Phasor YK4-45.0 45kW Keel Cooled Diesel Generator

The Phasor YK4-45.0 is a heavy-duty keel-cooled marine diesel generator for commercial and large-vessel installations requiring 45 kW of 120/240V single-phase 60Hz AC power. It uses a Yanmar 4TN100 four-cylinder diesel engine operating at 1,800 RPM with a direct-coupled brushless generator and solid-state voltage regulation. The open-frame generator is designed for vessels with a correctly engineered keel-cooling, grid-cooling, or skin-cooling circuit.

The generator uses an engine-driven circulation pump for its closed coolant circuit and requires external hull cooling sized for the engine and generator heat load. It includes a deluxe remote gauge panel with engine monitoring and automatic shutdown for low oil pressure, high coolant temperature, and overspeed. An optional sound enclosure may be available separately, subject to the selected configuration.

Key Specifications

- Heavy-duty keel-cooled marine diesel generator for 120/240V single-phase 60Hz AC systems.
- Provides 45 kW continuous output at 1,800 RPM.
- Uses a Yanmar 4TN100 four-cylinder diesel engine with approximately 3,318 cc displacement.
- Provides 120/240V output with approximately 375A at 120V or 187.5A at 240V.
- Uses a direct-coupled brushless generator with solid-state voltage regulation.
- Requires a closed-loop keel-cooling, grid-cooling, or skin-cooling circuit.
- Fuel consumption is listed at approximately 3.4 US gallons per hour, or 12.8 L per hour, at full load.
- Open-frame generator measures approximately 1,422 mm by 660 mm by 787 mm and weighs approximately 658 kg.

Electrical Compatibility

This generator is intended for high-demand 120/240V single-phase 60Hz electrical systems. Confirm continuous demand, simultaneous loads, power factor, peak motor-starting surge, distribution design, and future load expansion before selecting a 45 kW generator. A three-phase option, if required, must be specified and verified against the exact alternator configuration.

High-capacity systems should include a formal load calculation for air conditioning, watermakers, battery chargers, refrigeration, pumps, galley equipment, workshop equipment, and all other connected loads. Do not assume the nominal 45 kW output supports every onboard load operating simultaneously.

Installation Considerations

Install the generator on a rigid vibration-isolated foundation designed for approximately 658 kg, with service clearance for oil, filters, coolant, electrical terminals, exhaust, and optional sound enclosure. Connect the closed cooling loop to a keel cooler, grid cooler, or skin cooler engineered for the total heat-rejection requirement. Provide diesel fuel supply and return, exhaust, ventilation, starting battery, AC distribution, grounding, circuit protection, and shore-power transfer isolation. Installation and commissioning should be completed by a qualified marine generator technician.

Before Ordering

Confirm required continuous and surge load within 45 kW, 120/240V single-phase 60Hz compatibility, exact phase requirement, engineered keel-, grid-, or skin-cooling capacity, available installation space, structural support for approximately 658 kg, required sound-enclosure configuration, diesel fuel layout, exhaust route, ventilation, starting-battery circuit, AC distribution and transfer-switch design, grounding plan, service access, and qualified installation requirements before purchase.