Yanmar 4JH57 – Marine Diesel Engine 57 HP

Description

Using common rail injection with 57 hp at 3,000 rpm, the Yanmar 4JH57 is a naturally aspirated 2.19L inline four-cylinder marine diesel engine. Its 17.0:1 compression ratio and EN 590 diesel requirement define the specified fuel-system setup. The engine supports KM35A2, KM35P, or SD60 drive arrangements, while mechanical or saildrive transmission options and electronic-control compatibility shape the documented installation configuration.

The engine weighs 485 pounds dry and uses an SAE 4 flywheel housing. A 12V, 125-amp alternator supplies the stated charging output, while enclosed forced lubrication uses 5.0L oil capacity. Heat-exchanger cooling holds 7.2L coolant, the wet mixing elbow supports the stated exhaust configuration, and listed emissions include EPA Tier 3, RCD II, and BSO II.

Key Specifications of the Yanmar 4JH57 Marine Diesel Engine

• The 2.19L inline four-cylinder engine produces 57 hp at 3,000 rpm through a naturally aspirated common rail diesel configuration.
• Common rail injection and EN 590 fuel requirements define the documented fuel-system specification for the stated 17.0:1 compression ratio.
• KM35A2, KM35P, and SD60 drive options require drivetrain compatibility review before selecting a replacement propulsion package.
• Mechanical or saildrive transmission configurations support different documented installation approaches for the specified SAE 4 flywheel housing.
• A 12V 125-amp alternator provides the stated charging output for vessels using this engine electrical-system arrangement.
• Heat-exchanger cooling, wet-exhaust mixing, and 7.2L coolant capacity define the stated marine cooling-system configuration.
• Enclosed forced lubrication uses 5.0L oil capacity for planned fluid servicing within the engine-room maintenance schedule.

Engine Configuration and Service Access

This Yanmar marine diesel engine uses an inline four-cylinder, four-stroke layout with 88 by 90 mm bore and stroke measurements. Electronic-control compatibility is specified, while the stated 1-3-4-2 firing order and 485-pound dry weight remain relevant to vessel integration and service planning.

The cooling, lubrication, exhaust, drive, and electrical systems should be assessed as one installation package. Access for common rail fuel-system service, cooling-system inspection, oil changes, and alternator wiring should be planned before engine placement.

Why Choose the Yanmar 4JH57 Marine Diesel Engine

The 4JH57 marine diesel engine combines 57 hp output with a naturally aspirated 2.19L four-cylinder platform and common rail injection. Buyers comparing propulsion packages can review its 12V 125-amp alternator, electronic-control compatibility, mechanical or saildrive options, and KM35A2, KM35P, or SD60 drive configurations. The documented EPA Tier 3, RCD II, and BSO II emissions ratings further define this engine specification.

Installation and Compatibility Considerations

Confirm that the vessel supports the 485-pound dry weight, SAE 4 flywheel housing, selected mechanical or saildrive transmission arrangement, and one of the listed KM35A2, KM35P, or SD60 drive options. Plan engine mounts, propeller or saildrive alignment, controls, fuel lines, cooling-water plumbing, wet-exhaust routing, and 12V charging connections before installation.

Use fuel meeting EN 590 requirements and provide access for the common rail fuel system, 5.0L lubrication capacity, and 7.2L cooling capacity. Verify electronic-control compatibility and follow the applicable installation, commissioning, and maintenance documentation for the completed propulsion system.

Warranty and Support

This model is eligible for Yanmar’s 3-Year Extended Limited Warranty program for first retail purchasers, subject to private and recreational use requirements. Mulmarine.com can assist with product details and order-related questions before purchase. Please review the warranty coverage and eligibility details on Mulmarine.com before purchase.

Before Ordering the Yanmar 4JH57 Marine Diesel Engine

Before ordering, verify engine-bed dimensions, mount locations, selected transmission type, SAE 4 flywheel-housing compatibility, and KM35A2, KM35P, or SD60 drive requirements. Confirm your vessel uses EN 590 diesel and has suitable provisions for fuel supply, cooling-water intake, wet exhaust, electronic controls, 12V charging wiring, ventilation, propeller or saildrive alignment, and professional installation.