Engine won’t start

[Tanka]

So I rebuilt my bottom end on my 50cc China doll and once I put everything together it won’t start.
I pressed in the clutch and hooked a drill to the magneto but no matter how long or how fast I spin it, it won’t turn over.
I added some fuel to the spark plug hole and I do get a few pops however there is a ton of smoke.
the carbuerator isn’t clogged, I speculate it’s because there’s still a bit of marvel mystery oil in the crankcase whenever I rebuilt everything.

 

[Tanka]

When I pause for 30 seconds and go back to the drilling, it pops for a few seconds. But if I constantly hold it down nothing happens

 

[Chainlube]

It could be all kinds of things that keeps it from firing, bad plug or ignition module. You could have a bad air leak or no compression. Try putting a little gas right in the throat of the carb and turn it over and see what happens.
Have you spun it with the plug out? Check it for spark.

 

[wan37]

Pull the plug out. Put plug in spark plug boot lay on head.Then use drill and watch plug and see if your getting spark.

 

[inspectorcritic]

You got the same problem I got time to order a new engine drop the s**t in your boneyard.