Description
Yanmar 4JH110: Engine Overview
The Yanmar 4JH110 Marine Diesel Engine 110hp is part of Yanmar’s JH-CR marine diesel engine family, a range designed for sailboat and small-craft propulsion. Yanmar currently lists the JH-CR Series across outputs from 40 to 110 mhp, with the 4JH110 representing the highest-output model in the series.
The 4JH110 produces a rated 80.9 kW / 110 mhp at 3,200 rpm from a 2.0-liter displacement. Its four-cylinder, vertical configuration provides a compact engine package while maintaining the output required for appropriately sized marine applications.
The engine is equipped with direct fuel injection and Bosch Common Rail technology, combined with turbocharging and intercooling. This modern configuration allows the engine to deliver its rated output while maintaining the compact dimensions expected from the JH series.
Power, Fuel System, and Engine Design
At the core of the 4JH110 is a 2.0-liter, four-cylinder diesel engine with an 84 mm bore and 90 mm stroke. Yanmar specifies the engine as a four-stroke, vertical, water-cooled diesel with direct injection.
The Bosch Common Rail fuel system provides electronically managed high-pressure fuel delivery. This replaces the simpler mechanical injection arrangement found on some earlier generations of marine diesel engines.
The engine is also turbocharged and intercooled, helping the powerplant produce its 80.9 kW rated output from relatively compact displacement. Yanmar’s current specifications specifically identify turbocharging and intercooling as part of the 4JH110 configuration.
For boat owners considering a repower, this combination makes the 4JH110 particularly relevant where a modern 110hp diesel is required without moving to a substantially larger engine platform.
Marine Cooling and Operating Design
The 4JH110 uses a freshwater cooling system supported by a centrifugal freshwater pump and a rubber-impeller seawater pump. This arrangement separates the engine’s internal cooling circuit from direct seawater circulation through the engine.
The freshwater-cooled configuration is an important part of the engine’s marine design and is suited to the operating demands associated with marine propulsion.
The engine also uses an enclosed forced lubrication system, while the flexible rubber-type engine mounting helps isolate the engine from the vessel structure.
Proper maintenance of the cooling, lubrication, fuel, and seawater systems remains essential to maintaining reliable marine engine operation.
Installation and Marine Gear Options
The 4JH110 can be supplied for different propulsion arrangements depending on the selected configuration. Yanmar’s official documentation lists compatible marine gear options including KM4A2, KMH4A, ZF25, ZF25A, ZF30M, and KMH50V-2, as well as a bobtail configuration.
Yanmar also identifies the SD110 Saildrive as a compatible drive for the 4JH110. The SD110 installation has a combined dry engine-and-drive weight of approximately 319 kg, compared with approximately 229 kg for the engine without the drive.
Because marine gear selection affects the overall installation, buyers should confirm the required transmission or saildrive configuration before completing an engine purchase.
Compact Dimensions and Practical Installation
The 4JH110 has published engine dimensions of approximately 909 mm × 613 mm × 675 mm, with a dry engine weight of approximately 229 kg without gear.
Its compact four-cylinder architecture makes it suitable for vessels where available engine-room space is an important consideration.
The actual installation footprint can vary depending on the selected marine gear, exhaust elbow, and other equipment. Yanmar specifically notes that dimensions may vary with different gears or elbow configurations.
For repower projects, the available engine-room dimensions should therefore be compared with the complete proposed engine and transmission package rather than the bare engine dimensions alone.
Electrical System and Engine Controls
The 4JH110 is equipped with a 12V 125A alternator, providing electrical generation capability for the vessel’s onboard systems. Yanmar lists mechanical controls for the current model, with a VC20 system available as an option.
The engine also uses an electric starting system, with Yanmar’s technical documentation specifying a 12V, 1.4 kW starter.
This makes the 4JH110 suitable for installations where conventional marine engine controls and a 12V electrical system are preferred.
Emissions and Marine Certification
The 4JH110 is designed to meet specified marine emissions and regulatory requirements. Yanmar currently lists RCD 2, EPA Tier 3, EPA Tier 3C, BSO II, EMC, and SOLAS among the certifications and compliance standards associated with the engine platform.
The exact certification applicable to an installation can depend on the market, vessel type, configuration, and selected equipment.
For commercial or regulated marine installations, buyers should confirm the applicable certification requirements for their specific vessel and operating jurisdiction before ordering.
