While you wait for answers, we may have found some information which could help you.
Success
Message
what to do to slow down the high rev?
Engine runs wide open unless brake pedal is pulled completely back. Why?
Can't get front pulley off yard machine rider?
loose belt?
What size engine is the Classic 35 100cc or 145cc?
How do I tighten the drive cable on a yard machine snow blower?
rebuilding a lawnmower engine?
howcan i fix my rx73 riding mower?
transmission oil ?
How do I adjust the tension on a 42 inch yard machine belt ?
adjust variable mechanism -- how/??
no spark?