Yanmar 4CHE3 78 HP Marine Propulsion Engines Rating M
Original price was: $9,988.00.$8,988.00Current price is: $8,988.00.
- Description
Description
Yanmar 4CHE3 78HP Marine Propulsion Engine — M Rating
The Yanmar 4CHE3 78HP marine propulsion engine offers a 4.33-litre, four-cylinder diesel platform with natural aspiration, direct injection and mechanical engine control. Yanmar specifies 57.4kW / 78 metric horsepower at 2,550rpm under the M rating, giving buyers a clear starting point for commercial vessel repower planning. yanmar.com
Contact MSS Motorsports UG for a quotation covering the selected engine, gearbox configuration and supplied equipment. Whether replacing an existing installation or specifying a propulsion package, compare the complete project requirements alongside the engine price.
Practical Engineering for Working Vessels
- Mechanical engine control: A conventional control arrangement for buyers seeking a mechanically managed marine diesel.
- Naturally aspirated design: The 4CHE3 operates without a turbocharger, keeping turbocharger maintenance outside the engine’s service requirements.
- Robust core construction: Yanmar describes the CH family’s wave-ribbed monoblock cylinder block, forged carbon-steel crankshaft and connecting rods as central structural features.
- Heat-exchanger cooling: Freshwater engine cooling transfers heat through a seawater-cooled heat exchanger.
- Hydraulic marine transmission: The manufacturer’s reference arrangement pairs the engine with a Yanmar wet-clutch marine gearbox. yanmar.com
These features provide a useful basis for evaluating a Yanmar commercial marine diesel engine for a fishing boat, workboat or other vessel with suitable propulsion requirements.
Understand the 78HP M Rating
The 78HP specification is the M-rated version. Yanmar separately lists an L-rated output of 62.5kW / 85MHP at 2,600rpm.
Choose the operating classification according to the vessel’s workload, time at high load and expected annual hours. M-rated power remains subject to the applicable duty limits; confirm those limits against the supplied engine’s documentation before planning prolonged full-load operation. yanmar.com
Technical Specifications
| Specification | Manufacturer reference |
|---|---|
| Engine model | Yanmar 4CHE3 |
| Engine type | Four-stroke, vertical, water-cooled diesel |
| M-rated output | 57.4kW / 78MHP |
| M-rated speed | 2,550rpm |
| Cylinder arrangement | Four cylinders in line |
| Displacement | 4.330 litres |
| Bore × stroke | 105 × 125mm |
| Combustion system | Direct injection |
| Engine control | Mechanical |
| Aspiration | Naturally aspirated |
| Cooling system | Heat exchanger |
| Starting system | 24V electric |
| Reference marine gear | Yanmar YX-30-2, hydraulic wet multi-disc clutch |
| Reference package dry mass | 570kg including marine gear |
| Reference dimensions, L × W × H | 1,258 × 688 × 1,022mm with YX-30-2 gear |
MHP denotes metric horsepower. Weight and dimensions describe the referenced engine-and-gearbox package; verify the selected configuration and installation drawing before ordering. yanmar.com
Consult the official Yanmar CHE Series specifications for manufacturer reference information.
Match the Gearbox to Your Vessel
For a Yanmar 4CHE3 78HP engine and gearbox package, confirm the exact transmission model and reduction ratio. Yanmar’s YX-30-2 reference specifications include forward ratios of 2.03, 2.55, 2.96 and 3.48; the ratio fitted to the offered unit must be identified. yanmar.com
Provide your existing gearbox model, ratio, shaft details and available propeller specifications. Your installer should assess compatibility, shaft alignment and propeller loading before recommending that existing drivetrain components be reused.
Commercial Marine Repower Planning
For fishing vessels and working boats, begin with loaded displacement, hull type, normal cruising speed and the working schedule. Assess engine-bed dimensions, service access, exhaust routing, cooling connections and electrical requirements as part of the installation scope.
For projects requiring substantially higher output, compare the Yanmar 6CH-HTE3 170HP M-rated marine engine. Its installation and propulsion requirements need a separate assessment.
Get a Clearly Specified Quotation
When comparing a Yanmar 4CHE3 78HP for sale, request an itemised offer identifying:
- Engine condition, serial number and documented operating hours where available.
- Gearbox model, ratio and whether it is included.
- Control panel, wiring, controls, mounts and coupling.
- Available maintenance records, inspection findings and testing evidence.
- Warranty provider, coverage, exclusions and claim procedure.
- Packing, transport costs and estimated dispatch timing.
For used or reconditioned equipment, establish the scope of any repair work and the testing completed. Confirm availability and included accessories in writing so the quotation reflects the equipment you intend to purchase.
Frequently Asked Questions
Is the Yanmar 4CHE3 78HP turbocharged?
No. Yanmar specifies a naturally aspirated configuration for this model.
Does the quoted engine include a gearbox?
Inclusion depends on the offer. Confirm the transmission model, reduction ratio, condition and accessories in the quotation.
Is the published 570kg weight for the engine alone?
No. It is the manufacturer’s reference dry mass including marine gear.
Does it include a manufacturer warranty?
Warranty eligibility depends on the specific engine and supply arrangement. Request written terms before ordering.
Request Your Yanmar 4CHE3 78HP Quote
Contact MSS Motorsports UG for a Yanmar 4CHE3 quotation with your vessel details, current engine, gearbox model and ratio, intended duty, annual operating hours and purchase timing. Include your billing and delivery addresses to request equipment pricing and transport costs.
