Guinea pig 95 XP 717

[ALFONZO PINEDA]

New to site. Enjoying it very much, thank you for all you do. I recently purchased two running seadoos that came with a third non-running ski. Currently I have a pretty long list of maintenance i have learned, from reading threads on this site, my running skies need. Since i am new to working on jetskis, i figured i would use the broken ski as my guinea pig this winter to help me get some practice before working on the others come spring. I have checked the compression on the engine, the guage worked fine when checking the working skies, and it showed to be 30 psi. (Is that even possible or am i doing something wrong.) I have already pulled exhaust system and am going to pull and go through carb. today. I also plan on pulling jet pump and engine. I like getting my hands dirty and am doing it mostly for practice, however i would like to get it running if possible.

Is it possible to have that low compression and still save the engine?
Should i pull the top off engine first and check it or just pull the whole thing?
Are any of the parts interchangable with my other skies if i can't fix this one?

Sorry if i'm rambling or asking to much in one thread but i am chomping at the bit to get started. Thank you in advance for your help.

 

[SabrToothSqrl]

30 PSI? that's no good... but at least it spins and the starter works!

in any case, the engine will need work.... pull the head and get some photos.

 

[Minnetonka4me]

yup its got some bad pistons at the very least.

Def not a bad way to get some practice. These machines are not all that tough once you figure out what tools work well for different areas, and what angle to take to reach it.

People up here cant believe I think working on these are easier than snowmobiles...being freshwater I never deal with corrosion, and they are so much simpler than a sled.

 

[ALFONZO PINEDA]

I finally got permission from the wife to go out and work on the ski. I will attempt to attach some pics. I had some trouble when attempting to remove carbs. Looks like someone cross threaded the bolts.( The last ones before carbs come off ) Does anyone know a good way to get them off. I think i can just cut the heads off and and slid the carbs out, then i will have more bolt to try and grab and turn somehow. The top of the motor came off easily. The cylinders looked ok from the top, but after slideing them off the pistons they have marks on the lower part. I took three of the C-clips off the pistons but am having trouble with the fourth. Can anyone recommend a good tool to use to get it out. The manual recommends using a special tool to remove pistons so the bearing needles don't come out all over the place. Is it worthwhile to purchase the tool or can i just cover the area under the pistons really well and knock the pins out. The housing and everything looks good and there was alot of oil in the bottom end of the engine. I will pull the pump next chance i get and see what else i can tear into. Thanks in advance for any advise.