Super Jet Need help shimming my pump...

[Liquid Graffix]

I know I need to install it and get the shaft as close to center as possible, but as far as the shims go - do they go in the 2 mounting bolts closest to the nozzle or the 2 bolts closest to the pump shoe??? Which is the front and back?? (Guess it depends on how you look at it)

Thanx-

 

[deftons56]

nozzle

 

[Tyler Zane]

depends on where you need to move the shaft. if it needs to go down you will need to put shims in the shaft side. if it needs to go up then you need to put them in the nozzle side.

 

[Liquid Graffix]

depends on where you need to move the shaft. if it needs to go down you will need to put shims in the shaft side. if it needs to go up then you need to put them in the nozzle side.

That makes the most sense, but I read this:

 

[kevbo]

Tighten the front bolts and use the mid shaft to determine the pumps neutral angle. Shim the nozzle mounts to maintain this angle. There may be some extra clearance around the nozzle so always loosen the four through bolts to see if it will slide up to meet the hull without shimming.

 

[Liquid Graffix]

Thank you

 

[Tyler Zane]

i had to put shims in the front and rear to bring the entire pump down. i dont care if people say dont put them in the front or not. the angle wouldnt have been flat if i only added to the rear.

 

[Watty]

I install the pump and then slide the mod shaft housing on. If it slides right on and into the dow pin holes without lifting, I know it's right. You can allow for a light amount of lifting because of the weight of the bearing housing sagging the driveshaft slightly too. Even if the pump has only shims in the rear most holes, and it angles the shaft up, you shim the bearing housing and engine to suit.

 

[Tyler Zane]

I install the pump and then slide the mod shaft housing on. If it slides right on and into the dow pin holes without lifting, I know it's right. You can allow for a light amount of lifting because of the weight of the bearing housing sagging the driveshaft slightly too. Even if the pump has only shims in the rear most holes, and it angles the shaft up, you shim the bearing housing and engine to suit.

if i would of only put shims in the rear i would of had to shim the hell out of my motor. less shims where needed this way.

are there really people that shim there mid shaft? that just dosnt seem right, it needs to sit pretty flat to seal.

 

[Watty]

Nearly every ski I do has shims in the rear, just like most Superjets do when you buy them new. It's not a matter of how many shims, it's what you need to do to align your driveline so you don't flog out the splines, coupler rubbers, bearings, and seals.

Yes, I've shimmed the mid shaft, the rubber seal in the rear is pretty good at sealing up the gaps, even when you shim. After all, it only keep water out of the hull from the drive shaft tube.

 

[Tyler Zane]

Nearly every ski I do has shims in the rear, just like most Superjets do when you buy them new. It's not a matter of how many shims, it's what you need to do to align your driveline so you don't flog out the splines, coupler rubbers, bearings, and seals.

Yes, I've shimmed the mid shaft, the rubber seal in the rear is pretty good at sealing up the gaps, even when you shim. After all, it only keep water out of the hull from the drive shaft tube.

it only seals off the drive shaft tube... lol i guess its no big deal if air gets to your pump while your moving forward and water gets in your engine compartment when your sitting still.

 

[Watty]

it only seals off the drive shaft tube... lol i guess its no big deal if air gets to your pump while your moving forward and water gets in your engine compartment when your sitting still.

Correct...of course it's a big deal if you get water in the engine compartment and your pump cavitates, but that's all that lip does. I'm not playing it down, it's a simple concept just like all the engine does is turn the impeller.