Phasor KK4-12.5 – 12.5kW Keel Cooled Diesel Generator 60Hz

The Phasor KK4-12.5 is a 12.5 kW, 60Hz marine diesel generator designed for vessels using 120V or 240V single-phase AC power. It uses a Kubota V1505-E four-cylinder diesel engine operating at 1,800 RPM and is configured for keel cooling, grid cooling, or compatible skin-cooling systems. The open-frame design is intended for installations where cooling is handled through the vessel hull circuit rather than by a seawater heat-exchanger arrangement.

The generator is supplied as an open-frame unit, with an optional sound enclosure available. It includes a remote safety-shutdown panel with oil-pressure, water-temperature, voltmeter, and hour-meter gauges. Correct installation requires a properly sized keel-cooling circuit, fuel system, exhaust, ventilation, starting battery, AC distribution, transfer switch, grounding, and circuit protection.

Key Specifications

- Keel-cooled marine diesel generator for 120V or 240V single-phase 60Hz AC systems.
- Provides 12.5 kW continuous output at 1,800 RPM.
- Uses a Kubota V1505-E four-cylinder diesel engine with 1,498 cc displacement.
- Uses a closed-loop keel-cooling, grid-cooling, or compatible skin-cooling arrangement.
- Features an engine-driven heavy-duty circulation pump for the coolant circuit.
- Fuel consumption is listed at approximately 1.1 US gallons per hour, or 4.16 L per hour, at full load.
- Supplied in an open-frame configuration; an optional sound enclosure may be available.
- Measures approximately 965 mm by 533 mm by 610 mm and has a listed dry weight of approximately 265 kg.

System Integration

This generator requires a keel-cooling or compatible hull-cooling circuit sized for the engine and generator heat load. It does not use a conventional raw-water heat exchanger as its primary cooling method. Confirm the vessel has an existing compatible keel cooler, grid cooler, or engineered skin-cooling solution before selecting this model.

The AC system requires a start battery, diesel fuel feed and return, exhaust system, ventilation, single-phase breaker panel, shore-power transfer switch or interlock, grounding and bonding, and correctly rated cables. Confirm the vessel’s 120V or 240V 60Hz requirement and include simultaneous loads, power factor, and motor-starting surge in capacity planning.

Installation Considerations

Mount the generator on a rigid vibration-isolated foundation designed for approximately 265 kg. Install correctly sized coolant plumbing to the keel-cooling circuit and verify coolant flow, expansion capacity, and air bleeding. Provide access for oil, filters, belts, coolant service, exhaust, electrical terminals, and control-panel wiring. Test voltage, frequency, cooling performance, shutdown functions, alarms, grounding, and load response during commissioning.

Before Ordering

Confirm required continuous and surge load within 12.5 kW, 120V or 240V single-phase 60Hz compatibility, an engineered keel-, grid-, or skin-cooling circuit, available 965 mm by 533 mm by 610 mm installation space, structural support for approximately 265 kg, diesel fuel layout, exhaust route, ventilation capacity, starting-battery circuit, AC distribution and transfer-switch design, grounding plan, optional sound-enclosure requirement, service access, and qualified marine-generator installation requirements before purchase.