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Advance 300 Marine Gearbox

Oct 26, 2022 | 300 Series, 300 500-1000kW | 0 comments

Advance 300 Marine Gearbox

The speed input range of the Advance 300 marine gearbox is 750-2500 RPM, with engine input power from 262.5 kW to 539.7 kW. the center distance is 264 mm, the reduction ratio range is 1.87-5.44, the transmission capacity range is 0.125-0.257 kW/RPM, the rated propeller thrust is 50 KN, and the input shaft is in the train Opposite to the output shaft.

Advance 300 marine gearbox is composed of transmission shaft, output coupling, input coupling, oil pressure gauge, oil Filter, control system, oil pump and other important components. Advance 300 marine gearboxes provides three types of control system which are push-pull flexible shaft, electric control and pneumatic control for customers to choose. To meet the different requirement of coupling with different engine brand and models, Advance 300 marine gearboxes provide different SAE size coupling and housing including SAE 0 1, flywheel SAE 18 16 14 is available……

All of our Advance 300 series marine gearbox can provide CCS classification certificate, some of series can provide international classifications with extra costs which mainly including French BV, British LR, American ABS, Japanese NK , Norway DNV-GL, Russia RS, South Korea KR, Italy RINA and other classification societies.

After over 60 years accumulation, Advance growth into a world-recoginized marine gearbox brand, which has been exported to over 50 countries and regions. As official marine power pack packager of Advance, SeaMac is the sub-brand of EMAC that committed to providing reliable premium propulsion system and power system for all kinds of ships around the world, SeaMac is a sub-brand of EMAC group that focused on maritime application.

SeaMac’s ranges of products mainly inclduing marine main engine, marine gearbox, marine propellers, marine control lever system, marine auxiliary engine, marine generator set and emergency generator set.

For more details about Advance gearbox and SeaMac’s products and services, you are welcome to visit our homepage: or contact our sales team to get latest accurate information.

Advantages Of Advance 300 Marine Gearbox

  • Advanced design and sophisticated manufacturing to adapt to various harsh working conditions! High-strength parts, strong ability to work under heavy loads.

  • Cylinder block and cylinder head adopt integrated design. The occurrence of engine water leakage and oil leakage is prevented, and the parts are about 40% less than other similar engines. The failure rate is greatly reduced.

  • Using forged steel camshaft and crankshaft, high-strength cylinder block design, multiple parts cast on the cylinder block, high rigidity, high pressure resistance, good reliability, and longer service life.

  • The cylinder bore adopts a platform mesh honing design. The perfect geometric structure effectively prevents oil leakage, and the use of advanced technology such as new piston ring components and gasket crimping and molding reduces oil loss.

  • The five key systems of the electronically controlled engine are all developed by DCEC, and have been applied and verified in different fields around the world to ensure the excellent economy and reliability of the product.

  • By optimizing the control strategy and combining with the actual operating conditions of the equipment, the fuel economy can be further improved.

Technical Specifications

Gearbox Model:300
Input Speed:750-2500 RPM
Power:539.7 kW @ 2100 RPM
Center Distance:264 mm
Trans.Capacity:0.257-0.125 kW/RPM
Reduction Ratio:1.87-5.44
Rated Thrust:50 kN
Dimension:786 mm * 930 mm * 864 mm
Net Weight:740 kg
Lead Time:15-30 Working Days
Payment Terms:T/T ,L/C

Advance T300 Medium-Low Duty Marine Gearbox
Advance T300 Medium-Low Duty Marine Gearbox
Advance T300 Medium-Low Duty Marine Gearbox
Advance T300 Medium-Low Duty Marine Gearbox
Advance T300 Medium-Low Duty Marine Gearbox
Advance T300 Medium-Low Duty Marine Gearbox


Input Speed

Trans. Capacity




300750-2500 RPM0.257 kW/RPM539.7 kW @ 2100 RPM786 mm *930 mm * 864 mmMechanical/Electrical/Pneumatical
HC300700-2500 RPM0.257 kW/RPM539.7 kW @ 2100 RPM680 mm * 930 mm * 880 mmMechanical/Electrical/Pneumatical
J300750-2500 RPM0.28 kW/RPM588 kW @ 2100 RPM786 mm * 930 mm * 864 mmMechanical/Electrical/Pneumatical
D300A1000-2500 RPM0.257 kW/RPM539.7 kW @ 2100 RPM786 mm * 1010 mm * 1041 mmMechanical/Electrical/Pneumatical
T3001000-2300 RPM0.243 kW/RPM510.3 kW @ 2100 RPM772 mm * 980 mm  * 1106 mmMechanical/Electrical/Pneumatical
T300/11000-2300 RPM0.196 kW/RPM411.6 kW @ 2100 RPM772 mm * 980 mm * 1106 mmMechanical/Electrical/Pneumatical

