Reliable High-Output Charging for Marine Engines with 3.15" Saddle Mounting

Delivering dependable charging performance for demanding marine electrical systems, this 12V high-output alternator is engineered for vessels requiring increased charging capacity and compatibility with externally regulated charging systems. Featuring a 3.15" DF315 saddle mount, isolated ground configuration, side-mounted battery post and 49mm K6 serpentine pulley, it is suited to many small-case marine engine applications, including numerous Yanmar installations. The externally regulated design allows precise charging control, making it well suited to lithium battery systems when paired with a compatible external regulator.

Key Features

• High Charging Output – Produces up to 225A nominal output with a maximum cold output of 254A, supporting high electrical loads and rapid battery charging.
• Externally Regulated Operation – Designed exclusively for use with an external voltage regulator, allowing accurate charging management for advanced battery systems.
• Isolated Ground Configuration – Isolated ground design supports installations where electrical isolation is required to reduce grounding issues and improve system compatibility.
• 3.15" DF315 Saddle Mount – Fits many small-case alternator applications using the 3.15" saddle mounting pattern commonly found on Hitachi, Lucas, Mitsubishi and many Yanmar engines.
• 49mm K6 Serpentine Pulley – Supplied with a 6-groove 49mm pulley for serpentine belt systems, helping deliver efficient power transfer at high operating speeds.
• Side-Mounted M8 Battery Post – Side battery terminal provides convenient cable routing and secure high-current electrical connections.
• Durable Protective Finish – Black E-coating helps protect the alternator from corrosion and harsh marine environments while assisting with heat management.
• Engineered for Continuous Operation – Rated for sustained charging performance with strong hot-output capability during extended engine operation.
• SAE J1171 Certified – Certified for ignition protection, making it suitable for marine engine compartment installations where applicable.

Built for demanding onboard electrical systems, this alternator combines robust charging performance with reliable compatibility for externally regulated marine charging installations. It is well suited to vessels requiring consistent output for house batteries, electronics and auxiliary equipment.