Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley w/Isolated Ground [621-120-J10] Engine Parts & Service | Alternators Box Dimensions: 1"H x 1"W

Box Dimensions: 1"H x 1"W x 8"L WT: 0

Engine Isolation (EI)—can be configured for isolation of two engines while both are running to protect engine electronics and maximize alternator output

Even better

UPC: 873804001937

Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley w/Isolated Ground [621-120-J10] Engine Parts & Service | Alternators Box Dimensions: 1"H x 1"WAlternator 120 AMP 12V 1 2" Single Foot Spindle Mount J10 Pulley with Isolated Ground Alternator, 621 Series, 120A, 12V, Spindle Mount (Single Foot), 1 2in, J10 AltMount Serpentine Pulley, Isolated Ground 1" Motorola Style Mounting. Typical for Westerbeke, Lehman, Hino & Pathfinder Engines 2" Delco Style Mounting; Typical for Volvo Penta (Gas & Diesel), John Deere, Perkins, Mercruiser, Pleasurecraft, Crusader, Indmar, Marine Power & other GM based