Ignition System - TOHATSU MFS25 Service Manual

Check spark plugs.
Normal?
YES
Use spark tester to check
ignition sparks.
Sparks are weak?
No sparks?
YES
Check connection of plug cap
and resistance.
Normal?
YES
Check ignition coil resistance.
Normal?
YES
Check ECU.
25/30 2006

Ignition System

NO
• When testing, put electrode cap assuredly to prevent
direct contact with spark tester wiring and leak of
electrical current.
• Keep inflammable gas, fuel, oil and fat away from tester
to prevent them from catching sparks.
NO
NO
NO
Clean and adjust
spark plug, or replace.
WARNING
Check fuel system.
Repair or replace plug cap.
Replace ignition coil.
9
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