DL instructions. 2 hours 2500 rpm, 2 hours 3500-4500 rpm, 32:1 lawnboy ashless, 22x8 prop. At least 3 gallons break-in fuel. After these 4 hours you have little over 2 gallons left. I let the engine run for 2 nights while I was watching TV inside. No problem.

1. Set needles as stated in the manual;
2. Run engine for 5 minutes or so;
3. After a cool down, fire it up, let it run hot;
4. Close LS needle 1/8 at a time until the engine starts to surge increasing rpm fast (not full throttle);
5. Open LS 1/8;
6. Complete 4 hours break-in;
7. Run engine hot full throttle and adjust needles again before you put the cowling on.

Needle adjustments after the 4 hours:
Adjust HS needle for max rpm, then open it 1/16 or about 150-200 rpm drop.
Adjust LS as described above.
Repeat because LS and HS influence each other.
Put the cowling on and have fun flying until you're through the 3 gallons.
Remove cowling, mount a 23x8 or 23x10 on a tuned pipe and run one tank of the synthetic gas mixture (e.g. Amsoil Saber 80:1).
Adjust needles again and put the cowling back on and you're all set.