Reliable Low-Speed Charging for Yanmar Common Rail Marine Engines

Delivering up to 4kW of charging power, this 24V Low Turn-On (LTO) high-output alternator is engineered specifically for Yanmar Common Rail marine engines using the 3.15" saddle mounting configuration. The Low Turn-On design begins charging at significantly lower engine speeds than conventional alternators, helping maintain battery charge while idling or operating at low RPM. Featuring a native 24V field system, isolated ground configuration and external regulation, it provides efficient charging performance for large battery banks and advanced battery management systems.

Key Features

• Low Turn-On (LTO) Technology – Produces charging output from much lower alternator speeds, delivering improved battery charging during idle and low-speed engine operation.
• Up to 4kW Charging Output – Delivers up to 144A at 27.5V, providing high-capacity charging for demanding onboard electrical systems.
• 3.15" Common Rail Housing – Specifically configured for Yanmar Common Rail engines using the 3.15" saddle mounting arrangement.
• Native 24V Field System – Uses a dedicated 24V rotor and field circuit to improve charging efficiency while reducing operating temperatures.
• External Regulation Only – Compatible with external voltage regulators for precise battery charging and advanced lithium battery management.
• Isolated Ground Configuration – Supports installations requiring isolated electrical grounding for improved system compatibility.
• 49mm K6 Serpentine Pulley – Supplied with a 6-groove serpentine pulley for efficient belt drive and dependable power transfer.
• Optimised Cooling Design – Heat-dissipating coatings, dual cooling fans and an externally mounted rectifier assist in maintaining lower operating temperatures during continuous operation.
• SAE J1171 Ignition Protected – Certified for installation in marine engine compartments requiring ignition-protected equipment.

Built for continuous-duty marine applications, this alternator combines exceptional low-speed charging performance with reliable high-output operation for vessels equipped with large battery banks and advanced electrical systems.