If you can get a temp guage (I got one from the pawn shop for $40 (original $100) and use that. Or you can buy the little blue one (forgot who makes it) that is used for R/C things.

I run my helicopter at 210°. If you call HeliPros (1-877-435-4776) they will tell you the exact same thing. It doesn't have to be right on 210°, but you can be close to that (210-215°). I wouldn't go over 220-230°.

There is a running temp that all engines should run around. If you don't have the right heat then you don't have the right expansion that the cylinder and piston need to run efficiently. That is with a car engine. You can see if and engine is too hot, then you would get poor performance and if it's too cold the same would happen.

Just run them around 210° and you will be fine. I suggest getting a temp guage. Since I got that one from the pawn shop, I don't know what I would have done without it. I never knew I would use it as much as I am!

I sincerely hope that helps

~Michael~