1997.5 GSX jet size don't want to run lean

[Noahsfixingbrokedownskis]

I am rebuilding a seadoo gray ghost 1997.5 GSX. I'm trying to figure out what size jet to use on the carburetor and what size spring to use. Right now it has a 155 and a 77.5, It's my understanding that these skis run lean. I was thinking about going to 162.5 / 77.5 and using 2.0 needle instead of stock 1.8. Any suggestions on a strategy to get it run right? If I make these changes will the pop off be messed up requiring a new spring size or the use of shims. I bought it with 110 compression so I sent it off to be rebuilt a few months ago and hope to have it back this week to put it all back together.

I understand stand that this is a funky model year and many of them burned up. I bought two 98 gsx a red and gray model with a trailer for a very low price where I basically got the gray ghost for free.

 

[tobytd]

P

Thread '1998 GSX-L need help identifying what i have'

Apr 30, 2025

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It appears my 951 is Frankenstein’d together. I have a white exhaust pipe, white exhaust manifold, white rave valve mounts, and white cylinder head. However the cylinder jug and crankcase is silver. The paint on all parts appears to be factory. I removed the engine because I am restoring the entire ski and the number 1 cylinder almost has a hole burnt through...

• PierceAndrews
• Replies: 15
• Forum: 2-Stroke Sea-Doo PWC Forum

Try this…
After looking through the shop manual information, I would keep your 77.5 Low jets. 165 for high.
2.0 NS. 95g spring