I have a 97 SS 750, its completly bone stock. For some reason it runs fine then you go thru some chop or somthing that vibrates it and it stalls out. I had the pump resealed and checked out but it dident help. I can cut it off and rock it back and forth and let it set and it might run and not. The ski revs up and shakes terrible and just barly plows thru the water. It might take off for a thought but stalls back. I have to admit Me and my Brother cracked the footwells in the back. Now we patched it and put down more than enough and it is stronger than ever. My guy that does my engine work says it sucking air somewhere on the deck. But still the pump is sealed up inside right? Im at a loss. If anyone can help or knows anthing please help.