Balmar Yanmar 3JH2 Ten-Groove Serpentine Pulley Kit

Balmar's AltMount serpentine pulley conversion kit is intended for Yanmar 3JH2-TE and 3JH2-E diesel engines. It replaces the relevant drive arrangement with a ten-groove J10 serpentine system. This is a fit-specific hardware kit, not a complete alternator. This conversion addresses the drive pulleys rather than changing the engine itself.

The supplied components include three J10 pulleys, two 45-inch-circumference belts, and mounting hardware. One of the belts is provided as a spare. Matching pulleys and belt geometry matter for proper belt tracking and alternator drive operation.

Balmar notes that installations using an AT-200A alternator may need a longer belt. Check the actual engine and alternator configuration rather than assuming the included belt works for every conversion. The kit is intended for the two identified Yanmar engine models. Browse more alternator mounts and pulleys.

• J10 ten-groove serpentine conversion kit
• For Yanmar 3JH2-TE and 3JH2-E engines
• Three pulleys, two 45 in belts, and mounting hardware
• AT-200A alternator may require longer belt