Advance D300A Heavy Duty Marine Gearbox 4.00:1 Reduction
Bolting straight to SAE 0 and 00 engine flanges, the 880 kg Advance D300A-400 hydraulic marine transmission gearbox steps down 737 HP at 2400 RPM with a 4.00:1 ratio.
- 4.00:1 ratio powers large harbor tugboats.
- Max input power reaches 737 HP.
- Hydraulic clutch cushions continuous heavy shifts.
- Large casing holds 20 liters fluid.
- Cast iron unit weighs 880 kg.
$6,257.04
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Match a tugboat drivetrain to the Advance D300A Heavy Duty Marine Gearbox 4.00:1 Reduction. This heavy-duty marine transmission is specified for tugboats and high-displacement hulls, with a 4.00:1 reduction ratio, maximum input power of 737 HP (550 kW) at 2,400 RPM, and a maximum input speed of 2,400 RPM.
Model D300A-400 uses a hydraulic power-shift clutch and provides a listed transmission capacity of 0.31 HP/RPM (0.23 kW/RPM). the listed data identifies SAE 0 and SAE 00 bell housing standards, 15,736 lbf (70,000 N) maximum propeller thrust, a 13.78-inch (350 mm) center distance, and a 5.28-gallon (20-liter) oil capacity.
Fitment and Propulsion Use
The Advance D300A-400 is specified for tugboats and high-displacement hulls. It supports drivetrain designs requiring a 4.00:1 reduction ratio, within the listed 737 HP maximum input rating at 2,400 RPM and 2,400 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 D300A
Verify that Advance model D300A-400 matches your tugboat or high-displacement-hull propulsion system. Confirm the 4.00:1 reduction ratio, 0.31 HP/RPM (0.23 kW/RPM) transmission capacity, 737 HP (550 kW) maximum input power at 2,400 RPM, 2,400 RPM maximum input speed, hydraulic power-shift clutch, SAE 0/SAE 00 bell housing options, 15,736 lbf (70,000 N) maximum propeller thrust, 13.78-inch center distance, 5.28-gallon oil capacity, 36.0 x 32.5 x 45.0 inch dimensions, 1,940 lb dry weight, CCS/ZC (ABS grade) classification, and 1-year limited warranty. Confirm compatibility with your engine manufacturer’s documentation before purchase.
Product Specifications
Advance D300A Heavy Duty Marine Transmission - 4.00:1 Ratio
| Brand | Advance |
|---|---|
| Model / SKU | D300A-400 |
| Country of Origin | China |
| US Support / Warranty | 1-Year Limited Warranty |
| Reduction Ratio | 4.00:1 |
| Transmission Capacity | 0.31 HP / RPM (0.23 kW / RPM) |
| Max Input Power | 737 HP (550 kW) @ 2400 RPM |
| Max Input Speed | 2400 RPM |
| Bell Housing Standard | SAE 0 / SAE 00 |
| Clutch Type | Hydraulic Power Shift |
| Max Propeller Thrust | 15,736 LBF (70,000 N) |
| Center Distance | 13.78" (350 mm) |
| Oil Capacity | 5.28 Gallons (20 Liters) |
| Dry Weight | 1,940 lbs (880 kg) |
| Dimensions (LxWxH) | 36.0" x 32.5" x 45.0" |
| Classification / Certs | CCS / ZC (ABS Grade) |
| Primary Application | Tugboats & High-Displacement Hulls |
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