Now this is just anedotal. But running 40:1 will have more oil for lube but changes the ratio to oil to gas therefore making the engine run leaner. The OEM companies will say not to run 40:1 in an item that calls for 50:1 because it will run leaner and hotter which can the cause engine failure. My take is if that little change in ratio causes problems, there was a problem to start with.
I disagree somewhat from that I remember buying a brand new carbureted snowmobile around 2004 I remember in the owners manual for break in first few tanks of gas it stated to add oil to the gas it also had oil injection. I do think by putting excessive amounts of oil in a two stroke you will have significant carbon build up in the engine which will eventually score the cylinders if built up to much. Getting back to a junk Weed Wacker that TB had a bog (dead spot) on the top-end of the power band sounding very similar to when I've blown other two strokes cause they were to lean. So I enriched the h speed screw by unscrewing it went away. Like I've stated previously I called the customer number on it before I screwed around with it was put on hold for almost hr, said f-it and tinkered away. As for the line completely unwinding the bump feeder was jammed. If it had a clutch to engage the shaft it may have been prevented or at minimum would have idled better instead of putting a load on the engine immediately at start up. Maybe I got a Friday special and it was a fluke, and I've got my moneys worth on other cheap box store brand equipment but was so sick of this one I brought it back the day I purchased after many failed attempts to use it and get it running somewhat reliably.
I recommend wearing a tinfoil hat when operating lolWhat the heck is that, lol. “Hey honey, look at what I came up with after my 11th beer“.
