Questions on Impeller Replacement

[whitlecj]

I am replacing my impeller on my 2003 SAN with the 330 excalibur motor. The replacement kit includes an o-ring with about an inch and a half diameter. When I removed the old impeller, there was no such o-ring in the assembly. I believe that the o-ring goes between the pump and cover, just behind the cover gasket. Is this correct? To further explain where I think it goes, you would put the new impeller in, put the o-ring against the pump, put the cover gasket on and then the cover with the 4 allen bolts. Does this sound right? Thanks

[whitlecj]

RE: Questions on Impeller Replacement

anyone?

[sgivens]

RE: Questions on Impeller Replacement

I believe you are right. Check to make sure that the old o-ring isn't still stuck in the groove.

[JoeCos]

Have you checked the drawings and diagram of the PCM service manual ?

You can see an exploded diagram view of the impeller & gaskets and o-rings on pages 51 thru 56.

You can get the Service Manual here http://www.pcmengines.com/parts.html

Hope this helps.
Joe

[whitlecj]

Thanks for the link. That will come in handy one day I am sure. In looking at page 52 of manual, it does not even show this oring that I am talking about. The diagram looks exactly like what I took apart when I was removing the old impeller. You can see the impeller kit on this page and it is showing it consisting of 2 items, the impeller and the gasket. I guess they give you the o-ring because the kit can also be used maybe in some other applications that would require the o-ring like for a different motor. Does this sound right.

[whitlecj]

Oh I think I now see what is going on. The same impeller kit is also used for a crank driven raw water pump (I have the belt driven). It can be seen on page 54 of the manual and it does show the o-ring being used but does not show the gasket. So I guess I don't need the O-ring.

[NautiqueJeff]

That's correct. I just did mine too, and I didn't use the o-ring, just the gasket.

[Flux]

Does the gasket hold up pretty well after taking the front plate off??? I gotta do mine too!!! But I am a bit weary of tearing up that gasket.


Those part manuals are golden, thanks PN!!

[Moe]

Ive had that same question whitlecj. My last kit came with the white gasket too, I had no idea what the o-ring was for.

[whitlecj]

Jeff,
Do you normally take the whole pump loose so you can actually get to the thing to change the impeller? I had quite the adventure last night. I had everything changed out without removing the pump (after dropping numerous washers and bolts under the motor) then snap, one of my allen bolts sheared as I was tightening things up. It must have been a week bolt because I did not tighten all that much yet. Anyway, I ended up removing the whole pump to remove the sheared bolt and it seemed like it would be much easier to change everything out that way.

[wakejunky]

When I was wrenching, I always took the pump out off the engine. That way there you can actually get the impellor out and also make sure things go back together properly.

Chris

[SilverSpraySports]

It isn't fun working the pump out from underneath the engine but once you have it out, it is a lot easier to change the impellers.

-Doug