help plz Overheat problem

dead_soul79

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Jun 9, 2013
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5
i have a 1987 larson dc190 runabout that has a mercruiser 3.7 took the boat out and ran good then started over heating . i'm looking for a service manual to help me fix the problem.
 

Don S

Honorary Moderator Emeritus
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Aug 31, 2004
Messages
62,321
Re: help plz

Re: help plz

As noted, the impeller is the FIRST thing you check in any marine overheat.
I would suggest you remove the drive from the boat, to check. Since the boat is new to you, you might as well check in there as well.

The .pdf files below is just small sections from the OEM manuals so you don't have to leaf through many pages of the manual.

View attachment A1 R&R.pdf View attachment A1 Impeller R&R.pdf

I also edited the title of your thread so it actually means something. Everyone posting here wants "help plz"
 
Joined
Mar 27, 2010
Messages
3,008
Re: help plz Overheat problem

Since you have no known history of the impeller, I would replace the complete water pump assembly with OEM parts...
which would include:

Quicksilver 46-96148A 8 (Water Pump Upper Housing Repair Kit)
Quicksilver 46-44292A 3 (Lower Base Kit for an Alpha One)
 

dead_soul79

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Joined
Jun 9, 2013
Messages
5
Re: help plz Overheat problem

would like to thank you all the impeller was the problem and the boat has been running cool as could be thank you all so much
 
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