The screw labled (H) should be the high speed adjustment. The one labeled (L) is the low speed.
Turn the slow speed screw all the way till it stops,
then back it out 1 1/4 to 1 1/2 turns. Also make sure your
carb is clean. You may have to play with the adjustments alittle to get it to run right at low speed.
You should be able to find info on your
saw on the net, also try (arboristsite.com) it's a great
site full of info and many links to others. Good luck.
Ian S.
February 2009