Hey Bill272,
The first time I did it I wound up pulling the engine after I dropped the pump in the bilge I can now do it without even standing on my head Instead of tying this up if you want to hear my method pm me and i'll 'splain to you...it's easy

PM sent...

Go for a Globe blue impeller. These impellers last for many years, in fact, it may outlast your engine!

Have not tried the blue impellers but I change mine every spring. Some years I change them twice the sand from the river gets to them. Not sure the blues will help that. I am still using the stock plastic or phenolic (spelling?) housing. I change housing and impeller and carry a spare you never know. I have found my housing gets worn and that if I don't change it every time my impeller will not last as long. Mine is much easier to change at home in the shop then out on the water.

Para,
Where do you boat that has that much sand or do you use your drives for rotor tillers

been learing to change mine on the boat at the last minute
Last time out at LOTO I qeustioned how much water was comiing out temps were fine but I could tell flow was loww
next time out I had to change it on hte trailer at the marina
took about 1:20 min it is actually easier for my fat a$$ to remove the back seat then climbing in the bilge

mopower> Colorado River - Lake Havasu, roto tiller thats a good one. LOL

Now a question for all who change their own sea water pump impellers. I have the 454 MAG EFI with the seawater pump driven by the engine and coupled to the fuel pump.

The book I have says to remove the whole unit from the engine before breaking down the seawater pump.

I wonder if it is practicle/possible to just take the plastic body off the back of the unit and change the impeller without removing the pump from the engine?

Anybody tried this or have any advise on it?

change them when they puke...i can have the pump off and engine back running in 15 min...i have PLENTY of room to work on the engines...will never own a boat that doesn't...actually we can sleep in there, in the DONZI!...speaking of puking and pump changing.....my x-wife fed the fish while i changed the last one out in 5 footers....started to make me feel a little green hearing it

Boy Audacity,
You two sound like a real good time .I sure would like to party with you animals
Feeding fish...turning green...Hmmmmm
Maybe you should take up golf instead of gulf