77 Puch Newport,
I have absolutely no clue what is going on. It has fuel, spark, and compression, but still will not run. It won't even fire or backfire or anything, even with starting fluid sprayed in the spark plug hole. It's got a brand new spark plug with a big fat spark. If the spark were any bigger, it would solve california's energy problems! It's got enough compression to make the clutch lock mechanism slip. Even if the timing were off, it would backfire or something wouldn't it? But it doesn't. I am dead positive that it has spark. I've checked it upwards of 10 times in 15 minutes. Earlier today it would run and then kill if it went from full throttle to idle too fast, and then wouldn't start again for a few minutes. I cleaned the carb thouroughly, but, like I said, it won't even fire with starting fluid in the combustion chamber (directly sprayed into the plug hole and then the plug quckly put back) and I am VERY MUCH DEAD CERTAIN that it has spark. Watching it while grounded on the engine block, it is very consistent and fat. The compression is definitely there. This one is racking my brain.
Completely out of ideas: