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Advance HCT400A Heavy Duty Marine Gearbox 7.42:1 Reduction
Advance HCT400A-742 Heavy Duty Marine Gearbox HCT400A-742 serves as a heavy-duty 7.42:1 reduction ratio as a marine propulsion transmission system for Heavy Duty Towing & Coastal Workboats field integration.
- Transaxle Reduction Ratio: Absolute 7.42:1 Reduction Ratio.
- Engine Power Capability: 675HP (504kW) Power Capacity @ 1800 RPM.
- Classification Society: CCS / ZC Approved.
- Engagement Mechanism: Hydraulic (Two-Stage Reducer) Technology.
- Housing Interface: SAE 0 / SAE 1 Standard Position.
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Description
Advance HCT400A 7.42:1 Gearbox
Optimizing power delivery for extreme maritime applications, the Advance HCT400A is the definitive mechanical solution for mariners requiring a reliable physical bridge to propulsion efficiency. As a premier Advance marine gearbox, this unit utilizes optimized gear geometry to deliver superior hydrodynamic performance for massive displacement hulls. The hardware architecture focuses on torque management, ensuring this Advance power system provides a stable 7.42:1 reduction for balanced speed and towing power in professional environments.
Technology-driven mechanical performance provides total protection through an integrated pressure regulation system that maintains optimal oil flow to all internal components. This Advance marine transmission features a non-corrosive exterior finish to facilitate durability in damp bilge and engine room environments. Reliability is reinforced by the case-hardened gears and robust output flange designed for heavy-duty maritime service. This unit is the ideal choice for mariners prioritizing professional maritime power and consistent transmission performance.
Key Technical Specifications
- 7.42:1 dedicated reduction gear ratio.
- HCT400A series heavy duty construction.
- Mechanical hydraulic shifting control logic.
- High strength alloy internal gearing.
- Optimized for high torque loads.
- Compact footprint engine room installation.
- Industrial grade drivetrain bearing system.
Advance HCT400A Two-Stage Marine Gearbox - 7.42:1 Ratio
| Brand | Advance |
| Model / SKU | HCT400A-742 |
| Country of Origin | China |
| US Support / Warranty | 1-Year Limited Warranty |
| Reduction Ratio | 7.42:1 |
| Transmission Capacity | 0.375 HP / RPM (0.28 kW / RPM) |
| Max Input Power | 675 HP (504 kW) @ 1800 RPM |
| Max Input Speed | 2100 RPM |
| Bell Housing Standard | SAE 0 / SAE 1 |
| Clutch Type | Hydraulic (Two-Stage Reducer) |
| Max Propeller Thrust | 18,434 LBF (82,000 N) |
| Center Distance | 14.76" (375 mm) |
| Oil Capacity | 7.9 Gallons (30 Liters) |
| Dry Weight | 3,197 lbs (1,450 kg) |
| Dimensions (LxWxH) | 30.9" x 39.1" x 44.5" |
| Classification / Certs | CCS / ZC Approved |
| Primary Application | Heavy Duty Towing & Coastal Workboats |







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