Main advantages of marine diesel engines gearbox:
1. its speed range is 1500-2500r/min, Low fuel consumption,The minimum fuel consumption of 
226B engine is 198g/kW.h. it's fuel consumption curve is very flat. It has 
good economy under common working condition.Reliable operation
2. WD615 series marine diesel engine has been developed since 1989. It was 
supplemented with inter-cooler, exchanger for seawater and freshwater, 
monitor and seawater pump 
3. WD618 marine engine, according to the requirement of vessels, WD618C 
series marine diesel engines has the merits of large power backup, low fuel 
consumption, low emission, high reliability, easy operation and convenient 
maintenance. The output ranges from 150-275kW with a speed of 
1500-2150r/min. It can be widely used in various kinds of vessels. MB270A, 
300, D300 series gear boxes can be applied to the engine sets with the 
speed ratio from 2:1 - 7:1
4. For marine diesel engines 6170C, output ranges from 258-330kW for engines 
of 1000 r/min, and 258-382kW for engines of 1200r/min, 258-426kW for 
1350r/min and 258-456kW for 1500r/min
5. The R6160 series marine engine, designed out of brand new conception, has 
reached internationally advanced position.The speed of R6160 series is 
1000r/min with a power range of 164kW(223hp)-255kW(350hp)