Traxxas nitro rustler

[Smc86]

Ok I have a nitro rustler 2.5 engine having problems with it revving high rpms when sitting still ripped out 2 new spur gears it has a new carb on it new fuel lines new clutch engine is only 2 years old ran a gallon through it buddy thinks it's sucking air through crank seals they look good to me though idk I'm lost and need help why it's revving high

 

[cbaker65]

Ok I have a nitro rustler 2.5 engine having problems with it revving high rpms when sitting still ripped out 2 new spur gears it has a new carb on it new fuel lines new clutch engine is only 2 years old ran a gallon through it buddy thinks it's sucking air through crank seals they look good to me though idk I'm lost and need help why it's revving high

What is the appearance of the engine look like ,is it all caked up with fuel residue?
If it is ,then that is a sign of leakage some where ,could be a leaky head or even a crack block!

 

[Smc86]

What is the appearance of the engine look like ,is it all caked up with fuel residue?
If it is ,then that is a sign of leakage some where ,could be a leaky head or even a crack block!

There's no fuel residue on Block anywhere didn't see any cracks on it either do u think I need new head shims maybe idk

 

[Greywolf74]

Ok I have a nitro rustler 2.5 engine having problems with it revving high rpms when sitting still ripped out 2 new spur gears it has a new carb on it new fuel lines new clutch engine is only 2 years old ran a gallon through it buddy thinks it's sucking air through crank seals they look good to me though idk I'm lost and need help why it's revving high

Id make sure the engine and carb are sealed if you havent already (VIDEO LINK)

Also repeatedly stripping spur gears a lot of times can be caused by excessive drag in the driveline. Id check all your bearings in the transmission and wheel hubs to see if any of the bearings need replaced.

 

[Smc86]

Id make sure the engine and carb are sealed if you havent already (VIDEO LINK)

Also repeatedly stripping spur gears a lot of times can be caused by excessive drag in the driveline. Id check all your bearings in the transmission and wheel hubs to see if any of the bearings need replaced.

Ok ill check it out tonight and see if bearings are bad but I'm pretty sure there good there's a air leak somewhere can't figure out where guess I'll have to seal it it