Yanmar 4JH4E Marine Inboard Diesel Engine 55HP
$18,088.00
- Description
Description
Yanmar 4JH4E Marine Inboard Diesel Engine 55HP
The Yanmar 4JH4E 55HP marine inboard diesel engine combines 55 metric horsepower (40.5 kW) at 3,000 rpm under ISO 3046 conditions with a 2.19-litre, four-cylinder platform. Direct injection, natural aspiration and freshwater cooling make it a candidate for recreational sailboats, displacement craft and marine engine repower projects. simplicity-marine.com
Looking for a Yanmar 4JH4E 55HP engine for sale? Request a quotation from MSS Motorsports UG covering engine condition, the required gearbox or drive arrangement, included equipment and delivery to your destination.
Naturally Aspirated Propulsion for Cruising Boats
The Yanmar 4JH4E 55HP is a four-stroke marine diesel with direct fuel injection and a naturally aspirated air intake. Its original documentation describes remote controls connected by cables to the engine control lever and marine gearbox. Engines
Key features include:
- 2.19-litre displacement: Four cylinders with an 88 × 90 mm bore and stroke.
- Direct injection: Manufacturer-specified diesel combustion system.
- Freshwater heat-exchanger cooling: A coolant circuit with seawater heat rejection.
- 12V electric starting: Published starter specification of 1.4 kW.
- 200 kg dry engine weight: Excludes the gearbox, fluids and installation accessories. simplicity-marine.com
For a yacht repower, assess the engine against the hull’s power requirement, cruising profile and available installation space. Propeller demand, gearbox ratio and the condition of retained components also affect suitability.
Technical Specifications
| Specification | Manufacturer-Published Details |
|---|---|
| Engine model | Yanmar 4JH4E |
| Maximum crankshaft output, ISO 3046 | 40.5 kW / approximately 55 MHP at 3,000 rpm |
| Maximum crankshaft output, ISO 8665 | 39.6 kW / approximately 54 MHP at 3,000 rpm |
| Published continuous crankshaft rating | 36.8 kW / 50 MHP at 2,907 rpm |
| Engine configuration | Four-cylinder, four-stroke diesel |
| Displacement | 2.190 litres |
| Bore × stroke | 88 × 90 mm |
| Combustion system | Direct injection |
| Aspiration | Naturally aspirated |
| Cooling | Freshwater circuit with heat exchanger |
| Starting system | 12V electric starter, 1.4 kW |
| Original alternator specification | 12V / 60A, with an 80A option |
| Dry weight without gearbox | 200 kg |
| Intended use in operation manual | Recreational craft |
Specifications are drawn from Yanmar’s original 4JH4E brochure and operation manual. Confirm the fitted electrical equipment and accessories for the particular engine offered. simplicity-marine.com
Why 55HP and 54HP Specifications Both Appear
MHP means metric horsepower. Yanmar’s original brochure lists 40.5 kW, approximately 55 MHP, at a fuel-inlet temperature of 25°C under ISO 3046-1. It separately lists 39.6 kW, approximately 54 MHP, at a 40°C fuel-inlet temperature under ISO 8665. simplicity-marine.com
Use the same rating conditions when comparing listings. The published 50 MHP continuous rating at 2,907 rpm is a separate operating point and should be read alongside the manufacturer’s recreational operating instructions. Engines
For reference data, review the Yanmar 4JH4E factory brochure, preserved in a marine supplier’s archive.
Gearbox and Drive Configuration
Yanmar’s JH-series technical reference lists KM35P, KM35A2, KM4A1 and ZF30M shaft-drive gearbox arrangements for the 4JH4E. The selected transmission, reduction ratio and output coupling must suit the engine and vessel. JHシリーズ｜ボートライフを始めよう｜マリンプレジャー｜ヤンマー
For a saildrive project, confirm the exact engine version, drive model and connection equipment. Package contents and installation arrangements should be identified in the quotation.
Explore the Yanmar JH marine engine range to compare other models and outputs.
Plan Your Replacement Engine Package
Before finalising a Yanmar 4JH4E 55HP repower, ask your installer to check engine-bed dimensions, shaft alignment, propeller loading, exhaust height, seawater supply and maintenance access.
Photographs of the existing engine and gearbox identification plates help establish the current configuration. Include available engine-room measurements and details of the instruments and controls you intend to retain.
Confirm Condition, Inclusions and Warranty
A useful Yanmar 4JH4E 55HP price should define the complete supply scope. Request written confirmation of:
- Engine condition, serial number and operating hours where applicable.
- Available service history, rebuild documentation and running-test evidence.
- Gearbox or drive model, reduction ratio and included controls.
- Instruments, wiring, mounts, exhaust components and other accessories supplied.
- Warranty provider, coverage and commissioning requirements.
- Availability, packing, dispatch estimate and delivery charges.
Warranty eligibility depends on the particular engine and supply arrangement. Obtain the applicable terms before ordering.
Frequently Asked Questions
Is the Yanmar 4JH4E 55HP turbocharged?
Yanmar specifies natural aspiration for this model. Engines
Does the 200 kg dry weight include a gearbox?
No. The original brochure identifies 200 kg as the dry engine weight without marine gear. simplicity-marine.com
Does the engine include a gearbox and warranty?
These depend on the offered package and engine condition. Request an itemised quotation and written warranty terms.
Request Your Yanmar 4JH4E Quote
Contact MSS Motorsports UG for a Yanmar 4JH4E quotation with your vessel make and model, existing engine, gearbox or drive model, reduction ratio, intended operating profile and purchase timing. Include your billing and delivery addresses to request equipment pricing and transport costs for your destination.
