Ryobi RHT25X55R, Original Instructions Manual, Page: 9 / 244

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TROUBLESHOOTING
Problem Possible cause Solution
Engine will not start. No spark Check for spark. Remove the spark plug.
Reattach the spark plug cap and lay spark plug on
metal cylinder. Pull the starter 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 the bulb is full of fuel. If
bulb does not
fi ll, the primary fuel delivery sys tem
is blocked. Con tact a servicing dealer. If prim er
bulb
fi lls, engine may be fl ooded, proceed to next
item.
Engine is fl ooded Pull starter three times with the choke lever at
position. If engine does not start, move choke
lever to position and repeat normal starting
procedure. If engine still fails to start, repeat
procedure with a new spark plug.
Starter rope is hard to pull. Contact a servicing dealer.
Engine starts but will not
ac cel er ate. Engine requires approximately
three minutes to warm up. Allow engine to completely warm up. If engine
does not accelerate after three minutes, contact a
ser vic ing dealer.
Engine starts but will only
run at high speed at half
choke. Carburettor requires adjustment. Contact a ser vic ing dealer.
Engine does not reach full
speed and emits ex ces sive
smoke. Lubricant and fuel mixture is
incorrect. Use fresh fuel and the correct 2-stroke lubricant
mix.
Air fi lter is dirty. Clean the air fi lter. Refer to Clean ing the Air Filter
section in this manual.
Spark arrestor screen is dirty. Contact a servicing dealer.
Engine starts, runs, and
accelerates but will not idle.
Idle speed screw on carburettor
requires adjustment
Contact a servicing dealer.