RELIABLE COMPACT PROPULSION

The Yanmar 3YM20 marine diesel engine is engineered for small to medium-sized yachts, sailboats, and workboats where efficient, dependable thrust is fundamental. Its three-cylinder, four-stroke design delivers trusted performance with low vibration and proven durability in marine environments.

BALANCED POWER DELIVERY

Rated at approximately 21 mhp (15.3 kW) @ 3600 rpm, the 3YM20 balances accessible power with smooth torque delivery, making it well-suited to auxiliary propulsion duties and everyday cruising tasks. Its naturally aspirated combustion system with in-line fuel pump emphasises consistent performance and ease of operation.

MARINE-OPTIMISED DESIGN

Purpose-built for the marine environment, the 3YM20 features freshwater cooling with a heat exchanger, a robust alternator (12 V, 125 A), and mechanical controls that prioritise reliability over unnecessary complexity. Its compact footprint and moderate dry weight support flexible installation in tight engine compartments.

ECONOMIC OPERATING PROFILE

Optimised for fuel economy and low lifecycle costs, the 3YM20 represents an efficient propulsion choice for operators seeking dependability, reasonable consumption, and enduring performance.

COMPLIANCE AND EFFICIENCY

The engine meets key emissions standards, including RCD, BSO II, EMC, and EPA Tier 3, delivering a cleaner run without compromising power output.