89 js550 freeze
Posted 26 April 2012 - 06:18 PM
now what should i do?!?!
i dont want to spend a lot of money on a sbt motor, i dont really want to rebuild soo this is my plan and i want you guys to throw your brains on it:) .
- pull motor
- bore to the next piston size ( i think i can bore two more times)
-put a aftermarket head on
- paint and throw it back together.
is there any issues ill have? and is there a fuel pump? i also have no rev limiter and idk if i even need one?
Posted 24 May 2012 - 09:05 AM
Those things are money pits...sell for parts get anewer sx haha
but really I had one and everything is direct conection....check the pump make sure its not jammed or anything...disconnect the motor or pull the motor from the skit then see if it turns over......one of my friends had a bearing sieze up in the pump and locked it up.
If the motor is locked up then you just start from the top work your way down and rebuild it.
If you look on PWCtoday there are tons of old/new parts for those skis floating around I got a new crank pistons cyclinder for 150$. If you are going to be in there replacing pistons I would do the crank put fresh gaskets seals and then do the pistons,cylinder. The aftermarket head isnt worth it that much IMHO...a good exhaust is better and more reliable. The rev limiter was a vacumn limiter on these skis i believe...they are junk and its good its removed. No fuel pump but the carb works of a vacumn system and pulls fuel in.....if anything is leaking on the carb it probably wont run (do a carb rebuild with a new kit if you are worried)
Use the high temp engine paint and go crazy lol I didi mine green like highlighter....got some funny looks at the harbor when I would pull the shell. Put a flush kit on it too..you can make your own.
Posted 04 June 2012 - 11:38 AM
Posted 18 July 2012 - 05:32 PM
Yes the fuel pump is the round assembly sticking off the side of the carb. It is operated by crank case pulses from a line at the block to the rear part of the round pump assembly.
The limiter(when it was in place) was electronically controlled. It richened the mix if it revved to quick. If it is gone, make sure there is an inline restrictor in the return line, or just cut the wires to the limiter and leave it in place. Those carbs need that restriction in the return line, or else they return so much fuel, they cause an overly lean carb mixture.