Advance MB270A Heavy Duty Marine Gearbox 6.39:1 Reduction

Configure a deep-reduction coastal drivetrain with the Advance MB270A Heavy Duty Marine Gearbox 6.39:1 Reduction. This marine gearbox is specified for coastal freighters and passenger ferries, with a 6.39:1 reduction ratio, maximum input power of 264 HP (197 kW) at 1,800 RPM, and a maximum input speed of 2,500 RPM.

Model MB270A-639 uses a hydraulic multi-disc clutch and provides a listed transmission capacity of 0.147 HP/RPM (0.108 kW/RPM). Its supplied drivetrain data includes 8,812 lbf (39,200 N) maximum propeller thrust, a 10.63-inch (270 mm) center distance, a 4.75-gallon (18-liter) oil capacity, and a dry weight of 1,488 lb (675 kg).

Fitment and Propulsion Use

The Advance MB270A-639 is specified for coastal freighters and passenger ferries. It supports propulsion systems requiring a 6.39:1 reduction ratio, within the listed 264 HP maximum input rating at 1,800 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 MB270A

Verify that Advance model MB270A-639 matches your coastal freighter or passenger-ferry propulsion system. Confirm the 6.39:1 reduction ratio, 0.147 HP/RPM (0.108 kW/RPM) transmission capacity, 264 HP (197 kW) maximum input power at 1,800 RPM, 2,500 RPM maximum input speed, hydraulic multi-disc clutch, 8,812 lbf (39,200 N) maximum propeller thrust, 10.63-inch center distance, 4.75-gallon oil capacity, 1,488 lb dry weight, and stated coastal-freighter and passenger-ferry application. Confirm compatibility with your engine manufacturer’s documentation before purchase.