Guys, advices are really welcome here.

Some days ago I got an YS 110FZ-S from the South America E-bay, named Mercado Livre.

It was not a new engine, but it was looking like. It was a very good condiction engine.

So I installed it in my Funtana X 100, using Cool Power 20/20 and I started the flights.

The first flight was very good. Good power with an APC 16x6 sport.

But that was it. I had fun just in the first flight. After that, the engine become a nightmare. Impossible to tune. A massive power lost. The engine was getting overheat each flight, no matter how much I had richen the mix.

Well, without YS experience, I gone too far and I burned the engine. I sent it to a repair service and they told me my engine had the crankshaft warped plus the burned parts...

So, I believe the previous owner made me fool and sold me a crashed engine.

I couldn't find the replacements parts here in Brazil (I will try to import it directly from USA this next year and recover this engine), so I bought a new one for me. This one is really brand new

But I am totaly scared of this new engine right now.

I am afraid to burn this new one too.

I am following very close the manual break in instructions. I've made it run in the ground very rich for 20 minutes. Right now I am doing the 10 break in flights that the manual says about, but I don't know. It seems the engine is getting hot anyway.

Yestarday I made 2 flights. Good power. But when I was landing, I noticed a huge change in the idle. It was very high from the real idle level I took off for a moment and the engine was coming down some seconds after the radio stick.

This behavior is like low speed very poor. I opened it 1/4 of turn and the idle seems to be cool.

But after the flights, the engine seems to become very hot at the hand touch. I know we can't touch a engine that just stop running anyway, but now I am afraid and everything is a reason to make me scared.

Can anybody gives me adivices of how-not-to-burn-you-brand-new-YS-engine?

Does anybody knows the working temperature of the YS? I can mesure it here...

Thanks, guys!