Ryobi RY3818 Operation Manual - Page 38

Troubleshooting

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TROUBLESHOOTING Problem Possible Cause Solution Engine will not No spark. start. Check spark. Remove air filter cover. Remove spark plug from cylinder. Reattach the spark plug wire and lay spark plug on top of cylinder with the metal part of plug touching the cylinder. Pull the starter grip and watch for spark at spark plug tip. If there is no spark, repeat test with a new spark plug. Engine is flooded. Remove spark plug. Move choke knob to RUN position (pushed in completely) and pull starter grip 15 to 20 times. This will clear excess fuel from engine. Clean and reinstall spark plug. Push and fully release primer bulb 10 times. Pull starter three times with choke knob at RUN. If engine does not start, move choke knob to HALF CHOKE and repeat normal starting procedure. If engine still fails to start, repeat procedure with a new spark plug. Engine starts but Carburetor requires Contact a qualified service center for carburetor adjust- will not accelerate "L" (Low Jet) adjust- ment. properly. ment. Engine starts, then Carburetor requires Contact a qualified service center for carburetor adjust- dies. "L" (Low Jet) adjust- ment. ment. Engine starts but Carburetor requires Contact a qualified service center for carburetor adjustwill not run prop- "H" (High Jet) adjust- ment. erly at high speed. ment. Engine does not reach full speed and/or emits excessive smoke. Lubricant/fuel mixture incorrect. Air filter is dirty. Use fresh fuel and the correct 2-cycle lubricant mix ratio. Clean air filter. Refer to Cleaning the Air Filter in the Maintenance section of this manual. Carburetor requires Contact a qualified service center for carburetor adjust"H" (High Jet) adjust- ment. ment. Engine starts, runs, Carburetor requires Turn idle speed screw "T" clockwise to increase idle and accelerates ­adjustment to idle speed. Refer to Adjusting the Carburetor in the Main- but will not idle. speed. tenance section of this manual. Chain turns at idle. Carburetor requires Turn idle speed screw "T" counterclockwise to decrease ­adjustment to idle speed. Refer to Adjusting the Carburetor in the Main- speed. tenance section of this manual. Air leak in the intake Contact a qualified service center for a rebuild kit. system. Page 38 - English

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Page 38 — English
Problem
Possible Cause
Solution
Engine will not
start.
No spark.
Engine is flooded.
Check spark. Remove air filter cover. Remove spark
plug from cylinder. Reattach the spark plug wire and lay
spark plug on top of cylinder with the metal part of plug
touching the cylinder. Pull the starter grip and watch for
spark at spark plug tip. If there is no spark, repeat test
with a new spark plug.
Remove spark plug. Move choke knob to RUN position
(pushed in completely) and pull starter grip 15 to 20
times. This will clear excess fuel from engine. Clean
and reinstall spark plug. Push and fully release primer
bulb 10 times. Pull starter three times with choke knob
at RUN. If engine does not start, move choke knob 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
properly.
Carburetor requires
“L”
(Low Jet) adjust-
ment.
Contact a qualified service center for carburetor adjust-
ment.
Engine starts, then
dies.
Carburetor requires
“L”
(Low Jet) adjust-
ment.
Contact a qualified service center for carburetor adjust-
ment.
Engine starts but
will not run prop-
erly at high speed.
Carburetor requires
“H”
(High Jet) adjust-
ment.
Contact a qualified service center for carburetor adjust-
ment.
Engine does not
reach full speed
and/or emits ex-
cessive smoke.
Lubricant/fuel mixture
incorrect.
Air filter is dirty.
Carburetor requires
“H”
(High Jet) adjust-
ment.
Use fresh fuel and the correct 2-cycle lubricant mix ratio.
Clean air filter. Refer to
Cleaning the Air Filter
in the
Maintenance
section of this manual.
Contact a qualified service center for carburetor adjust-
ment.
Engine starts, runs,
and accelerates
but will not idle.
Carburetor requires
adjustment to idle
speed.
Turn idle speed screw
“T”
clockwise to increase idle
speed. Refer to
Adjusting the Carburetor
in the
Main-
tenance
section of this manual.
Chain turns at idle.
Carburetor requires
adjustment to idle
speed.
Air leak in the intake
system.
Turn idle speed screw
“T”
counterclockwise to decrease
speed. Refer to
Adjusting the Carburetor
in the
Main-
tenance
section of this manual.
Contact a qualified service center for a rebuild kit.
TROUBLESHOOTING