2008 kawasaki ultra 250x whining noise

[NMASQUINE]

Good Day,

I have a 2008 Kawasaki ULTRA 250X with 92Hours,

When riding it, I get a very loud whining noise instantly when I accelerate, this noise only appears when I am in the water because when I flush the ski on the trailer there is no noise,

I checked the following:
- Supercharger Belt, stiff and tight and still has good grooves;
- Supercharger Oil, seemed to have very little oil, around half the mark and the oil was very tick kinda sluggish;

I have ordered the following to replace:
- New Supercharger Oil from Kawiperformace
- New Pumb bearings to replace the old ones, not yet upgrading to the 300X pump kit;

What could be the reason for this noise, the more you rev the higher the noise,
Also note that this ski had been stopped for almost a year at a 2nd Hand dealer,

All Assistance and ideas are welcome,

Thanks & Best Regards,

 

[gazzaskirepair]

Check the supercharger tensioner pulley of clutch pulley on supercharger
Both have bearings

 

[gazzaskirepair]

Could also be the through hull bearing or Rear Pto case bearing
These two need engine removal
Sell the machine and buy a Seadoo
The supercharger will cost u a fortune soon

 

[NMASQUINE]

Could also be the through hull bearing or Rear Pto case bearing
These two need engine removal
Sell the machine and buy a Seadoo
The supercharger will cost u a fortune soon

I really like Kawasakis, thats a hard blow to take,

I will check all bearings and get back to you with an update,

Thanks,

 

[gazzaskirepair]

Just speaking from experience
If you haven’t owned it from new then stay away
They need a lot of TLC

 

[NMASQUINE]

Just speaking from experience
If you haven’t owned it from new then stay away
They need a lot of TLC

What is TLC?

 

[gazzaskirepair]

Tender
Loving
Care

To be treated like a baby

 

[NMASQUINE]

Tender
Loving
Care

To be treated like a baby

That is natural to me, hehehe

 

[NMASQUINE]

Good Day Guys,

hope all had a great weekend,

Ok, so i replaced the supercharger oil,spark plugs, oil & oil filter,
- Used new NGK (4717) PMR9B Laser Platinum
- New Kawasaki Ultra 250X oil filter
- 4.5 Lts of oil came out, put 4.5Lts of 10W40 Synthetic Oil (4.5LTS = 0.989 US Gallons = 4.75 Quarts)
- Supercharger Oil from KAWIPERFORMANCE, 4OZ

I put the jet in the water and the whining is still there,
I seem to have lost some top speed because I was doing 112KMS (70MPH) 2 weeks ago and now doing around 86KMS (53MPH), water conditions were pretty much the same and in fact this weekend it was calmer, I also got a burning rubber smell inside the ski, really strong,

My boost was constantly at 10PSI with 3/4 to full throttle and this weekend it was going up and down between 7 to 10PSI,
RPM wise, 2 weeks ago 112KMS @ 7470RPM and this weekend doing only around 6800RPM,

What could be causing it?
I have not yet replaced the Bearings on the pump,

When i take off there is basically a slow acceleration, I hear the engine REV but I take off quite slow, its been like this since I got the ski, after some 10 to 15 seconds it starts to gain speed,

I also noted that there is no water coming out of the side outlet, while riding and while flushing, could it be clogged?

Regards,
Nadeem

 

[gazzaskirepair]

Yes pull your jet pump and check impeller splines and supercharger belt tension

 

[NMASQUINE]

Yes pull your jet pump and check impeller splines and supercharger belt tension

@gazzaskirepair thanks, I will take it out and check,

 

[NMASQUINE]

@gazzaskirepair
Good Day,
I pulled out the guide vane last night and took a look at the splines, impeller and the vane,

The splines on the shaft seem ok and if you pass your finger around them you can clearly feel it,





In the impeller they also seem ok (the splines),




I also found some broken parts on the vane,




Also please see the spacing between the impeller and the guide vane, seems to be too much (could this be the reason I have almost no start acceleration?



Where can I get a good deal on a Guide vane and impeller?

Regards,

 

[gazzaskirepair]

Check
Shop SBT.com
Or
WSM performance parts
I have a unit with twelve hours on it

 

[NMASQUINE]

Check
Shop SBT.com
Or
WSM performance parts
I have a unit with twelve hours on it

@gazzaskirepair
Thanks,

Could this be the reason why i am loosing speed and have almost no take off power?

 

[gazzaskirepair]

No check supercharger belt , clean intercooler and check blow off valve is closed

 

[gazzaskirepair]

You need to resolve your cooling issue fast or you could end up damaging the engine
Try read this but I suspect your oil cooler is blocked
2009 Kawasaki Ultra 260X Cooling system explained!