For Unit With 6 Volt Use 90-01-4443 (30 Amp), For Unit With 24 Volt, 3 Wire Hookup Use 90-01-3123 (40 Amp), For Units With Tachometer Hookup Use 90-01-3081 (72 Amp), 90-01-3081A (100 Amp), For Unit With 1 Wire Hookup Use 90-01-3125 (61 Amp), For Unit With 1 Wire Hookup, With Self Exciting Regulator Use 90-01-3081S (72 Amp), For Unit With 3 Pin Regulator Hookup Use 90-01-3135 (61 Amp), For Units With Debris Shield Use 90-01-3131 (72 Amp), 90-01-3131A (100 Amp), For Marine Unit Use 90-01-4413 (63 Amp), For Unit With 24 Volt Use 90-01-3122 (40 Amp), For Unit With 24 Volt, 1 Wire Hookup Use 90-01-3102 (40 Amp), For Niehoff Use 90-07-1052 (80 Amp), For Enclosed Unit Use 90-01-3078 (18 Amp), For Marine Unit Use 90-01-3103 (42 Amp), For Unit With Debris Shield, Fan And Pulley Use 90-01-4437, THIS 63A ALTERNATOR IS USED TO REPLACE ALL LOWER AMP UNITS. THE 90-01-3106 IS CLOCKED AT 3:00, WHILE THE 90-01-4687 IS CLOCKED AT 6:00, THE 90-01-4591 AT 9:00 AND THE 90-01-3141 IS AT 12:00
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