Don't buy Magnum,Thunder Tiger or ASP.They are only good for the 1st few months..after that they will give tons of problems. I guess it's a matter of opinion. Many of our club member's happily run Magnum's and Thunder Tiger's with no problems right out of the box. We run gallons of fuel through them. I have three TT .46 pro's and they are easily broken in and very reliable. I have Magnum .40's & .45's that run just as well. Many of my planes are powered by Magnum .61's, 80, & .91 4strokes that are quite reliable and reasonably priced.

I can't speak for ASP motors

On the other hand, I recently purchased an Evo .61 NT and after running a few tanks on a test stand, installed it on a plane I use as a motor mule only to find that the motor will quit after a few minutes of flight time at wide open. The LHS said that they do not run well in cold weather but perfectly in warmer weather (we will see). The average temp here in Iowa hovers between 35 to 40 degrees during the winter. The test plane used is properly set up so there is no fuel draw issues.

Anyone have a similar experience ?