Yanmar KM4A Marine Gearbox for 4JH5, 2.14:1 Reduction (KM4AS-5)
The Yanmar KM4AS-5 is a KM4A marine gearbox with a 2.14 reduction ratio for Yanmar 4JH5-series diesel engines. It transfers engine output to the propeller shaft in inboard diesel installations on sailboats and auxiliary powerboats.
This OEM Yanmar gearbox is specified for 4JH5-series engines in KM4A gear applications. Fitted per the manufacturer's specifications, it connects to approved engine mounts, controls and shafting with no modification required, and the drivetrain stays accurately aligned. It suits replacing an existing transmission, repowering with a compatible 4JH5 engine or equipping a new inboard installation.
Highlights
Yanmar KM4A marine gearbox
2.14:1 reduction ratio
For Yanmar 4JH5-series diesel engines
Part number KM4AS-5
Fits approved mounts, controls and shafting when installed to spec
Specifications
Brand | Yanmar |
Model | KM4A |
Part Number | KM4AS-5 |
Reduction Ratio | 2.14:1 |
Engine Compatibility | Yanmar 4JH5 series |
Application | Inboard diesel, sailboats and auxiliary powerboats |
Good to know
Installation, rigging and commissioning by a qualified marine technician are recommended; follow the manufacturer's pre-delivery and break-in procedures.