water leek merccruiser 3.7

S

scat

Recruit
Joined
Feb 9, 2011
Messages
2
1st time on here. I have a 1989 3.7/lx 170 hp closed cooling system. Boat has been sitting for 4 years , when I fill the tank on top of the ex/manifold the water drains out through the water intake hose to the out drive. None going into the motor and not dripping into the boat but I just replaced the gimbal and have the out drive off and it leeks out my 3/4" intake hose. I took the tank off and the gasket looks rough but I thought I would see water sitting at the top of the manifold but I don't ? So I am thinking it is mixing together somewhere down lower. This has a log tank on it can that leek fresh and raw water together ? or is there something else I should check ?
Thanks :confused:
 
Don S

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: water leek merccruiser 3.7

Pressure test the heat exchanger. You will probably find your problem.
 
G

guyaverage

Petty Officer 2nd Class
Joined
Aug 4, 2008
Messages
101
Re: water leek merccruiser 3.7

Hopefully there is one and some hack didnt convert this to an open cooling system.
 
Bondo

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,453
Re: water leek merccruiser 3.7

/lx 170 hp closed cooling system. Boat has been sitting for 4 years , when I fill the tank on top of the ex/manifold the water drains out through the water intake hose to the out drive.
Click to expand...

Ayuh,... Welcome Aboard,...
Sounds like yer either Missing some pieces, or the exchanger is full of holes, where there shouldn't be...

Got a picture,..??
 
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