Ignition System - TOHATSU MFS 25D Service Manual

Check spark plugs.
Normal?
YES
Use spark tester to check
ignition sparks.
Normal?
YES
Check stop switch and main
switch key.
Normal?
YES
Check connection of plug cap
and resistance.
Normal?
YES
Check ignition coil resistance.
Go to next page.
4st 25/30 2022

Ignition System

• When testing, cover the electrode cap properly so as to prevent
leaks and contact with the wiring of the spark tester.
• Keep flammable gas, fuel, and oils away, because testing
generates sparks.
NO
Check pulsar coil resistance
and/or air gap.
Normal?
Check fuel system and
compression pressure.
NO
Clean and adjust spark
plugs, or replace.
WARNING
NO
Adjust pulser coil air gap
and/or replace pulser coil.
YES
NO
Replace stop switch or
main switch key.
NO
Repair or replace plug
cap.
9
9-5