Quite possibly the brake is releasing too late.

We are having the same problem and cannot find how to adjust the clutch or brake. Does anyone have a link to a site that shows how to make an adjustment to either or both?

You might try searspartsdirect.com and select manuals. In a nut shell, you will need to know that the brake is releasing easily first. The main caliper is at the end of the brake rod at the transaxle. The nut in the center of the arm is the main caliper adjustment. Before doing an adjustment, you will need to know that the arm moves freely to release the pins which push on the pads. That whole mechanism must work freely including the little brake disc on the shaft should wiggle w/o the brake being engaged. From there the linkage should allow the brake arm to fully retract and the brake arm nut adjusted to a comfortable point. You may need to adjust the nuts that set tension at the end of the arm as well.

Much appreciated!!!