Set the high speed to 3.5-4 turns open from lightly seated. Set the low speed so the screw head is flush with the edge of the throttle arm, then turn it in 1/2-3/4 turn. Set the idle gap to 0.5-0.6mm. The idle gap is probably the most important setting. Too wide of an idle gap coupled with an over-rich idle mixture will lead to flooding pretty easily.

Fill fuel tank, prime engine using the pressure line from the muffler to the tank. Blow into the pressure line and watch the fuel go to the carb. Stop blowing a moment after fuel reaches the carb. Light the glow plug and hit the starter. It should fire right up and be rich. Work the low speed leaner just until it will hold a smooth low idle, then set the high speed needle, and return to the idle needle to get the idle and midrange set. You may need to hold the throttle open 20-30% to get it to start if it’s a little too fat to idle on its own.

Use a medium heat glow plug like an MC8 McCoy.