Yanmar KMH50A-3 RR 2.43 Gearbox for 4LV Series (M-Shift) – KMH50A-3 243 4LV
The Yanmar KMH50A-3 RR is an angle reduction gear unit for 4LV series marine diesel engines with mechanical (M-Shift) control, set at a 2.43:1 reduction with right-hand output rotation. It carries torque from the engine to the propeller shaft on shaft-driven sailboats and powerboats.
An OEM Yanmar propulsion component, this KMH50A-3 version (code KMH50A-3 243 4LV) is meant for installations that specify both the 2.43 ratio and right-hand rotation on a compatible 4LV engine using mechanical shift. It follows the original equipment specification for that configuration, so check ratio, rotation and shift type against the existing setup before fitting.
Highlights
2.43:1 reduction ratio
Right-hand (RR) output rotation
For Yanmar 4LV series marine diesel engines
Mechanical shift (M-Shift) version
Angle reduction gear for shaft-driven boats
Specifications
Brand | Yanmar |
Model | KMH50A-3 |
Model Code | KMH50A-3 243 4LV |
Type | Angle reduction gear |
Reduction Ratio | 2.43:1 |
Output Rotation | Right-hand (RR) |
Shift Type | Mechanical (M-Shift) |
Engine Compatibility | Yanmar 4LV series |
Good to know
Installation, rigging and commissioning by a qualified marine technician are recommended; follow the manufacturer's pre-delivery and break-in procedures.