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Not running right

1105 Views 5 Replies 3 Participants Last post by  SteveCZ
I ran my new-to-me 99 SnoPro this weekend and have a couple of questions. It's not running like it should.
First it kind of hesitates off the line and then it feels like it shifts gears and rockets up to 6500-7000 RPM , but then starts stuttering and will only run at 7000 (about half the time, it does better with new plugs untill you stop and start again)and eventually it will open up and rocket up to 8000. It probably hesitates at 7000 from anywhere from a second (only a couple times) anywhere to maybe 30 seconds. Mostly happened from a stopped start, would do better from a rolling start. Also starts cutting out at full throtle after a while, slmost feels like a plugged fuel filter or something.
Also it's running lean. Changed out the plugs a couple times to make sure.
Now here's my guesses (and I'm no mechanic. This is my first sled in several years)  The hesitation off the line then the shift I'm guessing it might have a dual or Tri helix in it, because the guy said it had a clutch kit in it.
The 7000 RPM thing I'm guessing is the power valves are in need of some cleaning and maybe even the update. I'm not sure if the update's been done to it.  
Also I switched oil from whatever he was running)I forgot to ask) It was red and had a sweet smell,  to Amsoil Synthetic green oil.
I need to know how to turn up the oil so it's not running so lean. Hopefully I didn't hurt the motor any. My friend said I probably didn't. We ran about 80 miles.
Other than all that, it was a great ride!
I would appreciate any of your input. If you could help, I'd greatly appreciate it.
Thanks in advance.
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Thanks Fire Cat!  I really appreciate you taking your time and sharing your knowledge.  
My friend also owns a 99 snopro and I'm getting together with him this weekend and we'll go over it - check the compression, jetting and oil pump. Thanks for letting me know how to turn up the oil pump, because neither of us knew.
Thanks again.
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Fire Cat:
We looked at my sled this weekend. It's got good compression and the updated valves that are fairly clean and the reeds look new. Heard from someone that synthetic oil makes it hard to read the plugs, that must be right, because it's running really rich. Only thing is, my friend didn't know how to re-jet, so I'll either have to learn myself or take it to someone who knows how to do it. The oil pump may need to be turned down too, but we didn't mess with that either. Might be fixed with the jetting.
Thanks again!
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