**Verify the part fits before purchasing**

Specs:

Unit Type: Alternator
Voltage: 12
Rotation: CW
Dimension: Replacement 10SI Unit:, Mtg. Ear Top Holes: (3) x 5/16-18 Threaded, Mtg. Ear Bottom Hole: 12.9mm Unthreaded, Mtg. Ear Top Thick: 11.2mm, Mtg. Ear Bottom Thick: 26.2mm, B+ Terminal: 12-24, Note: 1-Wire,
Amperage: 63
Clock: 12
Pulley Class: V1
Regulator: IR
Fan Type: EF
Brief: Marine Applications
1-V Pulley 66.7mm OD
Use Spacer 550352 IF Additional One Inch Foot IS Required
This is a 10SI Style Alternator Used to Replace the Motorola Units With a 1 Inch Bottom Mounting Foot and a 1-Wire Hook-up in Marine Applications.: See Also ADR0397 (Higher Amp): See Also ADR0398 (2-Wire Hook-up)

Replaces OEM Numbers:

API MARINE: 20091
ARCO MARINE: 20500
ARROWHEAD: ADR0396
EMP PARTS: 4-1064XMP
J & N: 400-20004
LESTER: 8904
WAI: 8904N