Cooling System - TOHATSU MD 70-90C2 Service Manual

O
Troubleshooting
K
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.
9-26

Cooling System

NO
Clean or replace
cooling water passage.
NO
Replace thermostat.
NO
Replace water
temperature sensor.
NO
Replace water pump.
TLDI 75/90C2 2010