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Author Topic: Water pump impeller  (Read 1665 times)

Offline TSLPE

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Water pump impeller
« on: July 31, 2024, 08:48:48 AM »
Buddy has a Yamaha 9.9 4 stroke. Can't get the lower unit to separate to get to impeller. Believe it just has the 4 bolts and the shift linkage. Have watched numerous you tube videos. Shouldn't be that hard to separate them. Any ideas to get them apart?

Offline Mtnwalker

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Re: Water pump impeller
« Reply #1 on: July 31, 2024, 08:53:10 AM »
Does it have the zinc on the underneath of the anti cav plate? My bigger motor has a hidden bolt under that

Offline Crunchy

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Re: Water pump impeller
« Reply #2 on: July 31, 2024, 08:58:59 AM »
I just checked mine out and looks to be correct.  4 bolts and linkage.

Offline fishngamereaper

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Re: Water pump impeller
« Reply #3 on: July 31, 2024, 09:47:26 AM »
Shaft spline is probably corroded.
PB blaster
Put it back together. Run it and warm it up. Work the linkage
Immediately try and disassemble.

Offline HntnFsh

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Re: Water pump impeller
« Reply #4 on: July 31, 2024, 11:01:25 AM »
Tap around the lower unit with a dead blow or rubber mallet. Even tapping down on the cavitation plate. You can smack them pretty good, but be careful and don't abuse it. It'll come off. Just need to get it started. I usually work around the lower part of the lower unit. It puts mire force up high without a ton of abuse. Tap. Side to side and front to back also.

 


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