Mercruiser #1 3.0 exhaust down pipe gasket?

fishrdan

Admiral
Joined
Jan 25, 2008
Messages
6,989
I found another problem during my engine install ... (72 Mercruiser 140HP 3.0 S/N 2913009, #1 drive S/N 2901044)

I removed the exhaust down pipe (so I could remove/replace trim hoses) and noticed there was no gasket used between the gimble housing and exhaust down pipe :eek: I assume there is supposed to be a gasket between these 2 parts and just not sealed with some type of liquid gasket material,,, correct?

While cleaning up the mating surfaces I didn't notice any sealer and only scraped off some corrosion and old paint. Heck, while I was removing the bolts it was wiggling around and not stuck to the gimble housing. Guess I might have found my pesky water leak.

Now what's that tag line I've read here before... just because you found it that way, doesn't mean it's supposed to be that way! Kind of sums up my engine rebuild...
 

Bondo

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Apr 17, 2002
Messages
70,958
Re: Mercruiser #1 3.0 exhaust down pipe gasket?

Ayuh,....

There's usually a formed O-ring gasket in there....
I believe your's should have 1...
Is there a small Channel in either of the gasket faces,..??
 

fishrdan

Admiral
Joined
Jan 25, 2008
Messages
6,989
Re: Mercruiser #1 3.0 exhaust down pipe gasket?

While cleaning up the mating surfaces I didn't notice any sealer...

hali_nuija.gif


Geez Louise,,, I scraped at the gimble housing but didn't clean it up, there was a n O-ring in there!

Thanks for the info Bond-O!
 
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