90 hp Mercury outboard 1990 running hot

gratefulslim

Recruit
Joined
Apr 16, 2001
Messages
3
What are some causes for a engine running hot? How do you tell if the oil control box has failed. My alarm is sounding continuously when the key is in the on position and when the motor is running.
 

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Fleet Admiral
Joined
Mar 25, 2001
Messages
8,217
Re: 90 hp Mercury outboard 1990 running hot

If the alarm is on from the time you turn the key on,and there is no silent period, you have a short temp sensor. If is is on when the key is turned on,goes off when the engine is running, only to alarm about 3 minutes later, you have an overheating problem.<br /><br />------------------<br />Time to change my tagline
 
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