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Noise from motor of Kawasaki U-250

When engine start, this motor has big rattle noise and I found where noise from....

Supercharger pully rubber damper were all came off and this is cause of rattle noise.

Japanese jet ski magazine Oct issue

Introduce 2012 SeaDoo, I want RXP-X Looks cool!

Unfortunately,,,,,, Yamaha GP800R

Dismantled rear cylinder

Connectiong rod has too much free play and looks like big end bearing is missing. See bottom picture that is normal looking of big end bearing. This is the cause of pison top position too low at TDC.

Normally you can see roller bearings and cage of bearings.

This is for flushing connector as someone changed to garden hose connector. Also with this condition always water leak from this connector when ski run on a water, in short must need disconnect this gray joint.  This customer didn't know about this things since he bought this ski until I asked him. What happend this ski's motor?  Motor must be suck spray of water from air box and crank shaft bearing been rust and then bearing didn't turn well or seized as get hot and melt by frictional heat.

So now this motor needs big surgery,,,,,,

Unfortunately,,,,,, Yamaha GP800R

This customer is first own of Jet ski this GP800R but only 4 or 5 ride since he bought now this motor is damaged as rear cylinder has low compression. Removed exhaust sys and cylinder head,,,,,,,
I thought just piston is damaged but piston is looks not too bad and no scratch mark around cylinder sleeve. Oh boy! I thought, Did I fuck up? but compression was too low for sure and crank shaft turn feeling is funny too.

I found piston top position is too low when TDC. This is cause of low compression.

to be continued later

Sea Doo oil filter cap again,,,,

This customer's Sea Doo RXP-X 2008model just used 38hr but sitting in garage last 2year as not use. Paint of motor damaged by corrosion and also oil filter cap was stuck,,,,,

 I struggled to remove cap and I almost give up after spent 15 min then I put WD-40 around cap. After a little while I tried again then cap was slowly came off and finally I did it!