8n with new carb, coil, points, plugs, condenser, solenoid, starter switch. adjusted carb as directed on YT. Kicked in pto with brush hog. At half throttle everything ok, full throttle it misses and will die. Have timed it by sound, their are no marks on flywheel for my timing light. the distributor is set all the way forward to sound correct. Another issue is it will only start if jumped from truck and has to be choked each time hot or cold. Need some advice, thank you.