As already mentioned, I prefer to remove the water pump from the motor to replace the impeller. My charter boat originally had a B Cummins, now a C Cummins, so I understand tight spaces. Change my water pump now annually. It's easier to do it on a work bench. Part of the exercise is looking for wear on the internal parts and spinning the shaft without the impeller, to check for bearing play.
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
by The Pointer Sisters