Who This Engine Is Best For
The Yanmar 4JH110 Marine Diesel Engine 110hp is best suited to boat owners, marine repower customers, sailboat operators, and small-craft owners whose vessels require approximately 110 mhp of diesel propulsion.
It is particularly relevant for buyers looking for:
- 110 mhp marine diesel power
- A compact four-cylinder engine
- Bosch Common Rail direct injection
- Turbocharged and intercooled operation
- Freshwater cooling
- Electric starting
- Compatibility with selected marine gears and the SD110 Saildrive
The vessel’s required horsepower, engine-room dimensions, transmission, shaft arrangement, exhaust configuration, and control system should all be confirmed before purchase.
Technical Specifications
| Specification | Details |
|---|---|
| Product | Yanmar 4JH110 Marine Diesel Engine |
| Model | 4JH110 |
| Rated Output | 80.9 kW / 110 mhp |
| Rated Speed | 3,200 rpm |
| Displacement | 2.0 L / 122 cu. in. |
| Cylinders | 4, Inline |
| Bore × Stroke | 84 × 90 mm |
| Engine Type | 4-Stroke, Vertical, Water-Cooled Diesel |
| Combustion System | Direct Injection |
| Fuel System | Bosch Common Rail |
| Aspiration | Turbocharged & Intercooled |
| Cooling System | Freshwater Cooling + Seawater Pump |
| Starting System | Electric, 12V – 1.4 kW |
| Alternator | 12V – 125A |
| Controls | Mechanical; VC20 optional |
| Dry Weight Without Gear | 229 kg / 505 lb |
| Dimensions | 909 × 613 × 675 mm |
| Emissions / Certifications | RCD 2, EPA Tier 3, EPA Tier 3C, BSO II, EMC, SOLAS |
| Compatible Drives | Selected marine gears and SD110 Saildrive |
Technical specifications are based primarily on Yanmar’s current official 4JH110 product information and technical documentation.
Ordering, Fitment, and Support
Before purchasing the Yanmar 4JH110 Marine Diesel Engine 110hp, buyers should verify that the vessel is appropriately rated for the engine’s output and that sufficient engine-room space is available.
Transmission selection is also important. The 4JH110 is compatible with multiple marine gear configurations, while the SD110 Saildrive provides another installation option for suitable vessels.
For repower projects, providing the existing engine model, transmission or saildrive, shaft arrangement, available engine-room dimensions, and control configuration can help establish the appropriate replacement configuration.
The 4JH110 can also be considered alongside related Yanmar marine diesel engines and marine propulsion systems when comparing power requirements, installation dimensions, and drive arrangements.
Frequently Asked Questions
How much power does the Yanmar 4JH110 produce?
The Yanmar 4JH110 produces 80.9 kW or 110 mhp at 3,200 rpm. It uses a 2.0-liter, four-cylinder diesel configuration with direct injection, Bosch Common Rail fuel delivery, and turbocharging with intercooling.
Is the Yanmar 4JH110 turbocharged?
Yes. The 4JH110 uses a turbocharged and intercooled induction system. This allows the 2.0-liter four-cylinder engine to produce its rated 80.9 kW / 110 mhp output at 3,200 rpm.
What fuel system does the 4JH110 use?
The 4JH110 uses Bosch Common Rail direct fuel injection. This is a modern high-pressure fuel system designed to provide controlled fuel delivery to the engine’s four-cylinder powerplant.
What is the dry weight of the Yanmar 4JH110?
The engine has a published dry weight of approximately 229 kg (505 lb) without the marine gear. The total installation weight will be higher when a transmission, saildrive, exhaust components, and other equipment are included.
What marine transmissions can be used with the 4JH110?
Yanmar lists several compatible marine gear options, including KM4A2, KMH4A, ZF25, ZF25A, ZF30M, and KMH50V-2, depending on the configuration. A bobtail version is also available.
Can the Yanmar 4JH110 be used with a Saildrive?
Yes. Yanmar identifies the SD110 Saildrive as compatible with the 4JH110. The engine and SD110 combination has a published dry weight of approximately 319 kg, although the complete installation will vary according to the selected equipment.
What should I verify before buying the 4JH110?
Buyers should confirm the vessel’s required horsepower, engine-room dimensions, transmission or saildrive requirement, control system, exhaust arrangement, and applicable emissions certification. For a repower, comparing the existing engine and drive configuration with the proposed 4JH110 package is particularly important.
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