Advance HCD400A Heavy Duty Marine Gearbox 4.47:1 Reduction

Configure a heavy-workboat repower with the Advance HCD400A Heavy Duty Marine Gearbox 4.47:1 Reduction. This deep-case marine gearbox is specified for marine repower and heavy workboats, with a 4.47:1 reduction ratio, maximum input power of 810 HP (604 kW) at 1,800 RPM, and a maximum input speed of 1,800 RPM.

Model HCD400A-447 uses a hydraulic multi-disc clutch and provides a listed transmission capacity of 0.45 HP/RPM (0.331 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 13.98-inch (355 mm) center distance, and a 7.4-gallon (28-liter) oil capacity.

Fitment and Propulsion Use

The Advance HCD400A-447 is specified for marine repower and heavy workboats. It supports propulsion systems requiring a 4.47:1 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 HCD400A

Verify that Advance model HCD400A-447 is correct for your marine repower or heavy-workboat propulsion system. Confirm the 4.47:1 reduction ratio, 0.45 HP/RPM (0.331 kW/RPM) transmission capacity, 810 HP (604 kW) maximum input power at 1,800 RPM, 1,800 RPM maximum input speed, hydraulic multi-disc clutch, SAE 0/SAE 1 bell housing options, 18,434 lbf (82,000 N) maximum propeller thrust, 13.98-inch center distance, 7.4-gallon oil capacity, 33.2 x 39.8 x 42.0 inch dimensions, 2,425 lb dry weight, CCS/ZC approval, and 1-year limited warranty. Confirm compatibility with your engine manufacturer’s documentation before purchase.