87 350 mercruiser running hot

BRTate

Seaman Apprentice
Joined
Jul 6, 2011
Messages
47
Took my boat out today and ran it for about 10 mins. Noticed it was very hot. Shut it down came home. Hooked up muffs in the yard and there is no exhaust water pumping out of the foot, there is also a knocking sound coming from the lower unit. I haven't checked anything yet, just looking for some opinions. Thanks for any help you can give.
 

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,093
Re: 87 350 mercruiser running hot

drive oil level and condition, impeller, does the shift engauge anything
 

BRTate

Seaman Apprentice
Joined
Jul 6, 2011
Messages
47
Re: 87 350 mercruiser running hot

Dosen't seem to have any trouble shifting.
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,465
Re: 87 350 mercruiser running hot

Dosen't seem to have any trouble shifting.

Ayuh,... Welcome Aboard,.... Until you actually Check something,... Who Knows.....

So far, I can tell ya it's Broken....

In Any Overheat situation, the very 1st thing to do is pull the lower, 'n change out the impeller pump.....
Drainin' the drive oil is, of course, part of that operation...
 
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