TROUBLESHOOTING

Problem

Possible Cause

Solution

Engine will not start.

No spark.

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.

 

No fuel.

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.

 

Engine is flooded.

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

Incorrect oil/fuel mixture.

Use fresh fuel and the correct 2-cycle oil mix. (50:1).

speed and emits excessive

Air filter is dirty.

Clean air filter. Refer to Replacing and Cleaning Air

smoke.

 

Filter earlier in this manual.

 

 

 

Spark arrestor screen is dirty.

Contact a servicing dealer.

 

Spark plug fouled.

Clean or replace spark plug. Reset spark plug gap. Refer

 

 

to Spark Plug Replacement earlier in this manual.

 

 

 

Engine starts, runs, and

Idle speed screw on carburetor

Turn idle speed screw clockwise to increase idle speed.

accelerates but will not idle.

needs adjustment.

See Figure 30.

 

 

 

String will not advance.

String is welded to itself.

Lubricate string with silicone spray.

 

Not enough string on spool.

Install more string. Refer to String Replacement earlier

 

 

in this manual.

 

String is worn too short.

Pull strings while alternately pressing down on and

 

 

releasing spool retainer.

 

String is tangled on spool.

Remove string from spool and rewind. Refer to String

 

 

Replacement earlier in this manual.

 

Engine speed is too slow.

Advance string at full throttle.

 

 

 

IDLE

SPEED

SCREW

Fig. 30

22

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Ryobi RY30540, SS30, RY30560, RY30921, RY30520, RY30961, RY30941CS30 manual Troubleshooting, Idle Speed Screw