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 Post subject: Impellor replacement
PostPosted: 16 Feb 2007 12:06 
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Midshipman

Joined: 30 Oct 2006 15:40
Posts: 63
Hi again. I have had lots of trouble replacing my impellor.

I have replaced the machanical fuel pump so the plate of the back of the Jabsco pump is now easier to access. I can remove the cover plate, but then can't get the impellor out without removing the pump entirely. I am getting tired of doing this.

The impellor pullers that I have found only fit larger sizes.

Does anyone have a solution or other ideas?

Jammin'
#226


 
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 Post subject: Re: Impellor replacement
PostPosted: 16 Feb 2007 15:30 
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Skipper

Joined: 20 Oct 2006 16:10
Posts: 682
Location: Out of Waukegan, IL
It's been a couple years but I don't recall having much of a problem. Nothing a couple offset screwdrivers couldn't solve. (cushion the housing edge before you pry) But I don't know our pump by name... I'm just assuming it's the same.

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1981 - Full Keel - Furling Main (A boat for the lazy crew...)


 
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 Post subject: Re: Impellor replacement
PostPosted: 17 Feb 2007 08:32 
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Skipper

Joined: 21 Oct 2006 15:36
Posts: 268
I just use channel locks. I set the channel lock openning to match the impeller width at the hub, grab the impeller snugly (not too tight to prevent damaging the rubber), wiggle it back and forth and pull. After a while and alot of wiggling it does pull out. .

Jim
Odessey #191

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Jim Voelxen
Odyssey #191
Home Port: Osterville, MA


 
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 Post subject: Re: Impellor replacement
PostPosted: 20 Feb 2007 00:31 
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Rail Meat

Joined: 04 Jan 2007 20:56
Posts: 13
Location: key largo,fl
try a little soap.it will help slip them in and out.


 
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 Post subject: Re: Impellor replacement
PostPosted: 04 Mar 2007 22:04 
Offline
Midshipman

Joined: 24 Oct 2006 16:10
Posts: 61
I was down on the boat today and I thought I might have made a mistake with the placement of the battery box (beneath the pilot berth). I was concerned about the water pump and maintenance of the impeller. As it turns out, the battery box is not the problem. It is the fuel lift pump.

Do folks with a W50 need to remove the pump to swap out the impeller? I seem to remember the W40s I saw had the impeller plate facing forward. My W50 faces aft. Are there any trick? Also can anyone recommend a replacement?

Thanks,
Craig
#231

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Craig Connolly
Recollections
T37 #231


 
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 Post subject: Re: Impellor replacement
PostPosted: 05 Mar 2007 07:18 
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Skipper

Joined: 21 Oct 2006 15:36
Posts: 268
There may be trick, but I haven't found it. I always take the entire pump out. By doing that, I can also inspect the entire pump, and replace all suspect parts. It's not the easiest maintenance task, but after doing it about 6 times, it is getting a little easier.

Jim
Odessey, #191

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Jim Voelxen
Odyssey #191
Home Port: Osterville, MA


 
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 Post subject: Re: Impellor replacement
PostPosted: 30 Mar 2007 15:31 
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Midshipman

Joined: 30 Oct 2006 15:40
Posts: 63
I replaced my old mechanical fuel pump with an electric pump. I added a switch to run the pump with the engine off for bleeding. Eliminating the fuel lines gave me access to the back of the raw water pump at the same time.

If you want more info on the fuel pump I can supply a write up.

Jerry
JAMMIN #226


 
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 Post subject: Re: Impellor replacement
PostPosted: 25 May 2007 07:17 
Offline
Midshipman

Joined: 30 Oct 2006 15:40
Posts: 63
I think I have finally learned something about removing the impellor.

When the pump rotates, the small bump on the inside of the impellor bore is jammed against the shoulder of the flat on the pump shaft. This is what makes it hard to remove. If you grip the impellor and twist it in the SAME direction as the pump rotates, it will free the bump from being wedged against the shoulder of the flat. Then it should be easy to pull off. I experimented with a spare pump one day until I learned how to do this. Now maybe I won't have to remove the pump everytime. Afterall, this is why I replaced the old mechanical lift pump.

I also lubricate ALL surfaces of the impellor with a waterproof grease before installation.

Jerry
JAMMIN #226


 
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