Briggs no longer makes the p. g. ultra motor with the p.t.o. shaft . P. G. wants 1600.00 for a Honda conversion so We made our own for a lot less . We paid 200.00 for a new 6.75 Briggs ,its for a self propelled push mower . Then we paid 85.00 for a new clutch for a 7/8 shaft . Then arround 100.00 for all the other hardware . We also made a rope pull where your hands don't get skinned . As you can see the bracket had to be bent in for the motor to bolt right on . If you attempt one of these a 3/4 shaft clutch is more common for about 45.00 . If you guys post a up close picture of your mechinacal spray pump on the magnum , then I can make a conversion for mechanical spray system also . I currently run an automotive battery for all day spraying and hook up a bat. charger at night .