think i found why the square was cavitating. you tell me

[Dubs chops]

okay i took off the pump and the seal between the pump and the hull was chewed up. where can i get another one? anyone have a clue? also the prop looks like it has had acid poured on it, it looks as if it has eroded and ate a rock or two.

 

[Shadow7874]

prop looks ruff. i dunno all that much but id consider a new prop very soon

 

[showmepro1200]

prop looks ruff. i dunno all that much but id consider a new prop very soon

Very soon, like yesterday

The seal is called a pump packing. Yamaha OEM part, you probably wont find it anywhere else. Costs about $19 before taxes normally.

 

[Boris]

Just about any place can get the seal so chose who you like to deal with.
Doesn't cost much at all.

The prop, or what you describe as acid burn is cavitation.
That stocker is toast and should never go back into any ski.

 

[Talsivar]

that stock impeller is crap anyway even if it was in perfect shape.how do the pump vanes look?

 

[tor*p*do]

that prop is toast!

 

[Mouthfulloflake]

that impeller would make a $30K ski run like crap.

throw the impeller away, buy the new packing ring, inspect the pump closely for wear on the veins behind the impeller ( easier after you remove the impeller), sometimes they start to erode from the cavitation also.

 

[Dubs chops]

what would wear look like on the veins?

 

[madoyster]

Put a little tussin on it.:usa2:

 

[augustaf]

what would wear look like on the veins?

chunks busted out of vane edges due to rock ingestion.

 

[YAMA CAT]

what would wear look like on the veins?

Not like this.......

 

[Talsivar]

that would defiantly cause cavitation!

 

[Dubs chops]

do you have to have a tool to get the impeller off?

 

[Andrew1289]

Yes sir, somthing to hold the splines in a vise. It may be reverse threads (righty loosey/ lefty tighty) I cant remeber but very well worth noting. Someone else will chime in here, maybe theres a way to get it off with out the usual tool.

 

[Mouthfulloflake]

impros.com has a write up, and I think shonuff on this site did a write up too.

search for impeller + shonuffs name and Ill bet you will find it, or check the tech faq

 

[Talsivar]

yes reverse threads, and you will probably need the shaft holder tool if it is on tight.

 

[Mouthfulloflake]

found it.

http://x-h2o.com/showthread.php?t=2466&highlight=impeller

 

[Talsivar]

jetskimechanic.com has the tool Yamaha Impeller Wrench (650,701)
16MM Spline
$ 13.95

 

[showmepro1200]

Just about any place can get the seal so chose who you like to deal with.
Doesn't cost much at all.

The prop, or what you describe as acid burn is cavitation.
That stocker is toast and should never go back into any ski.

Just for clarification - I meant it was only a Yamaha OEM part, didn't mean you couldn't get it from outside sources

 

[Bedpost]

How important is the pump packing? mine looks like the one Yama Cat posted..