I bought 2 skis a couple weeks ago and had one on the lake and it was running amazing for about 45 minutes then stalled and won’t restart. Did a compression test, front cylinder 90psi and rear cylinder is at 120. I have been reading posts on here and realize the top end needs to be rebuilt. I was looking in the shop manual and the bore size is 82 mm with first oversize of 82.25, and no second oversize. Does this mean that the largest it can go is the 82.25? All the sites online to order parts only have .5 oversize kits for it. Thanks in advance for any insight as these are my first pwc and my kids are looking forward to getting on them this summer.
Top end rebuild 1998 GTX rfi
- Thread starter httr4life
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WSM sells pistons all the way up to 1.0mm over in 0.25mm increments.
You can't just buy pistons though, you need to have the machine shop doing the work measure your cylinders and see how much material needs to be cut to clean them up. They will tell you what size pistons to order.
Also you need to find what caused the low compression because if it is a fuel system issue you will ruin the new top end as soon as you take it out.
You can't just buy pistons though, you need to have the machine shop doing the work measure your cylinders and see how much material needs to be cut to clean them up. They will tell you what size pistons to order.
Also you need to find what caused the low compression because if it is a fuel system issue you will ruin the new top end as soon as you take it out.
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