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195 Posts
Hey all, I'm getting a "bog" from 3500-4500 rpm's. Sled is a Yamaha Phazer 485 fan. Anything above 4500 rpms runs fine. One problem I am having, is that my tach cable at the oil pump is leaking. I'm just wondering if oil could have gotten into the primary clutch and if that could be causing the problem, or if it's the carbs. Compression is good, belt tension is good, track tension is good and everything is fine in the rear skid (bearings are good, torsion straps are good, etc.) Fuel is also good. I'm thinking it's one of 3 things.
1.) Primary clutch
2.) Carbourators
3.) Weak diaphragm in fuel pump.
What do you guys think? I'm not a snowmobile guru, and would hate to spend hours cleaning carbs, if it's more than likely the clutch. I have taken apart my secondary clutch, and replaced the plastic dogs hoping that was the problem, but it wasn't.
Thanks for your input.
1.) Primary clutch
2.) Carbourators
3.) Weak diaphragm in fuel pump.
What do you guys think? I'm not a snowmobile guru, and would hate to spend hours cleaning carbs, if it's more than likely the clutch. I have taken apart my secondary clutch, and replaced the plastic dogs hoping that was the problem, but it wasn't.
Thanks for your input.