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22
TROUBLESHOOTING
IDLE
SPEED
SCREW
Problem Possible Cause Solution
Engine will not start. No spark.
No fuel.
Engine is flooded.
Check spark. Remove spark plug. Reattach
the spark plug cap and lay spark plug on metal
cylinder. Pull the rope and watch for spark at spark
plug tip. If there is no spark, repeat test with a new
spark plug.
Push primer bulb until bulb is full of fuel. If bulb does not
fill, primary fuel delivery system is blocked. Contact a
service dealer. If primer bulb fills, engine may be flooded,
proceed to next item.
Set the start lever to the START position. Pull the starter
grip repeatedly until the engine starts and runs.
NOTE: Depending on the severity of the flooding, this
may require numerous pulls of the rope. See Figure
22.
Engine does not reach full
speed and emits excessive
smoke.
Incorrect oil/fuel mixture.
Air filter is dirty.
Spark arrestor screen is dirty.
Spark plug fouled.
Use fresh fuel and the correct 2-cycle oil mix. (50:1).
Clean air filter. Refer to Replacing and Cleaning Air
Filter earlier in this manual.
Contact a servicing dealer.
Clean or replace spark plug. Reset spark plug gap. Refer
to Spark Plug Replacement earlier in this manual.
Engine starts, runs, and
accelerates but will not idle.
Idle speed screw on carburetor
needs adjustment.
Turn idle speed screw clockwise to increase idle speed.
See Figure 30.
String will not advance.
String is welded to itself.
Not enough string on spool.
String is worn too short.
String is tangled on spool.
Engine speed is too slow.
Lubricate string with silicone spray.
Install more string. Refer to String Replacement earlier
in this manual.
Pull strings while alternately pressing down on and
releasing spool retainer.
Remove string from spool and rewind. Refer to String
Replacement earlier in this manual.
Advance string at full throttle.
Fig. 30