Another thing... At least on my FX and LA 46's... If you do need adjustment
be it hi or low settings... The range is very small once your close... So a
click or two can be plenty... I make 1/16-1/8 movements on mine when I
need to, which is not very often... But as said above, change the plug and
try it before adjusting.... And as chuck said D/L the manual that way you
can see where all the adjusting/stop screws are at, plus suggested settings.

http://www.osengines.com/manuals/50s...1fx-manual.pdf