Idle Engine Speed Will Not Stabilize - TOHATSU MFS 4D Service Manual

4 stroke
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O
Troubleshooting
K
Trouble 3

Idle engine speed will not stabilize.

• Inspection of Intake Manifold, Air Intake System and Ignition System
Check operations
of throttle cable and drum.
Normal ?
YES
Check ignition timing.
Out of specified
range?
YES
Check igniter clearance.
9-8
NO
Adjust throttle cable.
NO
Check gaskets
if secondary air is
sucked through them.
4st 4/5/6 2020

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Mfs 5dMfs 6d

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