... ,reducer,gear transmission,couplings,damages, gear unit,marine gearbox Business Type:Manufacturer,Trading 40A Marine gearbox manufacturer,high quality,competive price and ... of 0.0294kw/rpm. It can be coupled with various marine diesel engines of equivalent torque(e.g. the type of ... oil must be kept clean.2. During normal reversing, at first ensuing speed should be reduced, and let the control button ...