Yanmar KMH4A Marine Gearbox for JH3-DTE/JH4-TE, 2.04:1 Reduction (KMH4AS)
The Yanmar KMH4AS is a KMH4A inboard marine reduction gearbox with a 2.04 ratio for Yanmar JH3-DTE and JH4-TE diesel engines. It links the engine to the propeller shaft on sailboats and auxiliary powerboats with inboard diesel power.
This OEM Yanmar gearbox suits JH3-DTE and JH4-TE engines specified for KMH4A-series 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 is used to replace an existing transmission, to repower with a compatible JH-series engine, or in new installations built to a defined drivetrain configuration.
Highlights
Yanmar KMH4A inboard reduction gearbox
2.04:1 reduction ratio
For Yanmar JH3-DTE and JH4-TE diesel engines
Part number KMH4AS
Fits approved mounts, controls and shafting when installed to spec
Specifications
Brand | Yanmar |
Model | KMH4A |
Part Number | KMH4AS |
Reduction Ratio | 2.04:1 |
Engine Compatibility | Yanmar JH3-DTE, JH4-TE |
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.