Efco MT3700 Troubleshooting Manual

Troubleshooting Guide

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If you are still experiencing problems after checking all possible
causes and solutions, please contact your servicing dealer.
Problem Possible Cause
Engine will not start Bad or old fuel mix
Ignition switch is turned off
Spark plug wire disconnected
Improper starting procedure
WARNING: Always stop unit and disconnect spark plug before performing all of the
recommended solutions below except solutions which require operation of the unit.
Make sure the unit has fresh fuel (less than 30 days old) and
correct 2-cycle oil mix.
Make sure the ignition switch/choke lever (C) is in the choke
position (1) if the engine is cold, see Fig. 1; or in the start "I"
position (2) if the engine is warm, see Fig. 2.
Make sure the spark plug wire is properly connected. With
the ignition switch off, remove the air filter cover and verify
that the spark plug boot is pushed completely down on the
spark plug, see Fig. 3.
Follow correct starting procedure:
Starting Cold Engine
1) Push ignition switch/choke lever (C) fully down to choke
position (1), see Fig. 1.
2) Pull the starter rope rapidly until the engine attempts to
start or starts momentarily.
3) Move ignition switch/choke lever (C) to intermediate posi-
tion (2), see Fig. 2.
4) Pull starter rope rapidly until engine starts.
5) Once the engine is running, accelerate with the throttle
(B), to release the half-throttle lock device, see Fig. 4.
Starting Warm Engine
1) Push ignition switch/choke lever (C) to intermediate posi-
tion (2), see Fig. 2.
2) Pull starter rope rapidly until engine starts.
MT3700 Chainsaw
Solution
1
2
3
4