Returned it to horizon and got my money back. Turned out to be nothing but problems. Replaced it with a YS 1.40 and I am SOOOO happy I did. Read all the post on RC Universe on the FG-20
The fg 20 has a little less power than the zenoah 20cc gas 2-stroke.... (I watched 2-funtana 100x with each engine in it. THe fg-20 did well, but the 20cc gas had more musturd)
I hope this wasn't the 1st run of the engine? got to break it in sloooow.. The conrod to crankshaft is the part that must take time it mate the metals...