Hi guys, Not sure if you can help. I'm looking for an owners manual or similar for my MTD ride-on mower, but I can't seem to find my model anywhere on the internet. Perhaps you could help me out. Here are the details: MTD J/136 Ride-on mower Model No: 13AY458C611 Seriel No: AA149L10234 I don't know the year, but I think the engine size is 13hp or 13.5hp. Any help at all would be very much appreciated. Thanks.