Advance HCT400A Heavy Duty Marine Gearbox 7.42:1 Reduction

Description

Match coastal towing requirements with the Advance HCT400A Heavy Duty Marine Gearbox 7.42:1 Reduction. This two-stage marine gearbox is specified for heavy-duty towing and coastal workboats, with a 7.42:1 reduction ratio, maximum input power of 675 HP (504 kW) at 1,800 RPM, and a maximum input speed of 2,100 RPM.

Model HCT400A-742 uses a hydraulic two-stage reducer clutch configuration and provides a listed transmission capacity of 0.375 HP/RPM (0.28 kW/RPM). Its supplied drivetrain configuration includes SAE 0 and SAE 1 bell housing standards, 18,434 lbf (82,000 N) maximum propeller thrust, a 14.76-inch (375 mm) center distance, and a 7.9-gallon (30-liter) oil capacity.

Key Features of Advance HCT400A

• 7.42:1 reduction ratio identifies the listed two-stage speed-reduction configuration for towing-propulsion matching.
• 675 HP (504 kW) maximum input power at 1,800 RPM defines the stated engine-input rating.
• 2,100 RPM maximum input speed identifies the stated operating-speed limit.
• 0.375 HP/RPM (0.28 kW/RPM) transmission capacity provides the listed capacity specification.
• Hydraulic two-stage reducer clutch configuration identifies the supplied transmission arrangement.
• SAE 0 and SAE 1 bell housing standards define the listed engine-interface options.
• 18,434 lbf (82,000 N) maximum propeller thrust provides the stated thrust rating.
• 14.76-inch (375 mm) center distance supports verification of drivetrain geometry.
• 7.9-gallon (30-liter) oil capacity identifies the stated lubricant fill quantity.
• 30.9 x 39.1 x 44.5 inch dimensions and 3,197 lb dry weight support installation-space and handling planning.

Fitment and Propulsion Use

The Advance HCT400A-742 is specified for heavy-duty towing and coastal workboats. It supports propulsion systems requiring a 7.42:1 reduction ratio, subject to matching the engine’s rated torque, operating RPM, SAE 0 or SAE 1 bell housing interface, propeller-thrust requirement, and complete shaft arrangement. 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 the SAE 0 or SAE 1 bell housing interface and confirm that the vessel structure, engine alignment, and propeller-shaft geometry accommodate the 14.76-inch center distance, 30.9 x 39.1 x 44.5 inch housing, and 3,197 lb dry weight. The supplied data lists a 7.9-gallon oil capacity. Follow the engine and gearbox manufacturer’s installation manuals and product instructions for alignment, lubrication, controls, cooling connections, and service procedures.

Before Ordering the Advance HCT400A

Verify that Advance model HCT400A-742 is correct for your heavy-duty towing or coastal-workboat propulsion system. Confirm the 7.42:1 reduction ratio, 0.375 HP/RPM (0.28 kW/RPM) transmission capacity, 675 HP (504 kW) maximum input power at 1,800 RPM, 2,100 RPM maximum input speed, hydraulic two-stage reducer clutch configuration, SAE 0/SAE 1 bell housing options, 18,434 lbf (82,000 N) maximum propeller thrust, 14.76-inch center distance, 7.9-gallon oil capacity, 30.9 x 39.1 x 44.5 inch dimensions, 3,197 lb dry weight, CCS/ZC approval, and 1-year limited warranty. Confirm compatibility with your engine manufacturer’s documentation before purchase.