The YANMAR 3JH40 Marine Diesel Engine 40hp is a compact inboard diesel propulsion engine developed for sailing yachts, cruising sailboats, and small displacement motorboats that require dependable marine power with efficient fuel consumption. This engine belongs to Yanmar’s JH-CR common-rail series, a modern generation of marine diesel engines designed to provide cleaner combustion, lower noise, and improved fuel efficiency.

Producing 40 horsepower (29.4 kW) at 3000 rpm, the engine uses a 3-cylinder 1.642-liter diesel configuration and electronically managed common-rail fuel injection to deliver smooth and efficient marine performance.

The 3JH40 is recognized as one of the smallest common-rail inboard marine diesel engines in displacement, size, and weight, making it suitable for vessels with compact engine compartments.

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The YANMAR 4JH80 Marine Diesel Engine 80hp is a modern inboard diesel propulsion engine designed for sailing yachts, cruising boats, and small commercial vessels that require reliable marine performance with efficient fuel consumption. Part of Yanmar’s advanced JH-CR (Common Rail) engine series, the 4JH80 integrates electronically controlled fuel injection, turbocharging technology, and compact engine architecture to deliver dependable propulsion.

Producing 80 horsepower (58.8 kW) at 3200 rpm, the engine uses a 4-cylinder 2.0-liter turbocharged diesel configuration designed to deliver strong torque, smooth operation, and efficient marine performance.

Because of its compact design and high power-to-weight ratio, the engine is widely used in sailboats, cruising vessels, and small powerboats where reliable diesel propulsion and efficient fuel consumption are essential.