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First recorded activity by BoatBanter: Jun 2007
Posts: 1,635
Default when to change raw water impeller

JimH wrote:
"trainfan1" wrote in message
et...
Short Wave Sportfishing wrote:
On Sun, 16 Sep 2007 21:26:50 -0700, JR North
wrote:

John H. wrote:

On Sat, 15 Sep 2007 18:10:07 -0400, trainfan1
wrote:


Chad wrote:

How often do you change your raw water impellers for your motors?

1973 Evinrude 115: Last changed in 1992.

1981 Evinrude 115: Last changed prior to my purchase in 1997.

1972 Johnson 6: Never changed since new. This one gets the most use.

1973 Correct Craft Ford inboard(~45 hrs./yr): Last changed before my
purchase in 1998.

All used in a sandy bottom shallow lake.
Courage?
lunacy.
The only time I've ever changed an impeller was when I noticed that
the water pressure was a little low on one FICHT I had on the original
Contender. It must have sucked up a piece of sea weed or something.

Changing one every two years is over kill in my opinion.

Other than that, I can't think of a time I've ever changed one other
than an older Merc that I rebuilt one time.

Factory OEM parts last a lot longer too. There are outboards on out lake
from the 50's & 60's that have never had an impeller change-out.

Rob


Until I purchased it in 2005 my 1997 Glastron spent it's entire life on an
inland lake and trailered. Starting in 2005 it's new life was on Lake Erie
with a lot of time anchored near beaches in sandy water. I have to back
over a sand bar to get near the beach, kicking up sand while running in
reverse.

The impellor failed last year causing some major damage to the engine due to
the engine overheating. It also caused me to be towed in twice last year.

I will continue to change mine out every two years. It is cheap insurance
for me.




Is this something you do yourself or do you have a mechanic do it? I've
never owned an I/O, and therefore, obviously, know nothing other than
the generalities, about I/O innards.

In the good old days, my father let me change the impellers on the lower
units of customer outboards, but in those days it was a simple,
straightforward mechanical operation. These days, I wouldn't attempt
"mechanical" work on a modern, high-tech outboard beyond fluid replacement.