The OS 61 weighs in at 23.6 ounces with the muffler. The OS 46 (not the LA) weighs in at 17.2 ounces with the muffler. That's an extra 6 ounces of weight that you may have to compensate for. Additionally, the OS 61 would use a larger prop than you may be able to use on that aircraft (ground clearance). If so, and if you go for a smaller prop, you could spin that engine to bits with over-speed.

I had an OS 61 on my Tiger 60. I played with props and almost destroyed the engine when I went to a smaller diameter than it called for. It screamed.. for sure, but I got nothing out of it other than a lot more noise (not good).

You are probably better off sticking with the recommended size for that plane. Save the OS 61 for something larger... like a Tiger 60 <GRIN>.


DS.