I put the new lockoff on and it ran well when I first started it, but on subsequent starts reverted to the fuel-starved condition. Through trial and error I've found that I can choke it with my hand while cranking, then pull my hand away and it will start. Sometimes it keeps going, and sometimes it dies. It seems to need a lot of vacuum to gt the regulator going, and once it's started the engine vacuum is enough to keep the propane flowing. It's pretty much the same problem I started with- I think the regulator problem was incidental to the original problem.