Have 2 GO 3p Race. Both have approx. 3/4 gallon on them. Both having same issue. Lean bog on low. Trying to race tune and when i punch the throttle, boooooooggggggg....richen up the low end and it goes away. With this much run time, shouldn't i be able to lean everything up a bit. Both idle great, but getting the temps up is very difficult. Do i have to wait for the metal pinch to go away a little more? I have a go 5p and never have had any issues. These 2 mills seem to want to tune backwards of every other engine i have. Suggestions/comments.....thanks