Technical Specifications of Advance 300 Marine Gearbox

Model300Input Speed(r/min)750-2500Center Distance(mm)264
Reduction Ratio(i)1.87 2.04 2.54Trans.Capacity(kW/rpm)0.257Power(kW)539.7 kW @ 2100 RPM
30.243510.3 kW @ 2100 RPM
3.530.221464.1 kW @ 2100 RPM
4.10 4.47 4.610.184386.4 kW @ 2100 RPM
4.940.147308.7 kW @ 2100 RPM
5.440.125262.5 kW @ 2100 RPM
Rated Thrust(kN)50Dimension(mm)786 * 930 * 864Net Weight(kg)740
FlywheelSAE18 16 14Bell HousingSAE0 1ControlsMechanical/Electrical/Pneumatical
  1. The Marine gearbox has the function of reverse, clutch, deceleration and the thrust of the propeller, which is equipped with the main engine to form the Marine power unit. 2. The “transfer capacity” refers to the ratio of the engine’s rated power to the rated speed, and the reduction ratio corresponds to the transmission capacity, which should be less than the number be offered. 3. The gearbox and engine shafting are not allowed to use rigid connection, and the bracket is recommended to be installed on the same rigid support.If the engine is mounted on the elastic support, and the gearbox is installed on the rigid support, please contact the technical department of the company to select the suitable high elastic coupling. 4. The weight of the gearbox is approximation, for different reduction ratio the weight is different. 5. Due to the technical improvement of the products, the products may change without notice. For any other questions please contact our sales engineer.


NameTransverse DirectionLongitudinal Direction
Marine Gearbox15°22.5°7.5°

Optional Accessories of Advance 300 Medium-Low Duty Marine Gearbox

Bell Housing195CInput Coupling1. Highly Flexible Coupling
/2. Toothed Input Coupling
Direction of Input Shaft Rotation1. Anti-clockwise (Facing the Output End)VDOGearbox Pressure  Visible on Bridge
2. Clockwise (Facing the Output End)
Alarm Device1. TemperatureControl System1. Mechanical
2. Working Pressure2. Electrical
3. Lubricating Oil Pressure3. Pneumatical
Gauge Oil Temperature

Modifiable Components of Advance 300 Medium-Low Duty Marine Gearbox

Special Reduction RatioAccording to Customer’s Special RequirementsReplacement of Imported Bearing1. Stronger Endurance
2. Longer Service Life
3. Higher Limit Speed
PTOPower Take OffOutput Shaft CouplingBased on Customers data to produce

Marine Gearboxs Conventional Wearing Parts

External discInternal discSealingPiston ring
GasketRubber sealingThrust plateFilter
Coil type filterPackingO ringInput shaft assembly
Transmission shaft assembyOutput shaft assemblyHydraulic control system

Note: All Above Data are Just for Reference, All Data Might Change Without Notices or Updates, Please Contact Our Sales Team to Confirm All Details Via WhatsApp or Email.

The picture of Sale Manual showing the accessories and scopes of supply.

Engine Sale Manual

The picture of Installation Drawing showing the accessories and scopes of supply.

Installation Drawing

The picture of Installation Manual showing the accessories and scopes of supply.

Installation Manual

The picture of Operation Manual showing the accessories and scopes of supply.

Operation Manual

The picture of Engine Parts Catalogue showing the accessories and scopes of supply.

Parts Catalogue

The picture of Test Report and Certifcate showing the accessories and scopes of supply.

Report & Certifcate

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Sales Team

Marine Sales - Mrs. Gazit Wong WhatApp-Icon

Marine Sale - Mrs. Nora Chen WhatApp-Icon

Ventas españolas - Mrs. Vuctiria WhatApp-Icon

Sales Manager - Mrs. Wendy Fu

Sales Director - Mr. Jasper Lee       WhatApp-Icon

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