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raw water pump has slow leak pcm 302 |
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Bencruizen76 
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Joined: May-29-2015 Location: wisconsin Status: Offline Points: 77 |
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 Topic: raw water pump has slow leak pcm 302Posted: April-22-2016 at 4:10pm |
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I had my 76 tique running the other day coming out from winterizing and everything is good other than i have a leak coming from the raw water pump, does this mean i need a complete rebuild on it, and if so where do i find the parts. I have tried tightning the 3 bolts and that did not help. is it cheaper to just repace the whole pump?
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JPASS
Grand Poobah 
Joined: June-17-2013 Location: Orlando Status: Offline Points: 2283 |
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Posted: April-22-2016 at 4:15pm |
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Have you confirmed that the leak is not coming from a hose connection and running down the body of the pump? Have you ever replaced the impeller? Could you post some pics of what everything looks like in side and outside of the RWP?
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'92 Correctcraft Ski Nautique
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8122pbrainard
Grand Poobah
Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: April-22-2016 at 4:53pm |
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Jeff,
As JP mentioned, do confirm the actual location of the leak. However, since you said you tried tightening the 3 bolts, it sounds like the leak is coming from the cover plate on the face. Older pumps use a thin paper gasket and newer ones use an O ring.. Take a look. Did you have the pump apart recently for an impeller?. |
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Bencruizen76
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Posted: April-22-2016 at 5:25pm |
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i havent had the pump apart and havent messed with the impeller, i have checked the house clamps tho and they are all tight. I will get it running again and watch closely where the water is coming from.
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63 Skier
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Joined: October-06-2006 Location: Concord, NH Status: Offline Points: 4269 |
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Posted: April-22-2016 at 6:34pm |
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Order an impeller, you should change it if you don't know when it was last changed. That will come with a new gasket or o-ring. When you take it apart look at the mating surfaces of the pump housing and cover to make sure there aren't any grooves or other dings in it that might cause a leak.
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'63 American Skier - '98 Sport Nautique
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Gary S
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Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Posted: April-22-2016 at 7:53pm |
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If you shop around to buy parts for a Sherwood g21 pump you can get them around 100 bucks. A new pump can be bought for around 350 and up
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Bencruizen76
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Posted: April-23-2016 at 12:18pm |
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so I took the pump apart and sure enough the impeller was bad and oring was also, cleaned the pump all up and used some dawn dish soap to put in a new impeller and oring and reassembled , I am gonna start it today and hopefully problem solved. Thank you all for your help, will keep you posted..
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Bencruizen76
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Posted: April-23-2016 at 11:15pm |
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well turns out the raw water pump still leaks.. looks as tho the water is seeping out of the front bearing seal.. what to do next???
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LeftFieldEngineering
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Joined: December-20-2010 Location: Monson, MA Status: Offline Points: 384 |
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Posted: April-23-2016 at 11:27pm |
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Probably the pump seal, mine was laeaking from the front earlier this year. I picked up a major pump rebuild kit, installed new bearings, mechanical pump seal, gaskets, o-rings and new impeller. Works like a charm now.
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8122pbrainard
Grand Poobah
Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: April-24-2016 at 7:33am |
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Jeff,
As Andy mentioned, I agree that it sounds like it's time for a rebuild kit. Even though it may only be a seal problem, you might as well do a major on it since you need to tear it down anyway. |
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