Balmar Alternator 250 AMP 12V 3.15" Dual Foot Saddle J10 Pulley

The Balmar Alternator 250 AMP 12V 3.15" Dual Foot Saddle J10 Pulley is a high-output marine and industrial charging system designed for heavy-duty power generation on engine installations where sustained electrical demand exceeds standard OEM output. This XT Series alternator delivers 250 amps at rated output, meeting the power requirements of vessels and equipment running auxiliary systems, compressors, or extended DC loads without battery depletion.

The 250-amp capacity at 12 volts provides significant charging reserve for applications where standard 120–150 amp alternators fall short. The dual foot saddle mount accommodates Hitachi-style mounting architecture, making it a direct-fit replacement on Yanmar, Westerbeke, Lehman, and Perkins-Sabre diesel engines—the standard powerplants in commercial fishing vessels, trawlers, and industrial marine platforms. The 3.15-inch J10 AltMount serpentine pulley is engineered for low-slip belt engagement, critical for maintaining voltage regulation under variable engine RPM. Case ground design simplifies wiring harness integration on existing systems.

This unit replaces earlier Balmar models AT-DF-200-12-IG and AT-DF-200-J10, representing the newer generation of XT Series architecture with improved thermal management and bearing durability for continuous-duty operation. Buyers should verify existing engine mounting points and belt routing before installation. Note: This product cannot be returned to point of purchase; warranty support and technical issues require direct manufacturer contact.