Advance HCT400A Heavy Duty Marine Gearbox 7.42:1 Reduction

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.

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.

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.