Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Is the foot pedal hitting the stop or nothing under it to keep it from going full travel? If not, check the linkage going to the hydrostatic lever . Ren=move the linkage at the lever, and move the lever by hand and see if the linkage can go the full travel, Typical hydrostat travel speed is determined by how far the lever on the transmission moves,
Get it up on jack stands and work the transmission motion lever by hand!
!!We were in the 70's yesterday! Thanks for the reply!