I'm not sure of the specs on this thing, but damn... this has to be the strongest Black&Decker motor. Ever. In the history of weedeaters. In the world.
I go through so many belts in this thing every year, that I order them two at a time.
Look at what the motor did to that poor, harmless, $7.00 belt.
Even though there are no valves, always be in the habit of of lining up the timing marks (that I may or may not have made with markers just to take the photo)