yes the gap is the throttle barrel stop, the lsn is at 1 to 1-1/2 mm of the brass showing and the hsn is at 4 to 4-1/2 out. the truck after its primed (2 pulls) it starts on one pull. after setting them to this you will fiddle with the hsn so it hits all three speeds( well at least for me) while all the tires are off the ground (hold the rollbar handle and with the truck off the ground floor it then hit the breaks). if it still stalls just adj the barrel idle screw a little at a time. from a stand still the truck will bog a little but now it should idle all day long.btw my temps never went over 210deg. and now i have another prob, the front diff cup broke doing donuts in the lawn but had a blast doing it.