You can't light gasoline with a spark........................movie guys take liberties with that one
You can only light gasoline VAPOR with a spark
And you need 30% vapor in a cylinder to get it to fire
At 80deg you can smell gasoline, that's the vapor you are smelling
At 30deg................well hard to smell it, so very very little vapor
This is WHY we need to Choke a cold gasoline engine
The choke plate restricts the air flow but engine cranking still pulls in the same amount of "air", so with restricted air it sucks in MORE cold, low vapor, gasoline
The hope is by adding more COLD gasoline you will get at least 30% vapor level in the cylinders, and not WET foul the spark plugs, lol
Ether is a good Cold start fluid because it has a lower vapor point, so spark plug can ignite it at colder temps
The key is heating up the cold gasoline
What you can try, besides starting fluid, is to NOT set the choke right away
Crank the engine over a few times, compression = HEAT, so cranking heats up the cylinders and the spark plugs
Then press gas pedal down one time, setting choke
And then crank again to start, the warmer cylinder will vaporize/heat up the gasoline as it comes in
Also try a wider gap on your spark plugs, this was common thing to do in winter months, reset the choke and regap the spark plugs every winter and summer
Boy I love fuel injection, lol