PRM 125 D3 3.06:1 Marine Gearbox

Description

Match a 3.06:1 reduction requirement with the PRM 125 D3 3.06:1 Marine Gearbox. This marine gearbox is specified for workboats and displacement cruisers, with a parallel offset output configuration and a maximum pleasure-use input rating of 70 HP (52 kW) at 5,000 RPM.

Model PRM125-D3 uses a mechanical cone clutch and has a separate maximum continuous-duty input rating of 23 HP (17 kW) at 3,000 RPM. Service data specifies ATF Dexron II or III, a 0.40-liter oil capacity, and a dry weight of 27.5 lb (12.5 kg).

Key Features of PRM 125 D3

• 3.06:1 reduction ratio identifies the listed speed-reduction configuration for drivetrain matching.
• Parallel output with offset defines the supplied output-shaft arrangement.
• 70 HP (52 kW) maximum pleasure-use input rating at 5,000 RPM provides the stated pleasure-duty limit.
• 23 HP (17 kW) maximum continuous input rating at 3,000 RPM identifies the listed continuous-duty limit.
• Mechanical cone clutch identifies the specified clutch design.
• ATF Dexron II or III is the listed service oil type.
• 0.40-liter oil capacity provides the stated lubricant fill quantity.
• 27.5 lb (12.5 kg) dry weight supports installation and handling planning.
• Specified application for workboats and displacement cruisers helps identify the intended vessel category.

Fitment and Propulsion Use

The PRM 125 D3 is specified for workboats and displacement cruisers. It supports propulsion systems requiring a 3.06:1 reduction ratio and a parallel offset output configuration. The listed pleasure-use and continuous-duty input ratings apply at different engine speeds, so verify the actual engine output, transmission interface, shaft geometry, and vessel-duty profile before ordering. Confirm fitment using the engine model, serial number, rated torque, operating RPM, reduction ratio, and manufacturer drivetrain documentation before ordering.

Installation and Service Considerations

Verify that the parallel offset output configuration, 3.06:1 reduction ratio, engine power rating, and available installation geometry match the vessel drivetrain. Use only the listed ATF Dexron II or III oil and 0.40-liter oil capacity as directed by the manufacturer’s documentation. Follow the engine and gearbox manufacturer’s installation manuals and product instructions for alignment, lubrication, controls, cooling connections, and service procedures.

Before Ordering the PRM 125 D3

Verify that PRM Marine model PRM125-D3 matches your workboat or displacement-cruiser propulsion system. Confirm the 3.06:1 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.