starting problem

Called it haha. When you kept focusing on spark I figured we had to get back to basics. You'd be amazed how often something like filling up the gas tank will fix your problems. I was actually going to suggest starter fluid next. Nothing makes an engine fire like dumping starting fluid down it while turning it. Usually makes for a good bang to.

With a shitty filter I'd check your gas tank, make sure its not full of sludge. Modern gas with its ethanol percentage goes bad in like 6 months now. You should see what crap carbs are full of after sitting for a bit.

Glad its running!