ORIGINAL: bigedmustafa
Each of these brands is unique with regard to how to best prop, tune, break-in, fuel, and maintain them.
Even different engines from the same manufacturer run and handle differently.
Rest assured that any pilot who tells you, ''Yep, you should have bought an O.S.'' doesn't know anything about engine tuning,
I can't agree more. I've had Super Tigre for over 30 years, and never wore one out. These like FAI fuel or 5% nitro content at the most. They also like larger props. Set up the engine with the right plug, fuel, prop, and you cannot find a transition issue, an idle issue, or a performance issue with them, certainly not at sea level at 90 degrees anyway. Some insist on just 12X6 props and 15% glow fuel because that's what their LA 65 ran good with on their hobbico trainer RTF.
Super Tigre performance is great for the money. I've never seen a China or Italian made Super Tigre differ in quality as some have commented. I regularly fly the ST .75, fits right in the .61 mount, so does the .90. Price an AX 75 lately? Forget it.
I enjoy using every engine I can find and rarely have issues. Oh, Fox baffles me how they continue to stay in business without a doubt. Never could get their carbs to work. The old days, you just tossed it and threw on a Perry replacement. I do use OS carbs on the G20, ASP, Magnums, when quality goes below average, you know, Monday A.M. and Friday P.M. production never is ideal.