I have an rc10gt with what i believe to be a blown .18 os cv-rx pull start.
It runs real well till it warms up then it kinda bogs out of idle and dies, so i am assuming i need a new piston/sleeve assembly

Should i just spend the extra 35 bucks and get a whole new OS engine or should i just replace the piston and sleeve

Thanks so much
a

If thats only the difference between a new one or rebuilt old one. I would just get a new one, and save the other for spare parts. Or sell the parts on ebay.

Thats my opinion

it depends on how many tanks of fuel u have been thru or how u broke it in. If it doesnt have that much fuel ran thru it i would check the carb seal for sure and seal it with red trv from permatex all around the base and the backplate if u have took that off. my friend ahd a trx.15 and it ran awesome till it warmed all the way up so we sealeds the carb good and no more prob's. but if u have ran a few gallons thru that your prob time for a rebuild my man.

Spin the flywheel. When you spin it is it loos or kinda tight? If its loos then the motor is gone. Tight the motor is still there but sounds like a tuning/ air leek.