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Troubleshooting Guide

MT3700 Chainsaw

WARNING: 

Always stop unit and disconnect spark plug before performing all of the 

recommended solutions below except solutions which require operation of the unit. 

If you are still experiencing problems after checking all possible 

causes and solutions, please contact your servicing dealer.

!

Problem 

Possible Cause

Solution

Engine will not start Bad or old fuel mix

Make sure the unit has fresh fuel (less than 30 days old) and 

correct 2-cycle oil mix.

Ignition switch is turned off

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.

Spark plug wire disconnected

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.

Improper starting procedure

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.

2

3

4

1

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