22
TROUBLESHOOTINGIDLE
SPEED
SCREW
Problem Possible Cause Solution
Engine will not start. No spark.
No fuel.
Engine is flooded.
Che ck spa rk . Re mo ve s par k p lug . R eat ta ch
the spar k p lug cap an d l ay spark pl ug on meta l
cylinder. Pull the rope and watch for spa rk at spark
plug tip. If ther e is no spark, repeat test wit h a new
spark plug.
Push primer bulb until bulb is full of fuel. If bulb does not
fill, primary fu el 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 star ts and runs.
NOTE: Depending on the severity of the flooding, this
may require numerous pulls of the rope. See Figure
22.
Engine does not rea ch f ull
speed and e mits 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 m ix. (50:1).
Clean air fil ter. Refer to Re placing and Cleaning Ai r
Filter earlier in this manual.
Contact a servicing dealer.
Clean or replace spark plug. Reset spark plug gap. Refer
to Spark Plug Replacem ent earlier in this manual.
Engi ne s tar ts, run s, an d
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 st rings w hile al ternately pressing down on a nd
releasing spool retainer.
Remove string from spool a nd rewind. Refer to Stri ng
Replacement earlie r in this manual.
Advance string at full throttle.