Old as Dirt!
Join Date: Nov 2008
Location: Tampa Bay Area
Thanked 129 Times in 122 Posts
Rep Power: 7
Re: Raw Water Pump Impeller
Petroleum based lubes should not be used on impellors although, in most cases, they wash out very quickly and so are of little consequence. Silicone grease, however, can be very durable.
I find it is easier to install an impeller when it is, itself, dry and un-greased. I do this using a rubber band doubled around the vanes, which can be folded back slightly (in the correct direction of course). A little silicone grease on the impeller drive shaft and applied to the inside faces of the pump body will make it easy to slip the impeller in place. Once the vanes are partially enclosed within the pump body, the rubber band can be snipped and removed. With that, I use a Q-tip to apply a little silicone lube to the vanes themselves and the inside face of the cover.
With the foregoing technique, I find that our impellers last very well and even after a year or more, look as new (although we do replace them about every 12-13 months to keep on the safe side).
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
Last edited by svHyLyte; 01-23-2013 at 02:33 PM.