Does anyone have any tips or tricks when changing the water pump impeller on a 500 EFI mercury racing engine. Also does anyone have the mercury service page that shows how to change it. I would love to know the correct torque for the bolts when I put it back on.

here you go,when reassembling I use grease grease instead of soap, it helps on dry start

I've used a zip-tie around the impeller to keep the arms bent until it gets in the housing, then cut the tie and push it the rest of the way in.

I was always told that using grease would be bad for the rubber impeller? And soap would be the best thing. What gives? Is there a water base grease that is used? Under no way should they be started dry.

I use merc 2-4-c with teflon never any problems

What about KY Jelly? Thats water based. Would that be enough lube for start up. And thanks for the stat page!

Mike

use 24C that what most techs use...and yes merc says to use soap and water because its biodegradable (they used to say 24c till the greenpeacers got involved)


Wouldnt want you to use all the wifes K-Y

My wife thanks you.

http://www.offshoreonly.com/forums/s...d.php?t=108106

GREAT JOB WALLY

Well documented