Need Help Drive shaft sticking out of impellor

[Mr Africa]

Hi Guy's

I need some info or help. If you look at the photo's that i attached. You are looking from the intake saide of the impellor (removed intake grate).

I have a problem with cavitation when taking off or when doing a sharp turn then getting onto the throttle. I have checked carbon seal and boot all correct, i then checked wearing and impellor clearence. I have about 0.70mm clearence which is not great but it is in specification according to the manual.

When playing around i found that the drive shaft had play in it ( up down left right) When i run my ski out of water it makes a racket ( i know it is common) and the noise is this cause when you move it around it makes the same sound. So i got my camera and took a couple pics as i couldn't see to well.

My drive shaft seems to be half way out the impellor. Surely this is not normal. What i could feel i couldn't feel any movement on the empellor itself but definately on the drive shaft. Could it be to short or what.

I am really lost and i couldn't get any info from the shop manual that I have for it.

Thanks Guys
Andrew H

 

[Chester]

Well to start with, your wear ring has to be replaced. No need to measure the clearance, just look at the grooves in it. You are missing the impeller boot that goes on the front of the impeller. You might also be missing the rubber bumper plugs that mount on either end of the drive shaft.

Chester

 

[Mr Africa]

Hey Chester

This comes from the seadoo agent after the accident and i was told that the wear ring was replaced and the impellor rebuilt. I have only done about 3 hours on the ski since getting it back ( twice in the water). I guess they were :bs:ing.

Is it important that the rubber boot is missing and the bumper plugs. What sought of damage could that do. Is it normal for the drive shaft to be out so much. Can you purchase this seperately.

The driveshaft has play side ways and up down play is that normal.

This is the kak that a person has to put up with in South Africa or are all seadoo agents this bad. I am in two minds to send it back to them cause my luck they will just stuff it up.:banghead:

Thanks again

Andrew H

 

[Rampage]

Pull your pump off the back then pull the driveshaft out.. check to make sure the rubber bumpers are on both ends. That wear ring def does not look new to me.

 

[RFoster130]

Yeah I agree with the others. It sounds like the rubber bumpers are missing off the end of the shaft. I think someone is BS ing you for sure. That wear ring is not new at all. If so you got something stuck in it and did some damage to the point it needs replaced. You would remember that. I would go back to who did the work. They have some explaining to do.

 

[Rampage]

I had one other thought also...did they have to re-align your motor? If they did or did not I would check placement of it....if its not far enough back it will not use all the driveshaft splines. I loosened mine and slid it back when we put new motor mounts in my GTI... with the cavitation issue, and stuff this all can be caused by poor eng alignment. Also if the eng is not aligned properly it can chew up a wear ring.

 

[Mr Africa]

Hi Guys

The motor was never removed from the ski. When the ski came off the trailer and went down the bank it got sand grass and stones in through the intake grate. I didn't even look underneath and started the engine up. the engine was fine but by then i realised something was somewhere it shouldn't be. When it was taken down to them i showed them and in the insurence claim the were supposed to have rebuilt impellor and replace wear ring. The damage was mostly cosmetic and the hull was recoated and painted. They never even covered the pump assembly as it is full of over spray.

The missing rubber in the impellor and the bumper rubbers inside what is the damage if it is not there.
What sought of damaged if there is side to side movement on the driveshaft and impellor (when moving it around it clanks)

Thanks
Andrew H

 

[Rampage]

check your motor mounts... a hard hit like falling off a trailer can knock them out of place or mess them up. I messed mine up just jumping waves.

 

[Mr Africa]

Okay
So how the hell do i check something like that. Can it be done by eye or there a special tool that is needed. I am using it on new years day at the dam so is there a quick check that can be done and how.

Shot
Andrew H
:stupid:

 

[Rampage]

I did mine by eye. Get a flash light and look at each one. You should be able to see if there are some marks if they moved. There is a bunch of shims under each one (dont mess with those). They do make a special alignment tool, but I never used it. BTW Im just giving you ideas based on my experiences.

 

[Mr Africa]

Hi

You say you did yours by eye. Did you stick the driveshaft in and just judged that it looked straight coming out the back.

By looking at the pics you don't think that there might be excessive wear between the impellor and driveshaft.

I will look tomorrow at the mountings.

Thanks
Andrew H

 

[Rampage]

Hi

You say you did yours by eye. Did you stick the driveshaft in and just judged that it looked straight coming out the back.

