not a good idea, as bob said while the briggs claims 18 hp, the torque, the amount of twisting force the engine can produce, is not nearly enough to keep the mower spinning once its under a load, the cub has a big, heavy flywheel on the back of the engine which the briggs does not, also the rpm on the briggs is way wrong, if the mower was made for something like a cub it is designed to turn around at engine rpm on that tractor, in the area of 14 to 1600 rpm, a cub's pto is direct engine rpm, and it also spins in the opisite direction of the bigger tractors pto's, if its designed to be powered by a larger tractor its made to have around 540 rpms going into it then the mower steps up the rpm to its blades by a pulley system, gearbox ect, if you manage to get the briggs hooked up to power it, it will probably not even have enough to spin the blades at low idle, if you throttle it up into its power band it will power it on say bare ground or concrete, but you'll be hitting around 3600 rpm on the input pulley of the mower, nearly 4 times what it was designed for, the blades will be turning so fast the mower may self destruct,
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Today's Featured Article - A Cautionary Tale - by Ian Minshull. In the early 1950s my father bought an Allis Chalmers B and I used it for all the row crop work with the mangolds and potatoes, rolling and the haymaking on our farm. The farm and the Allis were sold and I have spent a lifetime working on farms throughout the country. I promised myself that one day I would own an Allis. That time event
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