Turn your hsn in till it hit's the seat.Turn it back out to 2 3/4 to 3.Make sure your lsn is flush with collar and try it.It should be pretty close.Any more than 3 1/4 is to rich.Might wanna throw a new glow plug in aswell.Also make sure your air filter is clean and not overly oiled.To much oil on your filter will make it rich.Good luck and keep us posted on your results.