Yanmar 6HA2M-WHT 350HP Marine Inboard Diesel Engine
The Yanmar 6HA2M-WHT 350HP Marine Inboard Engine is a robust six-cylinder diesel propulsion engine designed for commercial fishing vessels, workboats, passenger craft, and marine repowering applications.
Delivering 350 metric HP (257 kW) at 1,950 RPM, the engine features a 13.14-litre displacement, direct fuel injection, turbocharging, and freshwater-cooled intercooling.
With conventional mechanical engine controls and a heavy-duty construction, the Yanmar 6HA2M-WHT offers reliable propulsion for vessels requiring strong torque and dependable marine diesel performance.
Why Choose the Yanmar 6HA2M-WHT?
Powerful 350 HP Performance
The engine delivers 350 metric HP at a relatively low rated speed of 1,950 RPM, making it suitable for compatible commercial marine propulsion systems.
Turbocharged and Intercooled Design
The turbocharger and intercooler support efficient combustion and high power output from the six-cylinder diesel engine.
Mechanical Engine Controls
Its mechanical control arrangement provides conventional engine operation without requiring a modern electronic common-rail management system.
Robust Commercial Marine Construction
The engine features a durable six-cylinder design, freshwater cooling, and compatible heavy-duty marine transmissions.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Yanmar Marine |
| Engine Model | 6HA2M-WHT |
| Engine Type | Four-stroke marine diesel |
| Configuration | Inline six-cylinder |
| Displacement | 13.140 litres |
| Rated Power — M-Rating | 350 metric HP / 257 kW |
| Rated Speed — M-Rating | 1,950 RPM |
| H-Rating Power | 278 metric HP / 204 kW |
| H-Rating Speed | 1,880 RPM |
| Bore × Stroke | 130 × 165 mm |
| Fuel Injection | Direct injection |
| Engine Controls | Mechanical |
| Aspiration | Turbocharged and intercooled |
| Cooling System | Freshwater cooling with heat exchanger |
| Starting System | 24V electric starter |
| Starter Motor | 6.0 kW |
| Flywheel Housing | SAE No. 1 |
| Flywheel Size | 14 inches |
| Dry Engine Weight | Approximately 1,455 kg without gearbox |
| Engine Dimensions (L × W × H) | 1,585 × 1,016 × 1,260 mm |
| Lubricating Oil Capacity | 38 litres |
| Engine Coolant Capacity | Approximately 66 litres |
| Emissions | IMO Tier II |
| Propulsion | Conventional inboard shaft drive |
| Applications | Fishing vessels, workboats, passenger boats and repowering |
Specifications are based on Yanmar’s published technical documentation. The 350 metric HP rating is approximately 345 mechanical horsepower.
Compatible Marine Gearboxes and Controls
The Yanmar 6HA2M-WHT supports manufacturer-documented hydraulic marine transmissions.
| Marine Gearbox | Reduction Ratios |
|---|---|
| Yanmar YX-120 | 2.03:1 / 2.57:1 / 3.04:1 / 3.55:1 |
| Yanmar YX-120L | 4.00:1 / 4.59:1 |
Both transmissions use hydraulic multi-disc clutch technology.
The correct gearbox ratio must be selected according to vessel displacement, propeller dimensions, shaft arrangement, and operating conditions.
Compatible equipment includes mechanical engine controls, marine instrumentation, engine alarms, and installation-specific propulsion accessories.
Applications and Duty Ratings
The Yanmar 6HA2M-WHT is designed for commercial marine propulsion, including fishing vessels, workboats, passenger craft, and compatible displacement vessels.
Yanmar publishes two operating ratings:
| Rating | Output | Rated Speed |
|---|---|---|
| M-Rating | 350 metric HP / 257 kW | 1,950 RPM |
| H-Rating | 278 metric HP / 204 kW | 1,880 RPM |
The appropriate rating depends on the vessel’s operating profile and manufacturer-approved duty requirements.
The 350 HP M-rating should not be presented as the engine’s continuous heavy-duty output.
Price, Package Contents and Warranty
Price: Contact JB Marine GmbH for a quotation.
Depending on the selected configuration, the package may include the Yanmar 6HA2M-WHT engine, starter motor, cooling equipment, mechanical engine controls, instrumentation, and a compatible marine gearbox.
The gearbox, alternator, exhaust equipment, wiring, engine mounts, and installation accessories must be specifically confirmed in the quotation.
Warranty: Applicable manufacturer or seller warranty coverage depends on the engine’s condition, production year, and supply arrangement. Full warranty terms will be confirmed before purchase.
Frequently Asked Questions
How Much Power Does the Yanmar 6HA2M-WHT Produce?
The engine delivers 350 metric HP (257 kW) at 1,950 RPM under its M-rating.
What Is the Displacement of the 6HA2M-WHT?
It has a displacement of 13.14 litres.
Is the Yanmar 6HA2M-WHT Turbocharged?
Yes. It features turbocharging and freshwater-cooled intercooling.
Does the Engine Use Electronic Common-Rail Injection?
No. It uses conventional direct diesel injection with mechanical engine controls.
Which Gearboxes Are Compatible?
Manufacturer-documented options include the Yanmar YX-120 and YX-120L marine transmissions.
Is the Yanmar 6HA2M-WHT Suitable for Commercial Vessels?
Yes. It is designed for commercial marine propulsion, subject to the appropriate duty rating and installation requirements.
Buy the Yanmar 6HA2M-WHT from JB Marine GmbH
Looking for a Yanmar 6HA2M-WHT 350HP marine diesel engine for sale?
JB Marine GmbH provides quotations for Yanmar marine diesel engines, compatible marine transmissions, propulsion accessories, and international shipping.
Contact our sales team with your vessel specifications, preferred gearbox ratio, required quantity, and delivery destination.
Request your Yanmar 6HA2M-WHT quotation today.
Website: https://jbmarinegmbh.de/
