VETUS M4.56 52HP Marine Diesel Propulsion Engine

Mid-size cruising sloops maintain dependable auxiliary motoring speeds with a VETUS M4.56 auxiliary diesel, which burns EN 590 diesel through an indirect-injection 1.758L 4-cylinder block, producing 52 HP and 110 Amps at 423 lbs.

1.758L block delivers 52 continuous horsepower
110-Amp alternator charges domestic battery banks
Top-cover cooling plate lowers bilge heat
423-lb dry weight reduces stern settling

$2,916.90

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Category: Inboard Marine Engines Brand: Vetus SKU: M4.56

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At 52 HP and 3000 RPM, the VETUS M4.56 is an inline four-cylinder, four-stroke vertical marine diesel engine with 1.758 L displacement. This naturally aspirated engine uses indirect fuel injection with a mechanical governor pump system and specifies marine diesel meeting EN 590 or ASTM D975 No. 2-D. Its indirect fresh-water cooling loop, intercooled top-cover plate, and raw-water heat exchanger define the stated cooling arrangement.

The listed dry weight is 192 kg, while the 12V, 110-amp alternator supports the charging system. This engine has an M-Line analogue dashboard wiring-harness interface, and NMEA 2000 availability is specified through an external VETUS gateway. The provided application information identifies auxiliary inboard propulsion use for 22 to 36 foot hulls, including cruising sailboats, sloops, catamarans, canal boats, and traditional wooden day-boats.

Why Choose the VETUS M4.56 Marine Diesel Propulsion Engine

The M4.56 marine diesel propulsion engine combines 52 HP at 3000 RPM with a 1.758 L inline four-cylinder arrangement and naturally aspirated induction. Buyers can compare its 192 kg listed dry weight, 110-amp alternator, indirect fresh-water cooling, analogue dashboard interface, and external-gateway NMEA 2000 option against other inboard engines. The stated application range covers auxiliary propulsion installations on specified 22 to 36 foot hulls.

Warranty and Support

VETUS provides its 5 PLUS engine warranty program, consisting of 36 months of coverage for material and construction defects for eligible non-commercial pleasure-craft use, plus a subsequent 24-month limited coverage period for specified engine parts, subject to applicable operating-hour limits and warranty conditions. can assist with product details and order-related questions before purchase. Please review the warranty coverage and eligibility details on before purchase.

Before Ordering the VETUS M4.56 Marine Diesel Propulsion Engine

Verify that your vessel supports the 192 kg dry weight, 52 HP at 3000 RPM output, 1.758 L inline four-cylinder configuration, and indirect cooling layout. You should confirm the planned transmission and shaft arrangement, raw-water and fresh-water hose routes, exhaust routing, 12V charging connections, dashboard-harness requirements, and whether your installation requires the external VETUS NMEA 2000 gateway.

Product Specifications