04-17-2015, 05:30 PM #1
Attention: Owners of 2013 and newer Yamaha SHO/SVHO skis please read!!!
It appears on the 2012 & older SC covers, the volute on the front supercharger cover is pressed in & pinned to help prevent it from walking back against the impeller.
On the 2013 & newer SC covers, the volutes are only pressed in. I know of a few cases of the 2013 & newer covers (SHO and SVHO) where the volute "walks" back against the SC impeller. I have only seen this on higher boost applications so far. Currently I have not seen any stock SC covers do this. Just want to give everybody a heads up on this. I'm not saying there is a mass epidemic of this. As of today, there have been only a few that I've heard about. I Don't want to cause a panic out there, but if you plan on pushing high boost with one of the non pinned covers, you might want to think about drill, tap & install a screw to pin the volute in place.
Hope this helps!
04-17-2015, 05:52 PM #2
How would the front cover walk back against the impeller if it's already bolted down tight the supercharger itself?
04-17-2015, 06:21 PM #3
- Join Date
- Mar 2014
- Siesta Key, Fl
its the volute inside that walks back
04-17-2015, 07:22 PM #4
04-17-2015, 07:48 PM #5
04-17-2015, 08:23 PM #6
04-17-2015, 08:55 PM #7
04-17-2015, 09:01 PM #8
if im not mistaken there was a member with this problem already ,never followed so im not sure about the outcome .
04-18-2015, 08:14 AM #9
04-30-2015, 04:35 PM #10
I just did this mod. Easy to do. Drilled and taped cover for 6-32 SS screw. Not going anywhere now.
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