Insulated return Yes, Terminal W, Voltage 14, Amp 90, Radius 3 82.00, Regulator type IR, Belt Adjustment Bracket Hole 1 5/16", Radius 84.00, Prod. info BN, Pulley w/o, W plug type 10-24 UNC, Radius 4 82.00, Servicing Mercury, Radius 2 82.00, B+ M6, Rotation CW/CCW, Bracket Hole Size 1 13.00, Holder Arm Width 27.20, Belt Adjustment Bracket Hole Position 55;60;5, Total Length 180.00, Position 60, B+ Position 36, Remarks w/ adjustable regulator. Rotor shaft: 5/8".