Have a new BX2360 with MMM, FEL and rototiller. I have 6 acres, mostly grass and intend to have a 1/4-1/2 acre garden. I'll also be doing lots of landscaping and building a garage. My problem is that I can't get the dial on the MMM to turn all the way to the "TOP" indicator. I see this as important for next spring hen I'll be tilling up the garden. Is there some trick not well documented in the manual, or should I address the problem with my dealer. I really don't want to detach the mower if I don't have to.