2.5r won't shift...idles high

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You might have an air leak somewhere causing it to run lean at factory settings which evaporates the fuel in the carburetor causing it do die. You can YouTube how to seal a nitro motor. I use blue rtv sealant for the carb body to block location and then I use it at the backplate location as well. Then I run team associated green slime on the high and low speed needle o rings. If this doesn't work then your motor is toast. Also check the cooling head bolts because those could be loose and causing an air leak.
 

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