Originally Posted by
Soyer
Need some pointer on p5xlt I got it used(I know) in a package deal and this is my first nitro in a decade. It has good compression fairly clean mounted in a tki3. Got a kyosho starter started up fine I let its idle for about half a tank. It's about 40 degrees here gave it a few full throttle punches while on the box it dies and it was stuck tdc, pulled the motor out mounted it to vise to get it unstuckand now it has a very hard punch at tdc. I don't have the tools right not to take it apart and I don't what to strip any screws spins very smooth till it get to the top then it's pinch-free-pinch then on the down stroke. Temp was at 210 when it died. It's to late right now to try to start it up again
That engine is not fully broke in yet. Every time you get that piston stuck, is hurting that engine. Be best to warm that engine to 220-240 or higher, you will get longer lasting engine. Your low end needle seems close enough for now because of good idle. Don't full punch it. "If you need a vise to un-stick it" its too tight. "New" And seems to set on the rich side "good thing" and is loading up to much for "full punches". I would "heat cycle" that engine a few more tanks if it was mine. Then start to lean it out a little at a time. Never full punch a tight engine.