1972 25 hp Johnson Water pump question on gaskets?

parratt1

Seaman Apprentice
Joined
Aug 8, 2005
Messages
46
Hey everyone I took off the water pump housing on the motor last night and checked everything over. On the impeller housing there is very very minimal scoring and on the ss plate under the impeller, it is as smooth as a baby's backside so I am making an executive decision and only going to change the impeller instead of the whole housing. Under the ss plate, and where the housing meets the gearcase, there were no gaskets and I see none are called for. However, there was a brown residue on both surfaces, Is that OMC gasket sealing compound? Is that recommended in this case? Thank you and sorry for all of the newbie questions. I searched and try to always before asking new questions but sometimes, I just on't come up with answers i am comfortable with......
 

AlTn

Commander
Joined
Mar 9, 2010
Messages
2,813
probably it's 3M 847 sealant..I put some under the ss plate on the outer edge...I don't think any is called for in the manual
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,226
It is wise to use some sealant under the plate. But not the end of the world if you don't, as long as the surfaces are clean and nick-free. Personally, I seal 'em all.
 
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