There seems to be a variety of opinions regarding the correct fuel to oil ratio for two-strokes, even among those of us with the same engines. When I ran my Minarelli V1 @ 50:1 it backfired constantly. At 33:1 (as specified in the manual) it runs great. Miguel says his Minarelli runs great at 43:1. I suspect that if we traded fuel, both of our peds would run just fine.
Question: What would be the symptoms of a wrong ratio? Why did the 50:1 cause backfiring? Was it damaging the engine?
And what if my mixture is too oil-rich, say, 15:1? Would it run badly, would it foul the plug, would the machine stink like hell? Anyone have experience with the results of bad mixes?