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86mc
07-29-2006, 08:53 PM
Hello:

I purchased an new impeller. I took out the old one which was in rough shape.(10+ years old) How tight should the impeller fit into the housing? It seems if I have the correct impeller that you have to roll the blades flat to fit it in. Is this correct?

Thanks,
Tom

bigmac
07-29-2006, 09:11 PM
Hello:

I purchased an new impeller. I took out the old one which was in rough shape.(10+ years old) How tight should the impeller fit into the housing? It seems if I have the correct impeller that you have to roll the blades flat to fit it in. Is this correct?

Yes, it's a tight fit, and the vanes fold pretty flat at the eccentric part of the housing. At the least, get the impeller sloppy with dish soap, food grade silicone oil is better IMHO. Rotate it in in the direction the pump turns until the splines engage then push it backwards all the way. Be careful not to jimmy the pump housing because torquing on it too much will crush the rear pump seal and it will wobble and leak. Lastly, be careful about tightening down the cover bolts - they're brass and will break off easily

86mc
07-30-2006, 04:33 PM
Hello:

I replaced the impeller and hooked to my garden hose and the front plate does not leak. However there is a drip from the back of the impeller housing. Is that ok?

Thanks,
Tom

bigmac
07-30-2006, 05:29 PM
Hello:

I replaced the impeller and hooked to my garden hose and the front plate does not leak. However there is a drip from the back of the impeller housing. Is that ok?

Thanks,
Tom

Usually a drip from the rear of the raw water pump means a bad rear seal. I've not done it, but replacing that seal is reportedly not difficult. The seal is available here (http://www.skidim.com/prodinfo.asp?number=68-5004), from SkiDIM.

Here (http://www.tmcowners.com/teamtalk/attachment.php?attachmentid=11994&d=1153857241)are instrutions for rebuilding the pump - courtesy of Engine Nut