Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
This is a single speed transmission and the speed comes from the two drive belts and the variable pulley between them. Are the two belts tight? Does the variable pulley mover when you moves speed lever or press on the pedal? Is the variable pulley spinning freely , not a bad bearing in the assembly?
# 2 is the variable pulley.
I see question is still open, did you find problem?