Yanmar 4CHE3 85HP Diesel Marine Inboard Engine
The Yanmar 4CHE3 85HP Diesel Marine Inboard Engine is a reliable four-cylinder diesel propulsion engine designed for fishing boats, workboats, displacement cruisers, and compatible marine repowering projects.
Delivering 85 metric HP (62.5 kW) at 2,600 RPM under its L-rating, the Yanmar 4CHE3 features a 4.33-litre naturally aspirated diesel engine, direct fuel injection, mechanical engine controls, and freshwater cooling through a heat exchanger.
Designed for conventional shaft-drive propulsion, the Yanmar 4CHE3 combines straightforward maintenance, robust construction, and practical fuel efficiency.
Why Choose the Yanmar 4CHE3?
Reliable 85 HP Diesel Performance
The 4CHE3 provides dependable propulsion at moderate engine speeds, making it suitable for displacement vessels and compatible commercial marine applications.
Naturally Aspirated Engine Design
Its four-cylinder engine operates without a turbocharger, reducing the complexity of the intake system and simplifying routine servicing.
Direct Diesel Fuel Injection
The direct-injection fuel system supports efficient combustion, reliable operation, and conventional mechanical maintenance.
Durable Marine Construction
With a heat-exchanger cooling system and compatible hydraulic marine transmission, the 4CHE3 is engineered for dependable inboard propulsion.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Yanmar |
| Engine Model | 4CHE3 |
| Engine Type | Four-stroke marine diesel |
| Configuration | Inline four-cylinder |
| Displacement | 4.330 litres |
| Maximum Power — L-Rating | 85 metric HP / 62.5 kW |
| Rated Speed — L-Rating | 2,600 RPM |
| Power — M-Rating | 78 metric HP / 57.4 kW |
| Rated Speed — M-Rating | 2,550 RPM |
| Bore × Stroke | 105 × 125 mm |
| Fuel Injection | Direct injection |
| Aspiration | Naturally aspirated |
| Engine Controls | Mechanical |
| Cooling System | Freshwater cooling with heat exchanger |
| Starting System | 24V electric starter |
| Starter Motor | 4.0 kW |
| Flywheel Housing | SAE No. 3 |
| Flywheel Size | 11.5 inches |
| Marine Gearbox | Yanmar YX-30 |
| Dry Engine Weight | Approximately 500 kg without gearbox |
| Dry Weight with Gearbox | Approximately 570 kg |
| Dimensions with YX-30 Gearbox | 1,258 × 688 × 1,022 mm |
| Lubricating Oil Capacity | Approximately 15 litres |
| Freshwater Cooling Capacity | 16 litres plus 0.8-litre reservoir |
| Propulsion | Conventional inboard shaft drive |
| Applications | Fishing boats, workboats, cruisers and repowering |
Specifications are based on Yanmar’s published 4CHE3 technical documentation. The 85 HP rating is expressed in metric horsepower and corresponds to approximately 83.8 mechanical horsepower.
Compatible Marine Gearboxes and Controls
The Yanmar 4CHE3 is documented with the Yanmar YX-30 hydraulic marine transmission.
| Marine Gearbox | Reduction Ratio |
|---|---|
| Yanmar YX-30 | 2.03:1 |
| Yanmar YX-30 | 2.55:1 |
| Yanmar YX-30 | 2.96:1 |
| Yanmar YX-30 | 3.48:1 |
The YX-30 uses a wet-type hydraulic multi-disc clutch and supports appropriate shaft-drive propulsion arrangements.
Compatible installation equipment may include mechanical throttle and shift controls, Yanmar engine instrumentation, warning alarms, wiring, and suitable engine mounts.
The correct reduction ratio and propeller must be selected according to vessel displacement, hull characteristics, and intended operating conditions.
Applications and Duty Ratings
The Yanmar 4CHE3 is suitable for fishing vessels, workboats, displacement cruisers, and other compatible marine propulsion applications.
Yanmar publishes two power ratings:
| Rating | Output | Rated Speed |
|---|---|---|
| L-Rating | 85 metric HP / 62.5 kW | 2,600 RPM |
| M-Rating | 78 metric HP / 57.4 kW | 2,550 RPM |
The appropriate rating should be selected according to the vessel’s operating profile and Yanmar’s approved duty requirements.
The advertised 85 HP output is the L-rating and should not be represented 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 4CHE3 engine, 24V starter motor, heat-exchanger cooling system, engine mounts, instrument panel, and compatible YX-30 marine gearbox.
The gearbox, wiring harness, exhaust components, shaft coupling, and other 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 4CHE3 Produce?
The engine delivers 85 metric HP (62.5 kW) at 2,600 RPM under its L-rating.
What Is the Displacement of the Yanmar 4CHE3?
The engine has a displacement of 4.33 litres.
Is the Yanmar 4CHE3 Turbocharged?
No. It is a naturally aspirated four-cylinder diesel engine.
What Starting Voltage Does the Engine Use?
The manufacturer’s documented configuration uses a 24V, 4.0 kW electric starter motor.
Which Marine Gearbox Is Compatible?
The Yanmar YX-30 hydraulic marine transmission is a documented option, with reduction ratios from 2.03:1 to 3.48:1.
Is the Yanmar 4CHE3 Suitable for Repowering?
Yes, provided the vessel’s engine mounts, shaft alignment, gearbox, propeller, cooling system, and exhaust installation are compatible.
Buy the Yanmar 4CHE3 from JB Marine GmbH
Looking for a Yanmar 4CHE3 85HP diesel marine inboard engine for sale?
JB Marine GmbH provides quotations for Yanmar marine diesel engines, compatible marine gearboxes, propulsion accessories, and international shipping.
Contact our sales team with your vessel specifications, preferred gearbox ratio, required quantity, and delivery destination.
Request your Yanmar 4CHE3 85HP quotation today.
Website: https://jbmarinegmbh.de/
