Unfortunately thru the years, I have witnessed people using this fluid by the gallon. This is where the problem comes in. A whiff is fine but many just open the spray and let it flood in while cranking the engine. Even witnessesed a blown head gasket from excess use. People are frustrated because there engine won't start, so they go way overboard with that stuff. Some years back we saw a guy using it at the launch ramp, just for fun we looked in the trash can and saw at least a dozen empty starting fluid cans !! I am sure they were not all by the same person, but it does show how carried away people can get with this stuff.Nonsense-----When a 2 stroke is stopped there is oil all over the bearings and between the piston and cylinder bore.----How does a whiff of quick start instantly make that wash away on a cold engine?.----I have stated it many times.----Oil and lubrication in 2 strokes is not well understood.
The lubrication would all be there from the day, week, month before.However no lubrication for the bearings, pistons, etc. so that first start up is going to be dry on the bearings.
the only thing you should be priming a 2-stroke with is a 50:1 mix
And in some models oil gets mixed with the gasoline in a different way (not pre mixed) and in some models the oil never gets mixed with the gasoline at all.You would NEVER , ever damage that motor using a little bit of starter fluid.----Oil / lubrication / mixing gas and oil is just not well understood. these days.
And you are doing it the correct way ! I have had no issues with my oil injected Merc, have been using the same oil as it had originally and it works great since 1992.Never a risk or problem when I mix oil and gas at the marina fuel dock. Put a gallon in the 6 gallon tank. Add the oil while the 5 gallons is pouring into the tank. Best I can do.