Balmar 170A 12V Dual Foot K6 Serpentine Alternator

Balmar builds alternator power upgrades specifically for marine applications rather than adapting automotive parts to a boat. High reliability bearings, robust rectifier diodes, and improved heat-sinking go into every unit, which matters on a boat where the alternator runs longer and hotter than a car's ever does.

This model puts out 170 amps at 12 volts through a 4-inch dual foot saddle mount with a K6 serpentine pulley, the same output as the 3.15-inch dual foot version but sized for engines using the larger mounting footprint.

It's built without isolated grounding, so it's worth confirming whether the boat's existing electrical setup calls for isolated ground before ordering this version over one that includes it. Shop more marine alternators.

• 170A output at 12V
• 4" dual foot saddle mount, K6 pulley
• High reliability bearings and improved heat-sinking
• Not isolated ground, confirm system requirements first