Yes there is an adjustment on the spring under the tractor inside of frame rail.But be carfull not to loosen it to mutch or tractor will be slow to come to a stop,or may not stop .your owners manual shows the return spring pg.49 hydro neutral spring.this also afects how fast the pedel will return to neutral when you remove your foot.I tightend mine because it was to slow to stop when i removed foot,and sometimes stayed in travel.if you decide to change be carfull ,make small adjustments and try,and try again,take it slow and test from slow to fast travel,make sure it will stop fairly quickly when your foot is removed.be safe and carfull for these little tractors will hurt you just as bad as a realy big one.