Re: 1956 15HP throttle arm pieces
The gears come match-drilled on their shafts, so you replace both the gear and shaft as a unit. There are two types of the gears, stamped and cast. You can use either (cast are better), but cannot mix them. The 5.5 thru 18 all use the same one in the tiller handle, but the one in the steering bracket varies in length.