I just joined the LawnMowerForum. Thanks to all members for your insight. Not sure how much I can contribute, but thanks to all of you for your contributions. I have a 23 year-old JD 170. Lately the blades stop engaging while cutting. Was told most recently that it could be a fuse or stater (I don't know what the stater is) and I don't know where to find the fuses. At first I was told it was my battery, and after having the battery checked and learned it would not hold a charge, I bought a new one. JD worked fine at first, but when I attempted to cut next week, same issue. Now the new battery is dead. Jump started it, but same issue with blades not engaging. HELP!