I'm a new and I need a little help

[pistonslap]

hi guys, nice to meet you all! I'm new to this sport. all my life i'v wanted one of these stand up jet skis and I finally picked one up. its a 1985 js440 but it has a bad crank bearing, I was hoping you guys could help me out. I am wondering what is involved in swapping the newer js550 or 650 in place of the old motor because I saw one on ebay for cheap. any ideas or advice?

 

[Wolf Child]

550 direct bolt up with the e box

 

[pistonslap]

this new learing excites me! what's an e box?

 

[tor*p*do]

electrical box with ignition, etc

 

[pistonslap]

oh cool that makes sence I sappose. thank ye sir! well then I think I will be looking for a 550 engine then

 

[Kennay]

Man, if you're going to install another engine, I'd go with a 650. It requires a bedplate adapter, and some other small things.

Anyone I've ever read about that has done it has loved it

 

[Shonuff]

The 650 will be more fun, the 550 will be on the water faster as it is less of a project.

 

[Boris]

Lots of good used 650's floating around.

 

[Bigfish]

The 650 will be worth the trouble much more reliable than the 550.Better yet go ahead and put a 750 in it:headbang:I built a 550 / 650 conversion years ago it was a fun ski ,mariner pipe ,ported cylinder , cases , 46 sbn ,dales ignition it ran great .Its still around and getting ready to be parted out .


my build http://www.x-h2o.com/threads/34508

 

[pistonslap]

well I'm no stranger to fabrication so I think I will go with the 650 or 750.
Are the 650 and 750 the same block? or is are they different?

GO BIG OR GO HOME!!:fing02:

 

[FreestyleFreak]

motors

The 650 and small pin 750 motors are the same size i believe.You will need a conversion bed plate i think.I would go with 650 electrics.

and welcome to the best sport ever!:Banane01::Banane01::Banane01::Banane01:

 

[Kennay]

Just about everything you need right here...

http://www.pwctoday.com/showthread.php?t=168187

 

[pistonslap]

do any of you guys have a 650 or 750 engine near saskatoon saskatchewan, or even something they would be able to ship. it would be nice if it needed to be rebuilt because then I can get it cheeper and if I rebuild it then I know what I got im also open to any other engine swaps, I have a 2007 yamaha phazer in my shop, just from looking at it the engine looks like it would fit right in there and thats got 83hp and a 12,500rpm redline with an internal 2:1 reduction on the out put shaft (maybe a little heavier though)