By looking at the pics you don't think that there might be excessive wear between the impellor and driveshaft.

I will look tomorrow at the mountings.

Thanks
Andrew H

As you make adjustments, run your finger around your carbon seal, you will be able to feel if it is not perfectly flush.( this is for up down side to side adjustment)....but for back and forth I just slid mine back until all my splines where nice and snug on both ends. I will see if I can get a picture on mine...from the same angle you took your pic from, just to compare.

One other quick note...everything is together in the ski. My pump and everything was installed when I did the adjustment. You only have to lossen the bolts a little then move it back

 

[Mr Africa]

Hi
That is great information. reading that i did notice when i was checking the carbon ring seal that it was slightly off ( not 100% in-line with steel ring).

I will definatley check it tomorrow.

Thanks for your help.
I will appreciate the pics when you can.

Thanks
Andrew H

 

[Rampage]

I meant to get you pics last night and my camera was dead. I did get under and look at mine. You def are missing the rubber boot on the end of the driveshaft. I will get you a pic tonight.

 

[Mr Africa]

Hey bud

Took the pump off tonight as i am sending it down to the guys to replace the wearing and to check impellor. They came with BS saying that the mechanic was supposed to do it and he left without doing it ....yada yada yada.

I checked the mountings and all seem to be in order. I see that one side has one shim while the other side has two.

On my impellor the boot and ring is missing, will that give me that clanking sound and will it stop the side to side and up and down movement once installed. I have check and the rubber bumper is in the drive shaft and in good condition.

When the pump is out the drive shaft has a lot of play on it ( up, down, left to right) is this normal. Doesn't it have a minimuim clearence or does it hold straight between the pump and the flywheel.

Thanks
Andrew H

 

[greyrider]

With the pump off it Will have play in all directions...
good luck
bobby

 

[Mr Africa]

Bent driveshaft

Hi Bobby

Pulled the jet pump off and removed the driveshaft to check splines.
Found the shaft was bent. Took it to the engineers to test and it has bowed with a difference between 1.2mm all the way to 2.3mm. I assume that is why it was sticking out of the impeller about half way.

The funning thing is that i expected that if the shaft was to bend by sucking something that it would distort and not basically bend like a bow (from bow and arrow) The engineer marked it off for me and it is like drawing a line down the middle of the shaft where it has bent out.
Call me stupid but i didn't feel a vibration that I know of but hey i ain't even been accused of being a sensative type of guy.
So now I am looking for a driveshaft.

From
Andrew H

 

[Chester]

It might be easier for you to get your drive shaft straightened.

Chester

 

[Mr Africa]

Hey Chester

I asked the guy at the engineering shop if he could but he said he couldn't.

I still thought about machining it down a bit just to get most of it off but then it would become to weak so I guess I am going to have to replace it.
At least I will be able to make an Impeller removal tool out of the old shaft.

The guys here where I live ain't the sharpest tool in the shed. The town I live in is mostly made up of the farming community and I am a city boy, that contracts to the goverment.

I have a good lead for a second hand part from one of the members on the forum so if i can get a part cheap enough as the shipping costs a bit.

Here in South Africa there are no second hand spares as the guys here fix everything until it can't be fixed anymore.

I have sent the jet pump back to the guys that were supposed to do it in the first place and they are to replace wearing and redo the impellor.
Would I have to realign the engine or should it be fine and if I do have to is there an easier way than the special tool.

Thanks
Andrew H

 

[Bills86e]

Ask "the guys" at shop if you could see their alignment tool. If they're worth their
salt, they will use one.

 

[Mr Africa]

HI

Wha do you mean "alignment tool". What do they use it for.

I found a guy that does fabricated welding and propshaft balancing and alignment. So I have asked him. Said he will try to bend back into shape.

I will found out tomorrow.

 

[Mr Africa]

Hey Chester

I found a guy that does propshaft rebuild and balancing.
Asked him to give it a try and see if he can get it back in line.

Said he might damaged it but will try. Said he must, cause i might as well purchase another one anyway.

Might just be some useful people around these bushes. Thanks for giving me and idea to try. You don't think that it could weaken it by bending back.

Shot
Andrew H

 

[Rampage]

there is a guy on here that has tons of used shafts for your ski. I will see if I can find his number for you.

 

[Mr Africa]

Hey Rampage

I would really appreciate it.

Thanks
Andrew H

 

[BMANN06]

I messed mine up just jumping waves.

Just looking at your prof pic no doubt you did ... LOL