Troubleshooting; Using Troubleshooting Chart - Efco MT 3500 Manuel D'utilisation Et D'entretien

Using Trouble shooting Chart
WARNING: Always stop unit and disconnect spark plug before performing all of the
recommended remedies below except remedies that require operation of the unit.
When you have checked all the possible causes listed and you are still experiencing the problem, see your
Servicing Dealer. If you are experiencing a problem that is not listed in this chart, see your Servicing Dealer
for service.
PROBLEM
Engine will not start or will run only a
few seconds after starting.
(Make sure Ignition switch is in start
position "I")
Engine starts but will not accelerate
properly:
Engine starts but will not run properly at
high speed.
Engine does not reach full speed and /
or emits excessive smoke
Engine starts, runs, and accelerates but
will not idle.
Bar and Chain Running Hot and
Smoking
Engine starts and runs, but chain is not
rotating
WARNING: Never touch
the chain while the engine
is running.
*Note: This engine complies with EPA (Environmental Protection Agency) 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 Servicing Dealer for repair.

TROUBLESHOOTING

POSSIBLE CAUSE
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. Chain tension too tight.
3. Oiler function.
1. Chain brake engaged.
2. Chain tension too tight.
3. Guide bar and chain assembly.
4. Chain and/or guide bar damaged.
5. Clutch drum and/or rim sprocket
damaged.
SOLUTION
1. Check Spark. Remove air filter cover.
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 (RCJ-7Y).
2. With the ignition switch off, remove
spark plug. Move choke lever to Run
position (pushed in completely) and pull
starter cord 15 to 20 times. This will clear
excess fuel from engine. Clean and
reinstall spark plug. Pull the choke lever
all out and then insert it completely in
order to activate the semi-acceleration
device. 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 Servicing Dealer
carburetor adjustment.
* Contact a Servicing Dealer
carburetor adjustment.
1. Use fresh fuel and the correct 2-cycle
oil mix.
2. Clean per instruction in Maintenance-
Air Filter Section.
3. Clean per instructions in Maintenance-
Spark Arresting Muffler Section.
4. * Contact a Servicing Dealer for
carburetor adjustment.
Turn idle speed screw "T" clockwise to
increase idle speed. (If chain turns at
idle, turn idle speed screw
counterclockwise to decrease speed);
see Operation-Carburetor Adjustment.
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 bar tip guard and guide bar. If oil
is present the chain may be dull or
bar may be damaged. If no oil contact
a Servicing Dealer.
1. Release chain brake, see Operation-
Chain Brake Section.
2. Tension chain per instructions in
Operation-Chain Tension section.
3. Refer to Assembly-Assembling the
Bar and Chain Section.
4. Refer to Maintenance-Chain and/or
Maintenance-Guide Bar Section.
5. Replace if necessary - contact a
Servicing Dealer.
en
for
for
"T"
35