I have put old skanky gas in my truck and it runs just fine.. how many bad gas stories do you hear from modern car engines?I too encountered old, bad gas from neighbor who borrowed tiller my tiller and it wud not start; I removed gas, removed water, tried again, still no hit/ no start; removed and installed MY gas and it fired/ ran fine first pull. I 100% think you are wrong; at MIN, on multi-cylinder injected, I suspect wud generate 300 codes.
As it pertains to small engines guys blame everything on gas or sprakplugs...I have had budies do this when in reality the engine was just flooded.