Sheep ****e. This is SOP in most shops and in many service manuals I have
read this is SOP. I have NEVER seen an impeller fail from petroleum based
oil products. That's just silly. I've done this for many years and with
every kind of engine, make, model you can imagine and what you describe has
never been a problem.



"Sexytom976" wrote in message
oups.com...
One more thing to add here....

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.