I’m about to throw this thing across the shop! Pressure and vac tested perfect after I put new boot on and recessed the partition wall part of the crank cases. Taped Saran Wrap to the crank case sealing the crank from any chips and worked with a vacuum to pull chips while reliving that part so it wasn’t pushing up on the plastic of the partition wall. Tuned it and it idled fine for quite a while made several test cuts and boom all of a sudden it ran away in the cut just as hot and high as you please. Pretty sure i see streaks on the intake side through the exhaust port. New fuel line,filter, carb kit and carb run for 45 min in ultra sonic all passages clear. New seals and boot. I don’t know what else could possible be leaking or blocking fuel flow.
So after the bench cut report! FAILED!