I will start you with the basic settings.
Step 1. "L" (Low Screw)bottom this then unscrew 1 and 1/4 turns.
Step 2. "H" (High Screw) bottom then unscrew one turn.
Step 3. Then put in new spark plug.
Step 4. Then Start the saw and if it run's try to accelerate and if it does not move up in speed then open the "L" but 1/8 of a turn at a time till it does.
Step 5. Once you have done that then you adjust the "H" till the machine run's at it's peek and then open up by 1/8 turn.
If you don't get the saw started then post again and I will give you some more things to check.