I think my motor is shot.

Cold motor- Can turn it over very easy with hand and has a small tight spot up top but not much. Does not make a good healthy thump.

It will still run when the motor is cold but once it gets up in temp (210-215 degrees) it just starts running like shit. example, wont stay runnin, suddenly acts like its not tuned, spitters and sputters.

Anybody got any education they can share.

location is louisiana, humidity is high, elevation is low (our highest elevation is called a hill) temp lately has been about 70-80ish.

Hopefully Ive included all the necessary information.

Definitely sounds like the engine has lost compression. New piston and sleeve will fix that problem up for you. Or, you can just get your piston repinched/resized. There are a few that do them professionally on this board. I actually just sent two p/s to get repinched. Most say it runs like new or sometimes better and will get 3 gallons or so with the new pinch. Hope this helps!

I think imma just hold out till have enough funds for a quality .21. It has a .28 now and I was waiting till it gave out. thanks for the help

It looks like you'll need a new engine

Yep. low compression.

arayracing will do a pinch for ~20 bucks. You can get a few more gallons out of a repinch, assuming it's not too far gone.

How many gallons on the motor now?

No sense in replacing parts or repinching a cheap mill. I'd do like you plan and save up the funds for a better motor. In the meantime just run it until it dies. Run it lean if you have to and don't care about what happens to it. Maybe reseal the carb and backplate to be sure no air is leaking into it and then give it a go.

please use the correct forum next time. i will move your thread to the motor section..

on a engine that losses "all" compression with heat, it is better to run the engine "rich" NOT "lean" as lean will just get it hotter faster which will make LESS compression, rich will keep it cooler and the compression will stay tighter...I will run a pinched engine several times before buying a new p/s...one of my sponsors does pinching locally using rayaracings tooling and I just send him my motor when it starts acting up he snugs it I run it a couple gallons he snugs it again etc etc etc....and to be honest his engines run twice as good as any new engine I have ever owned....

Thanks for the input. I'm just gonna hold out till I can get a new motor. I'm thinking either the B5 or Team Losi CRF that includes the pipe for that engine.

Getting a sleeve pinched is only $15-20. Which is way cheaper and can give you a good backup engine. New .21 will run upwards from x10 that much (~$150+). Just a thought.

TYPO

RayAracing

Recondition-Reize ALL .12 thru .46 engine models

If u dont want pinch sell it as parts engine and buy urself a new engine. Pinch is nice but new is better lol. nothin like a new fancy shinny head stickin out of a dirty car haha.

Polished pinched sleeve is just as good if not better imo... A little research and many, even racers, agree their engines run better than when they were new...

I know lol it was a joke but he posted before hes wanting a new engine because he dont like this one. I think he said it was a 28 and he wants a 21 but dont just wanna junk out an engine.

Yeah I don't wanna just junk it out and do away with it. I think I may look into getting it pinched for a back up motor. I'm not against the idea of a pinched motor but I want something quality, new, in a .21 size. I've read alot of debates between the .21 and the .28, and overall the .21 side wins my decision.