ORIGINAL: rcpattern
I've never heard of anyone having problems with the OS 1.60. they are usually fuel flip and fly...what brand fuel were you running? Usually 15% Nitro and an OS Type F plug and they will run forever. Probably the most user friendly 2 stroke I've ever seen. There are a lot of guys running them in competitive setups. I think you will run into vibration problems with the gasser. This plane is a typical ARF and if you get the weight up, and have vibration, it wont last long...it'll shake itself apart...
Arch
Archie is on the money about vibration. No matter the single cyl gassie you choose, it will shake. A soft mount is going to be needed such that some life expectancy for the model may be achieved.
I have the ZDZ40 RE.... it is destined for a pattern plane but I designed and built a soft mount for it (outlined in a thread here on RCU). The 45cc will not have the power numbers the ZDZ has particularly when the ZDZ is run on pipe.
I also agree with Archie and Mikey on the OS160 recommendation. These are really easy engines to run and tune.... I am surprised that you had trouble. Many of us have experience with the 160 so we could definitely help you through the issues. At 275$ it's hard to go wrong with that powerplant
MattK