Advance HC138 Heavy Duty Marine Gearbox 2.52:1 Reduction
Engineered for vessel repower projects, the 380 kg Advance HC138-252 inboard boat transmission gearbox steps down 460 HP at 2500 RPM with a 2.52:1 ratio to match commercial propeller shafts.
- 2.52:1 ratio matches high torque hulls.
- 460 HP rating supports commercial engines.
- Multi-disc clutch locks smoothly underway.
- Output shaft absorbs 35000 N thrust.
- Cast housing weighs exactly 380 kg.
$3,868.89
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Match a high-torque hull with the Advance HC138 Heavy Duty Marine Gearbox 2.52:1 Reduction. This heavy-duty marine transmission is specified for marine repower and high-torque hulls, with a 2.52:1 reduction ratio, maximum input power of 460 HP (345 kW) at 2,500 RPM, and a maximum input speed of 2,500 RPM.
Model HC138-252 pairs a hydraulic multi-disc clutch with a listed transmission capacity of 0.18 HP/RPM (0.138 kW/RPM). the listed product data identifies SAE 1 and SAE 2 bell housing standards, 7,868 lbf (35,000 N) maximum propeller thrust, an 8.86-inch (225 mm) center distance, and a 3.17-gallon (12-liter) oil capacity.
Fitment and Propulsion Use
The Advance HC138-252 is specified for marine repower and high-torque hulls. It supports a propulsion layout requiring a 2.52:1 reduction ratio, within the listed 460 HP maximum input rating at 2,500 RPM and 2,500 RPM maximum input speed. Confirm fitment using the engine model, serial number, rated torque, operating RPM, reduction ratio, and manufacturer drivetrain documentation before ordering.
Before Ordering the Advance HC138
Verify that Advance model HC138-252 matches your marine repower or high-torque-hull propulsion system. Confirm the 2.52:1 reduction ratio, 0.18 HP/RPM (0.138 kW/RPM) transmission capacity, 460 HP (345 kW) maximum input power at 2,500 RPM, 2,500 RPM maximum input speed, hydraulic multi-disc clutch, SAE 1/SAE 2 bell housing options, 7,868 lbf (35,000 N) maximum propeller thrust, 8.86-inch center distance, 3.17-gallon oil capacity, 25.5 x 24.0 x 31.0 inch dimensions, 837 lb dry weight, CCS/ZC approval, and 1-year limited warranty. Confirm compatibility with your engine manufacturer’s documentation before purchase.
Product Specifications
| Key Features of Advance HC138 | |
|---|---|
| 2.52 | 1 reduction ratio provides the listed speed-reduction configuration for drivetrain matching. |
| Power / Output | 460 HP (345 kW) maximum input power at 2,500 RPM identifies the listed engine-input rating. |
| Feature | 2,500 RPM maximum input speed defines the listed operating-speed limit. |
| Power / Output | 0.18 HP/RPM (0.138 kW/RPM) transmission capacity provides the listed capacity specification. |
| Feature | Hydraulic multi-disc clutch identifies the listed clutch arrangement. |
| Engine / Motor | SAE 1 and SAE 2 bell housing standards identify the listed engine-interface options. |
| Capacity | 7,868 lbf (35,000 N) maximum propeller thrust defines the listed thrust capacity. |
| Dimensions / Size | 8.86-inch (225 mm) center distance identifies the listed drivetrain geometry measurement. |
| Capacity | 3.17-gallon (12-liter) oil capacity provides the listed service-fill quantity. |
| Dimensions / Size | 25.5 x 24.0 x 31.0 inch dimensions and 837 lb dry weight support installation-space planning. |
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