The only way to tell is to check it on the tractor. make sure that you can lift the mower with the drive shaft attatched, and that it doesn't bottom out the shaft into the gearbox or pto. Also.. keep in mind that you will hant an over running coupler hooked to the pto on your tractor to keep the inertia of the mower from pushing your non-live pto/single stage clutched tractor ahead. The pto will need overlap on the shafts.. so if it is so short that it comes apart when extended.. you need a new shaft. If it is long.. some of the shafts can be cut down.. just gotta see how much to cut down, then cut equal amounts off of both pieces. ( half off of each side ). Some shafts are easier to cut than others.. If it bothers you to cut the shaft.. I'm guessing a driveshaft shop will zip it for a few bucks.. Given that a 5' rotary cutter is category 1, and that whatever tractor it was on had to be int he 25ish HP range to pull it.. You may find yourself lucky and that the shaft is in the correect length range. good luck.. report back if you have questions.. Soundguy
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