My "new" 1999 Merc 150 is overheating. I was hoping that it was giving false whistles because of dead battery but with a good battery it still alarms.
I started the motor and within 4 minutes the alarm went off. There was a good stream of water spraying out but the water was very hot.
I am going to take Kajun's advise and check the thermostats. Are these the thermostat housings?
Also, shouldn't there be something attached to this?
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Sold - 1984 V-20 Cuddy with a 2003 Johnson 140 hp gas sippin 4-stroke.
1995 Ranger 250C with a 2015 Suzuki 300 hp 4-stroke.