03-02-2008, 10:22 PM #1
- Join Date
- May 2007
S/C Metal washer inspection after ~100hrs of use
Our 2007 Wake Editions seemed to be down on power a little, not quite pulling to the 8000rpm redline, only to about 7400-7600rpm.
So if figured we must need to replace and service the metal supercharger washers we installed when the ski had 16 hours on it. The ski now had 105 hours. So we had put 90hours on the washers. I pulled the supercharger and disassembled the S/C clutch.
Before reinstalling new waskers, spring washes, needle bearing and shims that I ordered from Jerry earlier this week I measured the thickness of the used metal washers and compared it to the replacements using a digital micometer.
- The used ones measure 2.41 millimeters in thickness. They showed a little "gauling" (sp?) on one side of each washers.
- The new ones measure 2.35 millimeters in thickness.
- I also measured the thickness of the actual supercharger drive gear, it was 11.05 millimeters thick after 105hrs, I don't have new one to compare it to? Anyone have one laying around?
I rode the skis for about 3 hours today off the coast of Santa Barbara, and I recovered most of the lost RPM, given the 2-4ft chop, I'd see 7900-8000 rpm on the tach and about 60mph on occasional smooth sections. Granted it still wasn't ideal water conditions.
Nonetheless, since the washers showed so little wear, I'm thinking the replacemnt of the spring washers and shims is the source of extra clamping pressure to get the lost boost/rpm back. Washer wear doesn't seem to be an issue.
Hopefully this data is of some use for you guys to compare...any one with a similar experience on metal washer S/C rebuild?
Last edited by Fly'n Dutchman; 03-02-2008 at 10:25 PM.
03-03-2008, 08:31 AM #2
03-05-2008, 10:48 PM #3
- Join Date
- May 2007
03-05-2008, 11:38 PM #4
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