Not a mechanic Posted January 30, 2022 Share Posted January 30, 2022 Sled revs high immediately after start up. Cleaned carbs. New plugs. Can idle it down when choke is on otherwise it just throttles right up. Throttle doesn’t seem to be stuck, carb slides are all down until throttle is pulled. Thoughts? Quote Link to comment Share on other sites More sharing options...
Guest Posted February 3, 2022 Share Posted February 3, 2022 Are the slides resting on the idle screws?? I've seen this happen to guys after carb cleaning and usually the throttle cables aren't sitting correctly in the slides and while they close,,they aren't going all the way. BTW welcome Quote Link to comment Share on other sites More sharing options...
Gold Member 800renegaderider Posted February 3, 2022 Gold Member Share Posted February 3, 2022 Does it idle high after warmed up? Did it do this prior to the carb cleaning? Quote Link to comment Share on other sites More sharing options...
snowstorm Posted February 10, 2022 Share Posted February 10, 2022 if the carbs are right then its an air leak making it run lean. crank seals carb boots some thing leaking 1 Quote Link to comment Share on other sites More sharing options...
FrankieJames7 Posted February 10, 2022 Share Posted February 10, 2022 (edited) x2 on air leak. buy starter fluid and spray it around the crankcase area while it is running. it will most likely be by the clutch mount on the crank or the magneto mount on the other end, so if you spray starter fluid in that area and notice the engine revving up, that is where your problem is. fixing it involves taking the engine out, taking cylinders off, pistons, then splitting the crank in the worst case scenario. best case scenario is you take the engine out, and find a shaft seal that is serviceable from the outside, ei just take off the magneto and seeing a bloken seal you can get out and replace with only moderate difficulty. if you blew a seal on the magneto side ive often noticed magnetos get gas and oil and them and then fail so you should keep an eye on that aswell. good luck Edited February 10, 2022 by FrankieJames7 1 Quote Link to comment Share on other sites More sharing options...
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