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The Yanmar 4JH110 110HP inboard diesel engine is a four-cylinder marine diesel designed for sailboat and recreational propulsion. It produces a rated output of 80.9 kW / 110 MHP at 3,200 rpm from a 2.0-liter displacement, using direct injection, a Bosch common rail fuel system and turbocharged, intercooled air charging. Yanmar places the 4JH110 within its JH-CR series for sailboat and small-craft propulsion.
The engine combines a relatively compact four-cylinder package with a 12V 125A alternator, mechanical controls and flexible mounting. Yanmar lists a dry weight of approximately 229 kg (505 lb) without marine gear and dimensions of 909 × 613 × 675 mm. The published length includes the KM4A2 marine gear, so the exact installation envelope can vary with the selected transmission or exhaust arrangement.
The 4JH110 delivers 110 MHP at 3,200 rpm and uses a 1.995-liter-class four-cylinder diesel configuration. Yanmar’s technical documentation identifies the engine as a vertical, water-cooled four-stroke diesel with direct injection and turbocharged air charging.
The common rail system electronically manages fuel injection timing and pressure. Yanmar’s technical documentation identifies variable injection timing and variable injection pressure, with maximum injection pressure listed at 160 MPa. This architecture allows the 4JH110 to combine a relatively small displacement with its 110 MHP rated output.
| Specification | Yanmar 4JH110 |
|---|---|
| Rated output | 80.9 kW / 110 MHP |
| Rated speed | 3,200 rpm |
| Displacement | 2.0 L / 122 cu. in. |
| Cylinders | 4 |
| Bore × stroke | 84 × 90 mm / 3.31 × 3.54 in. |
| Combustion system | Direct injection, Bosch Common Rail System |
| Aspiration | Turbocharged and intercooled |
| Alternator | 12V – 125A |
| Controls | Mechanical; optional VC20/related vessel-control equipment |
| Cooling | Fresh-water cooling with heat exchanger |
| Dry weight without gear | 229 kg / 505 lb |
| Published dimensions | 909 × 613 × 675 mm |
| Engine mounting | Flexible mounting |
| Certifications listed by Yanmar | RCD 2, EPA Tier 3, EPA Tier 3C, BSO II, EMC, SOLAS |
Yanmar states that the published dimensions include the KM4A2 marine gear and that dimensions may vary with other gears or exhaust elbows. For a repower, use the dimensional drawing for the exact engine and propulsion package rather than relying only on the basic engine dimensions.
The 4JH110 uses direct injection with a Bosch common rail system. Common rail fuel delivery allows the engine’s electronic control system to vary injection timing and pressure. Yanmar’s technical documentation lists variable injection timing and variable pressure, with maximum injection pressure specified at 160 MPa.
For installation or repower work, the fuel system should be planned as part of the complete engine package. Confirm fuel filtration, water separation, fuel-line routing and service access, and follow Yanmar’s installation requirements for the specific vessel and engine configuration.
The 4JH110 uses a turbocharged and intercooled air system. Yanmar’s specification describes the engine as a vertical water-cooled four-stroke diesel with turbocharged air charging and an air cooler.
Turbocharging allows the engine to use compressed intake air to support combustion at its rated output, while the intercooler reduces the temperature of the compressed intake charge. Together with the common rail system, this supports the 4JH110’s 110 MHP rating from its 2.0-liter displacement.
The Yanmar 4JH110 uses coolant cooling with a heat exchanger, combined with a seawater circuit for marine cooling. Yanmar’s technical documentation identifies fresh-water cooling through a centrifugal water pump and a rubber-impeller seawater pump.
When installing the engine, confirm the cooling-water connections, seawater intake, exhaust mixing arrangement and heat-exchanger service access. Correct installation is important for maintaining the engine’s designed operating temperature under load.
A 12V 125A alternator is part of the 4JH110 specification. This provides charging capacity for the vessel’s 12V electrical system while the engine is running, subject to the battery bank, electrical loads and charging configuration.
