The impellors are heavy duty rubber, but do you think
that the put in a special rubber synthetic when its
rated to run in water??? In any case, why take the risk
of damaging it in the first place? Letting the rubber
simply sit in its casing filled with oil until its fired
up isnt the best idea. If its in there long enough it will
soften up and prematurely die.

As for the use of KY. Its NOT suppose to be used as a
long term lubricant. In its sealed casing, the lubricant
will stay there till its fired up and simply disolve when
water gets in there.

By no means are boat parts even come CLOSE to aircraft rated
stuff. Lets face it, having a motor conk out because of a failed
part doesnt come CLOSE to having a aircraft come out of the sky
because of a cheap part. Most likely one of many reasons why
aircraft parts are much more expensive than boat parts.

I really can say anything about other type of non petrolium
lubricants... They could work just fine.

Tom


Tadeusz Jerzy Korsak wrote:
do not EVER, EVER use 2 cycle or any other petrolium
based oil on a water pump impeller. This will
destroy the rubber in no time.

Are you sure?
I think that impellers for positive displacement pumps are made of
high
quality oil-resistant synthetic rubber, not of fragile latex used in
condoms.
In every aircraft, hundreds of rubber parts bathe happily in cold
naphta
fuel, hot oil and hydraulic fluid!
If in doubt, use electronic silicone paste, silicone oil or brake
cylinder
grease but not KY Jelly, it is a water based Sexual Lubricant and it
is
useless in machinery applications, it simply dries after half a hour.
Regards, Tadeusz