Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley w/Isolated Ground [621-120-J10] Boat Outfitting | Trim Tab Accessories Heat exchanger connections are 3/4"

Heat exchanger connections are 3/4" female NPT

Raymarine recommends using no more than two (2) extension cables in any given cable run

‘Output ON’ and “Charging” LED indicators

Cast hex for easier installation

the Joystick Control Unit

Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley w/Isolated Ground [621-120-J10] Boat Outfitting | Trim Tab Accessories Heat exchanger connections are 3/4"Alternator 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