John Deere PA01186 CS71 - Manual (Page 26)

26 English
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
1. Check Spark. Remove air filter cover. Remove spark
plug from cylinder. Reattach the spark plug wire and
lay spark plug on top of 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.
2. With the ignition switch off, remove spark plug. Move
choke lever to run position (pushed in completely) and
pull starter cord 5 to 20 times. This will clear excess
fuel from engine. Clean and reinstall spark plug. Pull
starter three times with choke lever at run. If engine
does not start, move choke lever to choke and repeat
normal starting procedure. If engine still fails to start,
repeat procedure with a new spark plug.
* Contact a John Deere Servicing Dealer for carburetor
adjustment.
* Contact a John Deere Servicing Dealer for carburetor
adjustment.
1. Use fresh fuel and the correct 2-cycle oil mix.
2. Clean per instruction in Maintenance-Air Filter Sec-
tion.
3. Clean per instructions in Maintenance-Spark Arrest-
ing Muffler Section.
4. * Contact a John Deere Servicing Dealer for carburetor
adjustment.
Turn idle speed screw “T” clockwise to increase idle
speed. (If chain turns at idle, turn idle speed screw “T”
counterclockwise to decrease speed). Wear protective
equipment and observe all safety instructions.
1. Oil tank should be filled every time that fuel tank is
filled.
2. Tension chain per instructions in Operation-Chain
Tension section.
3. Run at full throttle 15 to 30 seconds. Stop saw and
check for oil dripping from Safe-T-Tip and guide bar.
If oil is present the chain may be dull or bar may be
damaged. If no oil contact a John Deere Servicing
Dealer.
1. Release chain brake, see Operation-Chain Brake
Section.
2. Refer to Assembly-Assembling the Bar and Chain
Section.
3. Inspect guide bar and chain for damage.
Engine will not start:
(Make sure Ignition switch
is in start position “I”.)
Engine starts but will not ac-
celerate properly:
Engine starts but will not run
properly at high speed .
Engine does not reach full
speed and / or emits exces-
sive smoke:
Engine starts, runs, and ac-
celerates but will not idle.
Bar and Chain Running Hot
and Smoking:
Engine starts and runs, but
chain is not rotating:
Using Troubleshooting Chart
If you are experiencing a problem that is not listed in this chart, see your John Deere Servicing Dealer for service.
When you have checked all the possible causes listed and you are still experiencing the problem, see your John Deere Servicing
Dealer.
1. No spark
2. Flooded engine.
Carburetor requires “L” (Low jet) adjustment.
Carburetor requires “H” (High jet) adjustment.
1. Check oil fuel mixture.
2. Air filter dirty.
3. Spark arrester screen dirty.
4. Carburetor requires “H” (High jet) adjustment.
Carburetor requires adjustment.
1. Chain oil tank empty.
2. Check chain tension.
3. Check for oiler function.
1. Chain brake engaged.
2. Check guide bar and chain assembly.
3. Check guide bar and chain for damage.
* Note: This engine complies with EPA (Environmental Protection Agency) and CARB (California Air Resource Board) regulations which
require exhaust emission control. As a result, the carburetor adjustment needles are equipped with plastic caps that limit the rotation from
the original factory adjustment. If your unit exhibits specific performance problems that can not be corrected by the Trouble Shooting
Section, the unit should be taken to a John Deere Servicing Dealer for repair.
T
H
L