Yanmar KMH4A Gear R 2.04 for JH3-DTE / JH4-TE – KMH4AS

Description

Yanmar KMH4A Gear R 2.04 for JH3-DTE / JH4-TE – KMH4AS For Sale

The Yanmar KMH4A Gear R 2.04 for JH3-DTE / JH4-TE – KMH4AS is a genuine Yanmar marine transmission specifically engineered for the proven Yanmar 4JH3-DTE and Yanmar 4JH4-TE marine diesel engine series. Featuring a 2.04:1 reduction ratio, this robust marine gearbox is designed to deliver efficient power transfer, excellent propeller performance, and dependable long-term reliability for cruising yachts, sport fishing boats, commercial vessels, and recreational powerboats.

Built to Yanmar’s exact engineering specifications, the KMH4AS provides seamless integration with compatible turbocharged 4JH engines, ensuring smooth gear engagement, optimized propulsion efficiency, and outstanding vessel maneuverability. The 2.04:1 reduction ratio offers an ideal balance between shaft speed and propeller thrust, making it one of the most versatile gearbox configurations for a wide range of marine applications.

Whether you are replacing an aging transmission, planning a vessel repower, or upgrading your propulsion system, the KMH4AS delivers the durability, performance, and reliability expected from a genuine Yanmar marine transmission.

If you are searching for a Yanmar KMH4AS for sale, comparing Yanmar KMH4AS price options, looking for a dependable Yanmar gearbox for sale, or sourcing a genuine Yanmar marine transmission, Yanmar Marine Experts supplies factory-original Yanmar gearboxes backed by technical expertise and worldwide shipping support.

Technical Specifications

Compatible Engines

The Yanmar KMH4AS is specifically designed for selected turbocharged Yanmar marine diesel engines.

Common applications include:

Compatibility should always be verified before ordering. Our technical team can review your engine serial number, vessel specifications, and existing gearbox information to confirm suitability.

Understanding the 2.04:1 Reduction Ratio

The 2.04:1 reduction ratio provides an excellent balance between propeller speed and thrust generation. This ratio allows the engine to operate efficiently while delivering strong acceleration, reliable cruising performance, and responsive vessel handling.

Benefits of the 2.04:1 reduction ratio include:

• Excellent propeller efficiency
• Strong thrust generation
• Improved docking control
• Enhanced low-speed maneuverability
• Smooth cruising performance
• Optimized fuel economy
• Balanced propulsion characteristics

For many recreational and commercial marine applications, the 2.04:1 ratio delivers the ideal combination of efficiency and performance.

Designed for Yanmar JH Turbocharged Engines

The Yanmar 4JH3-DTE and Yanmar 4JH4-TE engines are widely respected for their durability, fuel efficiency, and dependable marine performance. The KMH4AS is specifically engineered to complement these engines and provide reliable power transmission under demanding operating conditions.

As part of a complete Yanmar propulsion system, the gearbox contributes to:

• Efficient power delivery
• Smooth forward and reverse shifting
• Reduced drivetrain losses
• Reliable vessel maneuverability
• Long-term operational durability

For customers researching a Yanmar 4JH3-DTE for sale, comparing Yanmar 4JH4-TE price options, or planning a propulsion upgrade, selecting the correct marine transmission is critical to achieving optimum vessel performance.

Proven KMH Series Hydraulic Transmission Design

The KMH Series has earned a strong reputation among marine engineers, boatyards, and vessel operators worldwide. Designed for demanding marine environments, these hydraulic transmissions deliver smooth engagement, reliable operation, and long service life.

Advantages include:

• Hydraulic shift operation
• Smooth clutch engagement
• Reliable power transfer
• Compact installation footprint
• Long service life
• Simplified maintenance requirements

These qualities make the KMH4AS a trusted commercial marine gearbox and a popular choice for vessel owners seeking dependable propulsion performance.

Why Choose a Genuine Yanmar Gearbox?

Choosing a genuine Yanmar gearbox helps ensure compatibility between the engine, controls, shaft system, and propeller assembly.

