Chris, No, all PTOs are not the same. There are two different sizes of shafts on the A-C line, I believe the sizes are 1-3/8" diameter shaft and 1-5/8" daimeter shaft or something like that. If you want to use a modern implement with the older, smaller diameter, there are adapters available to sleeve the smaller shaft to the larger diameter. Most A-Cs built after 1940 or so have the larger, now standard, diameter. Depending on which model tractor you have, there are basically four types of mowers available: 1)The pull behind rotary type, also known as trailer or drag type. 2)The 3-point rotary type which requires the tractor to have a 3-point hitch. 3) The center or "belly" rotary type, similar to most riding mowers. 4) And finally, the sicle mower, which looks much like a huge 5 to 8 foot hedge trimmer and comes in all of the same mounting forms as the rotary types. Then there are pull behind type rotary mowers with their own engines and other specialized types.First, what tractor model do you have? How much ground do you need to mow? What is the terrain like and how easily can you cover it? How many and what kinds of obstructions are there? All of these factors need consideration before you can decide what type of mowing machine to buy. Then, there's the used vs. new question. Used can save a lot of money, but what if it breaks? Can you do simple, basic repairs yourself? Finally, brand names. Woods is one you can't go wrong with. Others with good reputations are Continental Belton, Rhino and I'm sure others that you will be able to recognize after you have checked out these three. Compare others to what you see at a Woods or Rhino dealer. Continental Belton is out of the business now, but there may be used units available to you. Once you see quality, you will quickly be able to see the difference between a good mower and a "cheapie". I suggest you peruse the Yellow Pages or the internet for a Woods dealer near you and pay him a visit. He should be able to help you with your decision as to the type mower you need. Be forewarned, Woods equipment is EXPENSIVE. It will, however, last you a lifetime. Let us know more so we can help, Phil
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