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PRM 125 D2 2.04:1 Marine Gearbox

Bolting straight to compact diesel engines, the 12.5 kg PRM PRM125-D2 inboard boat transmission gearbox steps down 70 HP at 5000 RPM with an efficient 2.04:1 parallel reduction ratio.

  • 2.04:1 ratio drives mid sized yachts.
  • Offset parallel layout saves engine room.
  • Cone clutch operates without hydraulic maintenance.
  • Lubrication reservoir takes 0.40 liters fluid.
  • Lightweight chassis weighs exactly 12.5 kg.
$519.30
Availability In stock and available to order
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Category: Brand: SKU: PRM-125-D2-204
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Match a 2.04:1 ratio with the PRM 125 D2 2.04:1 Marine Gearbox. This marine gearbox is specified for mid-sized yachts and small fishing boats, with a parallel output configuration with offset and a maximum pleasure-use input rating of 70 HP (52 kW) at 5,000 RPM.

Model PRM125-D2 uses a mechanical cone clutch and provides a separate maximum continuous-duty input rating of 23 HP (17 kW) at 3,000 RPM. The listed service requirements are ATF Dexron II or III and a 0.40-liter oil capacity, while the stated dry weight is 27.5 lb (12.5 kg).

Fitment and Propulsion Use

The PRM 125 D2 is specified for mid-sized yachts and small fishing boats. It supports propulsion systems requiring a 2.04:1 reduction ratio and a parallel offset output configuration. The pleasure-use and continuous-duty ratings are listed at different engine speeds, so verify the actual engine output, vessel-duty profile, transmission interface, and shaft geometry before ordering. Confirm fitment using the engine model, serial number, rated torque, operating RPM, reduction ratio, and manufacturer drivetrain documentation before ordering.

Before Ordering the PRM 125 D2

Verify that PRM Marine model PRM125-D2 is suitable for your mid-sized yacht or small fishing-boat propulsion system. Confirm the 2.04:1 reduction ratio, parallel offset output configuration, 70 HP (52 kW) maximum pleasure rating at 5,000 RPM, 23 HP (17 kW) maximum continuous rating at 3,000 RPM, mechanical cone clutch, ATF Dexron II or III oil requirement, 0.40-liter oil capacity, and 27.5 lb (12.5 kg) dry weight. Confirm compatibility with your engine manufacturer’s documentation before purchase.

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