Rushford_Ripper

I was tearing down my 650sx today and as I was taking off the pump, I noticed that the drive shaft had alot of play in it because you could move it up and down real easy while it was still in the pump. I took off the pump to find that the shaft moves even more and it slides back and forth through the hull. Could the bearing be bad in the housing that goes through the hull or is there something else to be concerned with? I do not even know how to go about tackling this issue and I am almost ready to re-assemble the ski. Any info is greatly appreciated!!!

550/440

The shaft sliding in the hull, that is the way they were built - they just slide through the bearing housing... the loose feeling in the pump is a different issue. Is the impeller shaft loose in the pump, or is it solid feeling? There is some play in the area where the shaft and the impeller come together, but it should not be "alot"... I know that is a general term, but I don't have the manual right in front of me.

__________________
1991 550sx, 2009 EME Q8, 1993 750sx (Wife's ski), 1998STX, 1994 Waveblaster, 1983 550

Big thanks to Newmiller Machine in Oregon for the great work! (Mcn6 on PWCtoday)

Rushford_Ripper

I can not move the impeller in the wear ring at all (just tried). When it was connected to the drive shaft, you could, however, move it up and down a bit.

550/440

That sounds like you are good then. The drive shaft is a free floating design - like a 550sx or 750sx - it absorbs some shock that way and doesn't put stress on the firewall (like 440 pumps). A little movement of the driveshaft is OK in the impeller - but be sure to check that the splines on the shaft and impeller are not damaged or heavily worn.

__________________
1991 550sx, 2009 EME Q8, 1993 750sx (Wife's ski), 1998STX, 1994 Waveblaster, 1983 550

Big thanks to Newmiller Machine in Oregon for the great work! (Mcn6 on PWCtoday)

Rushford_Ripper

Great news thank you. The splines seem to be in good shape. What a relief haha.

attnondeck

yeah with the engine and pump in, the shaft will be in the correct place and wont move

__________________
Brendan

1990 SN SJ 701 1990 SN Super Jet 650 Winter build
1989 js550
1990 550SX
1990 300SX

Rushford_Ripper

It freaked me out because I did the impeller on my 550 and I assumed the 650 had the same kind of set-up. Guess not.

bkoche

Ya the 650 setup is much easier to use than the 550/440 type setup

__________________
2004 SXR - FPP Wetpipe, Blowsion railcaps, 4deg bars, billet clamps
1994 750sx - Loaded -FOR SALE
1983 JS550 - WC RC520 reed cylinder, WC Head, PJS WB, Dual 38SBNs, WC 750 reed stuffers, WC Stacks, WC 6.5gal tank, FPP Halfpipe, SBT High torque starter, 16.5 Skat, Blueprinted 440 pump, lightened driveshaft, 76mm OP nozzle, Jetsport bulkhead brace, 90wt mod, WC scoop, Rend plate, Rear exhaust, Carbon Fiber

1991 Honda CB750
1976 Suzuki RE5A
1976 Suzuki GT750A
1975 Suzuki GT550M

Rushford_Ripper

Hey here is another question for you guys. On the hull by the pump, there are 2 lines from the pump going into the hull, but there is a third outlet on the hull. Whats that for, nothing is hooked up to it?

550/440

Can you shoot a picture of the 3rd outlet? It could be a dual cooling line, a bilge fitting line, or a "pisser" outlet...

__________________
1991 550sx, 2009 EME Q8, 1993 750sx (Wife's ski), 1998STX, 1994 Waveblaster, 1983 550

Big thanks to Newmiller Machine in Oregon for the great work! (Mcn6 on PWCtoday)