Engine

Specs

• Yanmar 4JH2E, 50 hp inboard, freshwater-cooled diesel
• Repowered 1998 (current engine)
• Crank pulley: stock single-groove (confirmed correct for stock alternator setup)
• Alternator: stock Yanmar 55A Hitachi (reverting from Balmar 120A serpentine conversion)

Serpentine Conversion Notes

The previous owner installed a Balmar 120A with serpentine belt conversion. This has been removed. The crank pulley is the stock single-groove Yanmar part — not a multi-groove conversion pulley. The conversion kit (PK-4JH2-E or Balmar 48-YSP-4JH-E) slips a multi-groove pulley over the stock one using extra bolt holes. When removing the conversion, the multi-groove pulley must come off and the stock single-groove one left in place.

Oil

• Capacity (with filter): 4.8 L (5.1 qt)
• Grade: Chevron Delo 400 XLE 15W-40 CK-4 (or any 15W-40 CD or higher)