300/440/550 440 or 550 pump?

[crashnburn86]

How do i tell if the pump i have in my random parts box is a 440 or 550 pump? whats the difference? im just getting into kawis and don't really know much about them i built a sj last year. Im in the process of doing a flatdeck 550 with flush mounted custom handlepole. Any suggestions are nice .

 

[john zigler]

550 pumps are three pieces. you have the wear ring, main stator pump area, and then the exit nozzle. the prop 0n a 550 pump screws onto the pump shaft, in the pump stator. there are two different 550 pumps. early 1982 to 1989 JS type, and later 90 to 95 SX type.

440 pumps are two piece. the wear ring, and main pump stator are one unit. the exit nozzle is seperate. on a 440, the prop screws onto the main drive shaft, so there is no pump shaft in a 440 pump.

 

[crashnburn86]

will a 440 pump fit on a 550 hull?

 

[john zigler]

will a 440 pump fit on a 550 hull?

yes, as long as you swap the whole drive line. the 440, and 550 drive shafts are different.

 

[WFO Speedracer]

The pump will fit but you have to have the 440 shaft and impeller to go with the pump,if you are into freestyle stick with the 550 pump and put a decent impeller in it ,it has better hookup at low rpms

 

[crashnburn86]

i was reading another thread and saw someone saying the 440 has better low end? if u put liek a 17-19 pitch prop on the 440?

 

[WFO Speedracer]

i was reading another thread and saw someone saying the 440 has better low end? if u put liek a 17-19 pitch prop on the 440?

do you have any idea what it takes to pull a 17-19 pitch prop on the 440?

 

[crashnburn86]

no clue i dont know anything about 550's r 440's i used to ride a 701 and i sold that now im building a flatdeck 550 im just trying to find out what pump would be best...fill me in

 

[WFO Speedracer]

550 pump produces more thrust at lower rpms,440 pump flows more water and is better for higher rpms and top speeds,for freestyle I would go with a 550 pump and a progressive pitch impeller

 

[crashnburn86]

what pitch impeller?

 

[WFO Speedracer]

Depends on what mods you have done to the motor

 

[Motorheads5]

550 pump produces more thrust at lower rpms,440 pump flows more water and is better for higher rpms and top speeds,for freestyle I would go with a 550 pump and a progressive pitch impeller

Your so smart, no really

 

[WFO Speedracer]

Your so smart, no really

Just trying to help a brutha out!

 

[crashnburn86]

well prob be a high compression head with half pipe exhuast aftermarket water box and a 44 carb the rest stock.... im not really sure what would you suggest to bring the power out of a 550 lol... this is just gonna be my little river run ski ive been wanting to do a flatdeck for a while

 

[Motorheads5]

15 or a 15.5 should be about right IMO

 

[Big Kahuna]

I had great luck with a skat 15.5 straight pitch. Never tried a progressive pitch.

Factory Pipe limited (Half Pipe), Mariner 42mm intake with a Keihin 42mm carb.

 

[jetski9010]

Putting together my 550 project now. Got my motor built up by jetworks and he is telling me to run a 8-16 prop on it. Going to but a freestyle boat.

 

[crashnburn86]

what did jetworks do to the motor and is it a 550 motor? reed or pp? just curious cause im about to purchase a 550 reed

 

[jetski9010]

what did jetworks do to the motor and is it a 550 motor? reed or pp? just curious cause im about to purchase a 550 reed

I got a fresh top end .060 over, full motor port, new crankshaft out of a lazerjet, blackjack 44mm carb, shaved head. The motor is a piston port. I had a goki reed adapters that I was going to put on but Art told me that I might have problems with it coming loose so I just left it off to not have to deal with problems.