Bass Fishing Forum

General Bass Boat Discussion => Outboard Motors => Topic started by: DaubsNU1 on August 24, 2020, 04:26:58 PM

Title: 1974 Merc 20hp water impeller is stuck
Post by: DaubsNU1 on August 24, 2020, 04:26:58 PM
Got the lower unit removed from the old Merc. Got the cover off the water pump...but the impeller seems like it's rusted on the drive shaft. 

I've tried soaking with penetrating oil, but it seems to be really stuck on there.

Suggestions how to get it off? Thanks!  Daubs
Title: Re: 1974 Merc 20hp water impeller is stuck
Post by: Dog on August 24, 2020, 09:16:27 PM
Tap it back and forth with a brass drift and a hammer it should loosen. I have had to pry them up a couple of times.
Title: Re: 1974 Merc 20hp water impeller is stuck
Post by: Oldfart9999 on August 25, 2020, 08:29:30 AM
Just be careful so you don't do any damage, use some never seize when you reinstall a new impeller.
Rodney
Title: Re: 1974 Merc 20hp water impeller is stuck
Post by: TNDiver on August 25, 2020, 03:04:18 PM
Never seize is awesome.  I think I have some that is probably over 25 years old and it still works great!
Title: Re: 1974 Merc 20hp water impeller is stuck
Post by: DaubsNU1 on August 26, 2020, 10:07:57 AM
Never seize is a great suggestion! 

I managed to get the impeller off the drive shaft. Got out the dremel and carefully ground through the impeller, making sure not to damage the drive shaft. 

It is off! New parts should be here by Friday!