Husqavarna model 968999120, id W4815A, sn 021200303, 15hp Kawasaki walk behind. Im not sure of the year, but they built them between 2001- 2009. Reverse is barely working with me helping on flat ground only . When I push the brakes foreword with my thumbs it'll back up a little better. It works fine in forward. I was told this may be a oil filter problem in a earlier post. If this is the problem, what do I need to do to fix it? Also could it be something else, Maybe something serious?