The product package can also be configured with a secondary alternator according to Yanmar’s published options. Available configurations include a second 12V 125A alternator or a 24V 60A option. Confirm the selected electrical configuration before ordering if additional charging capacity is required.
The standard 4JH110 uses mechanical controls. Yanmar also identifies optional vessel-control equipment for the engine, including its VC20 system. Optional panels, extension harnesses and second-station equipment can be selected according to the vessel’s control layout.
The standard engine package listed by Yanmar includes a B25 panel, mechanical throttle sensor, flexible mounts, a fuel pre-filter with water separator, fresh-water expansion tank and belt safety cover. Optional equipment includes a C35 panel, second station, sidemount control head, NMEA 2000 engine monitoring and other installation accessories.
The 4JH110 is offered with several marine propulsion configurations. Yanmar’s current product information identifies the KM4A2 marine gear as the reference configuration for its published dimensions and lists compatible shaft-drive gears and the SD110 saildrive.
Yanmar’s technical documentation also lists other compatible marine gear models, including ZF30M, ZF25, KMH4A, ZF25A and KMH50V configurations depending on the installation. The correct transmission or saildrive depends on the vessel’s propulsion layout, shaft alignment, reduction ratio and propeller requirements.
The 4JH110 is a 229 kg engine before the selected marine gear and other installation components are added. When replacing an older engine, compare the complete installation rather than simply checking horsepower. Engine-bed dimensions, mounts, transmission, shaft alignment, propeller, exhaust, cooling, fuel lines, electrical connections and control cables all need to be compatible.
The published engine dimensions are 909 × 613 × 675 mm, but Yanmar notes that dimensions can vary with other gears and exhaust elbows. Leave appropriate service access around the engine for oil, filter, cooling-system, belt and electrical maintenance.
Yanmar places the 4JH110 within the JH-CR family for sailboat and small-craft propulsion. The series covers 40–110 MHP models, with the 4JH110 serving as the 110 MHP model.
The engine can therefore be considered for sailboat propulsion, recreational marine applications and repower projects where a 110 MHP common rail diesel is appropriate. Final suitability depends on vessel displacement, hull design, propulsion arrangement, manufacturer requirements and the required operating profile.
If you are comparing the Yanmar 4JH110 with other marine propulsion options, explore our inboard marine engines category. Compare horsepower, displacement, engine weight, dimensions, fuel system, controls and transmission options before choosing an engine for a new installation or repower.
For availability, compatibility or installation questions, you can also contact Performance Engines before ordering.
Yanmar rates the 4JH110 at 80.9 kW / 110 MHP at 3,200 rpm. Yanmar’s operation documentation also lists a continuous-power figure of 73.6 kW at 3,101 rpm, so the intended operating rating should be distinguished from the maximum rated output.
The 4JH110 uses direct injection with a Bosch common rail system. Yanmar’s documentation identifies variable injection timing and variable injection pressure as part of the engine’s fuel-control system.
Yes. The 4JH110 uses turbocharged and intercooled air charging. Yanmar identifies it as a four-cylinder, water-cooled four-stroke diesel with turbocharging and an air cooler.
Yanmar lists the dry weight without marine gear at approximately 229 kg / 505 lb. The installed propulsion package will weigh more after the selected transmission, mounts, fluids and associated equipment are included.
The standard specification lists a 12V 125A alternator. Yanmar also lists optional secondary alternator configurations, including another 12V 125A alternator or a 24V 60A alternator.
Yes. Yanmar lists the SD110 saildrive as a compatible drive for the 4JH110, alongside shaft-drive marine gear options. Confirm the exact saildrive, reduction ratio, propeller and installation configuration for the vessel before ordering.
The Yanmar 4JH110 110HP inboard diesel engine combines 110 MHP of rated output with a 2.0-liter four-cylinder common rail diesel, turbocharged and intercooled air charging, flexible mounting and a 12V 125A alternator. Review the specifications and installation requirements above, then confirm the exact marine gear, controls and accessories required for your vessel before ordering.
