Raw impeller looks weird. Help

[Jetjock15]

15 Z3 with Indamar V drive. Replacing raw impeller first Time at 100 hours. Looks weird as hell all off center. Is this how it supposed to look. Blades like look fine but replacing anyway. The offset has me worried

[Jetdriver]

That's normal. The housing is shaped oblong so the blades have to try to compress the water speeding it up and creating suction.
Did those chunks come off pulling it out or is that what it looked like after pulling the cover?

[Jetjock15]

Thanks for all the help as I go thru FNG status Jet. Chunks were from me, bit#%* to get out. Was in perfect shape but at 100 hours and second season, overdue for replacement according to manual.

[lee]

Liquid soap will make it easier to remove and replace.

[Bakes5]

Get an impeller puller. Makes the job "easy"

[Jetjock15]

Thanks guys. Soap on the fins sounds like great idea. Can I put a little grease or anti-seize on the shaft?

[ericinmich]

I don't like the way one finger is pointing the wrong way. Was intlike this when you opened it up or did you just install it? If you just put it in I would think it would fix itself.

[Jetjock15]

That's after I had been yanking in it and twisting so I probably did that. That's the old one on way out.

[IDBoating]

I use the pulley and shaft to twist out the old impeller. And to twist in the new one, too. Works perfect, no extra tools needed, reduces risk of damage, and you have it right there anyway!

A bit of spit on the new impeller eases insertion, too.

[UNSTUCK]

I use the pulley and shaft to twist out the old impeller. And to twist in the new one, too. Works perfect, no extra tools needed, reduces risk of damage, and you have it right there anyway!

A bit of spit on the new impeller eases insertion, too.

How do you do this?

[freeheel4life]

Guessing a P CM or mere as those aren't crank driven, but rather pulley driven so when you split them in half you have pulley and shaft in hand. Does usually pretty good. Crank driven deserves a puller all day. Will pay for itself when you do your impeller I'm 100 hours. Depending on when you bought your boat and how much you are using its worth just doing one every year. 50$ and a bit of your time is a lot cheaper than overheats that don't get caught soon enough in the water.

[chpthril]

Like a turbo, water is compressed as it travels around the pump housing and exits with pressure compared to the vacuum it has on the inlet side.

[IDBoating]

Guessing a P CM or mere as those aren't crank driven, but rather pulley driven so when you split them in half you have pulley and shaft in hand. Does usually pretty good.

Bingo! PCM is pulley driven... remove three bolts and it falls into your hand. But put it slightly back in and you can rotate the pulley to rotate the impeller right out (or in). Could not be simpler.

50$ and a bit of your time is a lot cheaper than overheats that don't get caught soon enough in the water.

Amen. I put in a fresh one every year, and keep the old one as a backup. The old one always looks brand new. I also do LOF's and the transmission fluid every 50 hours like clockwork, and again just before storage regardless of hours. Some say I'm overdoing it, but I'd much rather do maintenance at MY convenience than whenever something decides to randomly fail.

[lee]

Can I put a little grease or anti-seize on the shaft?

No

[Jetdriver]

Thanks for all the help as I go thru FNG status Jet. Chunks were from me, bit#%* to get out. Was in perfect shape but at 100 hours and second season, overdue for replacement according to manual.

Pick up one of these bad boys. It makes the job easy and you won't risk damaging the impeller housing sealing surface by using screwdrivers. If you're planning on doing it yourself it's worth its weight in gold. I replace the impeller at the beginning of each season, that way it doesn't sit all winter and take a set. It's cheap insurance.
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