Oh don't get me wrong, it's only the FL-70 that I wouldn't have (well, the LA engines too. same reason). But almost every other engine I own is an OS!!! I have 1 25 FSR, 1 25 FX, 2 40 FSR's, 4 46 FX's, 2 46 AX's,1 FS-52 4-stroke, 3 61 FX's, 1 91 FX, 1 FS-91 4-stroke, and 1 FS 120 4-stroke. I love OS engines, just not the ones with air bleed carbs!!!!

Ken