Ask 100 people on the "correct" break in procedure, and you'll get 100 different answers. I break mine in the way I'm gonna run 'em, which on a tractor is at WFO, (mower decks works best at full throttle as well, though some people will run them slower thinking they are saving something, hydraulic attachments is a different situation) just didn't sustain it under full fuel conditions. Vary the load, vary the rpm when possible, but mostly full throttle here. Runs fine, doesn't burn a lick of oil. Broke in a lot of engines over the last 60 years, had the same results every time.