Modern fuel , which is nothing like petrol , is conductive at engine compression levels so unless that plug is burned dry ( nothing you can spray on it will clean it ) there is very little chance of it starting
On a battery start engine you can hold the plug cap 1/2 away from the plug to force it to produce a spark but that is a tad difficult to do on a pull start unless you are one of the alien extras used in "Men in Black ".
So with a nice new properly gapped plug give the engine a short shot of starting fluid down the plug hole & pull the starter
No joy then remove the kill wire from the coil & try again
Get back with the results