I just put a G-26 on my kit built Four Star 120. There were no problems in starting or running the engine and it has nice power for the plane. The throttle linkage was a little fussy but it starts easily with my Hobbico electric starter and there was no muffler to buy. Friends have used them successfully and happily in a Sig rascal 110 and the big H9 Clipped wing Taylorcraft.