300/440/550 Help 440/550 Guru's Needed - See video

b.lee

Team Cheeseburger
The 550 was running bad last time I brought it in, but did come in under its own power.
Now it will not start. It will fire up and want to run, but soon as you let off the starter it stops. I've pulled the plugs, and it turns over fine by hand. Nice and smooth. Pulled the tank, drained it and the fuel filter. Put fresh fuel in, no effect. Disconnected waterbox, no effect. Pulled the flywheel cover, everything looks good.

140/135 compression

But it does make this odd sound when spinning over, but it cannot be felt when turning it by hand. It spins freely and easily. See video below

 
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