
PRM 125 D2.5 2.5:1 Marine Gearbox
Managing mid-sized fishing boat propulsion lines, the 12.5 kg PRM PRM125-D2.5 marine reduction gear transmission converts 70 HP input at 5000 RPM through a reliable 2.50:1 offset gear assembly.
- 2.50:1 ratio powers small tugboat propellers.
- Input speed peaks at 5000 RPM.
- Mechanical clutch provides dependable manual shifting.
- Continuous rating handles 23 HP diesels.
- Sturdy gear casing weighs 12.5 kg.
Configure a mid-sized fishing or tug drivetrain with the PRM 125 D2.5 2.5:1 Marine Gearbox. This marine gearbox is specified for mid-sized fishing boats and tugs, with a 2.50:1 reduction ratio and a parallel output configuration with offset.
Model PRM125-D2.5 uses a mechanical cone clutch and has a maximum pleasure-use input rating of 70 HP (52 kW) at 5,000 RPM. Its separate continuous-duty input rating is 23 HP (17 kW) at 3,000 RPM. The supplied service data lists ATF Dexron II or III, a 0.40-liter oil capacity, and a dry weight of 27.5 lb (12.5 kg).
Fitment and Propulsion Use
The PRM 125 D2.5 is specified for mid-sized fishing boats and tugs. It supports propulsion systems requiring a 2.50:1 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.
Before Ordering the PRM 125 D2.5
Verify that PRM Marine model PRM125-D2.5 matches your mid-sized fishing boat or tug propulsion system. Confirm the 2.50:1 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.
Product Specifications
PRM 125 D2.5 Marine Gearbox - 2.50:1 Ratio
| Brand | PRM Marine |
|---|---|
| Model / SKU | PRM125-D2.5 |
| Country of Origin | United Kingdom |
| Output Configuration | Parallel (Offset) |
| Reduction Ratio | 2.50:1 |
| Max Input Power (Pleasure) | 70 HP (52 kW) @ 5000 RPM |
| Max Input Power (Continuous) | 23 HP (17 kW) @ 3000 RPM |
| Clutch Type | Mechanical Cone Clutch |
| Oil Capacity | 0.40 Liters |
| Oil Type | ATF (Dexron II or III) |
| Dry Weight | 27.5 lbs (12.5 kg) |
| Primary Application | Mid-Sized Fishing Boats & Tugs |
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