Typical rust spots on exhaust manifolds......?

bluemarshboater

Petty Officer 2nd Class
Joined
Jul 6, 2009
Messages
118
Mercruiser 5.0.........

My exhaust manifolds at cylinder 1 and 2 have little holes right above those cylinder spark plugs that push some water out. Is this a typical rust spot for these?

Thanks
Dave
 

gadget73

Petty Officer 1st Class
Joined
Jun 20, 2009
Messages
308
Re: Typical rust spots on exhaust manifolds......?

If you've got water leaking to the outside of the manifolds, they are shot. They should not leak at all. I'd be replacing them asap so they don't rust to the inside and lock the motor up.
 

BILL INGRAHAM

Seaman
Joined
Jul 7, 2009
Messages
52
Re: Typical rust spots on exhaust manifolds......?

healthy manifolds and risers will rust stain at joints and loose paint areas-from condensation only-if your pushing water change out asap.:)
 

bluemarshboater

Petty Officer 2nd Class
Joined
Jul 6, 2009
Messages
118
Re: Typical rust spots on exhaust manifolds......?

Thanks for the replies.

Any advice on where to buy without over paying...... I see a lot of them on ebay and are supposed to be genuine Merc ones.

I see there are dry fit and non dry fit........ Do you have to disassemble to know this?

I have a 1992 5.0 Mercruiser.

Best
Dave
 
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