The engine has plenty of power, dyno sheet in the Opti manual claims 11 hp a 3600 rpm. I keep the deck belt a little loose so I get a little slip when encountering heavy growth. I just raise the deck and creep along. Last year mowing the same patch of weeds I trashed the belt when a large stick wedged between the deck and blades. I could not hit the switch in time. Anyone know what causes the hydro unit to slowly engage by itself? Sometimes after applying the brake the tractor continues to inch forward or creep in reverse. Also at idle the stationary tractor will move by itself. After mowing for a few minutes everything warms up and it no longer slips into gear by itself. The linkage seems to be adjusted property. Hit the brake the control lever goes to neutral position and the tractor stops. Neutral forward and reverse position seems correct. I did have trouble with the release valves weeping hydro oil when I 1st got the tractor. I took them out cleaned them with carb cleaner and compressed air, changed filter and new hytran.
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