Benefits include:

• Factory-engineered compatibility
• Genuine Yanmar manufacturing standards
• Manufacturer warranty support
• Long-term replacement parts availability
• Reliable propulsion performance
• Simplified future maintenance

For vessel owners investing in a replacement Yanmar gearbox, marine repower gearbox, or complete propulsion upgrade, genuine Yanmar components help maintain the integrity of the entire drivetrain.

Common Applications

The Yanmar KMH4AS is commonly used in:

• Cruising yachts
• Sport fishing boats
• Commercial vessels
• Recreational powerboats
• Marine repower projects
• Transmission replacement projects

For operators searching for a dependable boat transmission for sale, the KMH4AS remains one of the most trusted solutions within the Yanmar marine transmission lineup.

Support from Yanmar Marine Experts

Yanmar Marine Experts specializes exclusively in Yanmar propulsion equipment, including marine gearboxes, saildrives, diesel engines, and genuine replacement parts.

Our team assists customers with:

• Product selection
• Gearbox compatibility verification
• Repower planning
• Technical guidance
• Worldwide shipping arrangements
• After-sales support

As an experienced marine gearbox dealer, trusted marine transmission supplier, and source for Yanmar gearbox USA products, we help customers identify the correct transmission for their vessel requirements.

Availability and Ordering Information

If you are looking to buy Yanmar gearbox equipment or searching for a Yanmar KMH4AS for sale USA, our team can provide current stock availability, lead times, and delivery options.

The Yanmar KMH4AS price may vary depending on inventory availability, destination, and shipping requirements. Likewise, overall Yanmar gearbox price levels may vary based on market conditions and supply chain availability.

For customers comparing propulsion options, we can also provide information regarding other Yanmar gearbox for sale models, reduction ratios, and compatible transmission packages.

What’s Included

When purchasing the Yanmar KMH4A Gear R 2.04 for JH3-DTE / JH4-TE – KMH4AS, your package may include:

• Genuine Yanmar KMH4AS Marine Gearbox
• Factory documentation
• Manufacturer warranty coverage
• Technical assistance from Yanmar Marine Experts
• Compatibility verification support

Package contents may vary depending on factory supply specifications.

Warranty and Technical Support

The KMH4AS is supplied with applicable manufacturer warranty coverage.

Our team remains available to assist with:

• Engine compatibility verification
• Gearbox selection guidance
• Reduction ratio recommendations
• Product selection support
• Worldwide logistics arrangements

Whether you are sourcing a replacement Yanmar gearbox, installing a marine repower gearbox, or upgrading a complete propulsion package, our specialists can help ensure you receive the correct solution.

Frequently Asked Questions

Is the KMH4AS a genuine Yanmar gearbox?

Yes. We supply only genuine Yanmar marine transmissions backed by manufacturer warranty support.

Which engines are compatible with the KMH4AS?

The KMH4AS is designed primarily for the Yanmar 4JH3-DTE and Yanmar 4JH4-TE marine diesel engines.

What does the 2.04:1 reduction ratio provide?

The 2.04:1 ratio delivers an excellent balance of thrust, maneuverability, fuel efficiency, and cruising performance.

Is the KMH4AS suitable for repower projects?

Yes. The KMH4AS is frequently selected for marine repower gearbox installations, transmission replacements, and propulsion upgrades.

How do I get the latest Yanmar KMH4AS price?

Contact our sales team for current pricing, stock availability, lead times, and delivery options.

Request a Quote

Interested in the Yanmar KMH4A Gear R 2.04 for JH3-DTE / JH4-TE – KMH4AS for sale?

Contact Yanmar Marine Experts today for the latest Yanmar KMH4AS price, current stock availability, and worldwide shipping options.

For the fastest assistance, please provide:

• Engine model
• Engine serial number
• Current gearbox model
• Vessel make and model
• Delivery destination

Our technical specialists will review your requirements and provide a tailored quotation along with compatibility guidance, availability information, and shipping options.