Water Pump kit o rings

captaindad3

Recruit
Joined
Jun 12, 2011
Messages
4
I torn down my 1989 Johnson 140 HP outboard before Christmas to rebuild water pump. Put it back together today and may have switched o-rings. Where does the fattest O-ring go in the water pump? I put a narrower one under the impeller on top of the flat plate and am now thinking that is where the fattest o-ring was supposed to go. Anyone sure? Maybe the fat one goes on top of impeller housing?
 

James R

Commander
Joined
Feb 1, 2007
Messages
2,660
Re: Water Pump kit o rings

You are correct the fat one goes under the Impeller. Of course it depends on what you mean by fat. As far as I know there is only one 'O' ring in the pump set up. What Impeller did you purchase.
 

Bosunsmate

Admiral
Joined
Apr 7, 2012
Messages
6,129
Re: Water Pump kit o rings

You probably have one for the top of the driveshaft in there too
310585 O ring drivehaft to crankshaft
 

petvetdoc

Seaman Apprentice
Joined
Sep 13, 2012
Messages
39
Re: Water Pump kit o rings

Thanks, Went back and switched them. The thinner o ring I put on the driveshaft.
 
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