Yanmar KMH4A Gear R 2.45 for JH3-DTE / JH4-TE – KMH4AG

Description

Yanmar KMH4A Gear R 2.45 for JH3-DTE / JH4-TE – KMH4AG For Sale

The Yanmar KMH4A Gear R 2.45 for JH3-DTE / JH4-TE – KMH4AG is a genuine Yanmar marine transmission specifically engineered for the reliable Yanmar 4JH3-DTE and Yanmar 4JH4-TE marine diesel engine series. Featuring a 2.45:1 reduction ratio, this heavy-duty hydraulic marine gearbox is designed to deliver increased propeller thrust, superior low-speed maneuverability, and dependable power transfer for cruising yachts, sport fishing vessels, commercial workboats, and marine repower projects.

Built to Yanmar’s exact engineering standards, the KMH4AG integrates seamlessly with compatible turbocharged JH engines to create a highly efficient propulsion package. The higher reduction ratio allows larger propellers to operate more effectively, making it an excellent choice for vessels requiring greater torque, improved docking control, and enhanced performance under load.

Whether you are replacing an existing transmission, upgrading your propulsion system, or undertaking a complete vessel repower, the KMH4AG delivers the durability, efficiency, and reliability expected from a genuine Yanmar marine transmission.

If you are searching for a Yanmar KMH4AG for sale, comparing Yanmar KMH4AG 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 KMH4AG is designed specifically for selected turbocharged Yanmar marine diesel engines.

Common applications include:

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

Understanding the 2.45:1 Reduction Ratio

The 2.45:1 reduction ratio is designed for vessel owners seeking increased propeller torque and enhanced propulsion efficiency. By reducing propeller shaft speed relative to engine RPM, the gearbox enables larger propellers to generate greater thrust while maintaining efficient engine operation.

Benefits of the 2.45:1 reduction ratio include:

• Increased propeller thrust
• Enhanced docking control
• Superior low-speed maneuverability
• Improved performance under load
• Better fuel efficiency at cruising speeds
• Reduced drivetrain stress
• Optimized propulsion efficiency

For heavier cruising yachts, sport fishing boats, and commercial vessels, the 2.45:1 ratio provides an excellent balance between power delivery and operational efficiency.

Designed for Yanmar JH Turbocharged Engines

The Yanmar 4JH3-DTE and Yanmar 4JH4-TE engines have earned a reputation worldwide for reliability, fuel economy, and long service life. The KMH4AG is engineered specifically to complement these engines and provide smooth, dependable power transmission in demanding marine environments.

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

• Efficient power delivery
• Smooth forward and reverse engagement
• 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 gearbox ratio is essential to maximizing vessel performance.

Proven KMH Series Hydraulic Transmission Design

The KMH Series has become one of Yanmar’s most respected hydraulic transmission platforms. Designed for continuous marine operation, these gearboxes deliver dependable performance under demanding operating conditions.

Advantages include:

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

These qualities make the KMH4AG a trusted commercial marine gearbox and a popular choice among marine engineers, boatyards, and vessel operators worldwide.

Why Choose a Genuine Yanmar Gearbox?

Choosing a genuine Yanmar gearbox helps ensure complete 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 servicing

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 KMH4AG is commonly used in:

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

For operators searching for a dependable boat transmission for sale, the KMH4AG remains one of the most trusted options within the Yanmar marine transmission range.

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 KMH4AG for sale USA, our team can provide current stock availability, lead times, and delivery options.

The Yanmar KMH4AG 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 2.45 for JH3-DTE / JH4-TE – KMH4AG, your package may include:

• Genuine Yanmar KMH4AG 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 KMH4AG 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 KMH4AG a genuine Yanmar gearbox?

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

Which engines are compatible with the KMH4AG?

The KMH4AG is designed primarily for the Yanmar 4JH3-DTE and Yanmar 4JH4-TE marine diesel engines.

What does the 2.45:1 reduction ratio provide?

The 2.45:1 ratio delivers increased propeller thrust, enhanced low-speed maneuverability, improved docking control, and excellent performance under load.

Is the KMH4AG suitable for repower projects?

Yes. The KMH4AG is frequently selected for marine repower gearbox installations, transmission replacements, and propulsion upgrades.

How do I get the latest Yanmar KMH4AG 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 2.45 for JH3-DTE / JH4-TE – KMH4AG for sale?

Contact Yanmar Marine Experts today for the latest Yanmar KMH4AG 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.