
this manual.
Turn idle speed screw “T” counterclockwise to decrease speed.
Refer to Adjusting the Carburetor in the Maintenance section of
this manual.
Contact an authorized service center for a rebuild kit.
BAR AND CHAIN COMBINATIONS
Chain specifications: 3/8 in. pitch, .05 in. chain gauge
Length of Bar Guide Bar Part Number Chain Part Number Drive Links
14 in. 310625001 901212001 52
16 in. 310626001 901212002 56