Kaitai 22, The Saito .72 is an excellent choice for a .40 size plane, the crankcase is very narrow and will drop right in most .40 size mounts. I am running a .72 in a .40 size Starduster in a Hangar 9 .40 size metal mount with the clamps. Dropped right in. The new .82 from Saito I believe is still on the same size crankcase and is only slightly heavier according to the adds. Since the Seagull Decathalon builds on the heavy size, the .82 might be the best choice. Of course at our club field, the motto is too much horsepower is just enough. We're at 5000' altitude though. The Saito singles in general are very light for their displacement and output. I want to put the .82 into a Seagull Zero which is sitting in the shop, and am looking for flying reports on this engine.

Best regards from old bird.