Cooling System - TOHATSU MFS25 Service Manual

Check cooling water passage
for clogging or leak.
Normal?
YES
Check thermostat.
Normal?
YES
Measure water temperature
sensor resistance.
Normal?
YES
Check water pump.
Normal?
YES
Check ignition system,
fuel system and/or
lubrication system.
25/30 2006

Cooling System

NO
NO
NO
NO
Clean or replace cooling
water passage.
Replace thermostat.
Replace water
temperature sensor.
Replace water pump.
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