Water leaking problem on Mercury 850

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Fore04

Recruit
Joined
Oct 20, 2004
Messages
2
My Mercury 850 from 74 is leaking water from a 3mm hole on the left side in the exhaust manifold cover. Can I repair it with JB Weld or should I replace the cover with a new one. From the parts catalog I can see that it is an plate inside the cover as well but when I put a small screw driver into the hole it goes 3 inches in. :confused:
 
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andrewkafp

Lieutenant Commander
Joined
Mar 15, 2003
Messages
1,668
Re: Water leaking problem on Mercury 850

Low pressure in there.. I think JB would be OK
 
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Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,474
Re: Water leaking problem on Mercury 850

Fore, I must be misunderstanding some part of yor posting. A screwdriver should not be able to fit 3 inches of its length into the exhaust cover. The space between the inner exhaust cover(AKA baffle) and the outer exhaust cover is only 1/2 inch or so. Three inches of screwdriver would likely enter the cylinder itself, and hit the piston.
 
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Fore04

Recruit
Joined
Oct 20, 2004
Messages
2
Re: Water leaking problem on Mercury 850

Thank you for your answers. It's seems like the baffle plate is also corroded. I think the screwdriver goes in between two of cylinders in a cooling valve. I probably have to remove the exhaust cover anyway!?
 
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