Yanmar 3YM20 Marine Diesel Engine 21hp

DescriptionYanmar 3YM20 Marine Diesel Engine 21HP for Sale – Compact Inboard Propulsion EngineThe Yanmar 3YM20 marine diesel engine is a compact, fuel-efficient, and highly reliable 21HP inboard propulsion engine designed for sailboats and small to mid-size marine vessels. As part of the advanced YM Series, this three-cylinder engine delivers smooth operation, low vibration, and excellent fuel economy, making it ideal for auxiliary and primary propulsion applications.At Coastal Wave Marine, we supply the Yanmar 3YM20 marine diesel engine for sale with competitive pricing, verified quality, and worldwide shipping, offering a dependable solution for marine operators seeking durability, efficiency, and long service life.Key Features & Benefits21HP output for reliable propulsion and auxiliary powerThree-cylinder design for smoother and quieter operationCompact and lightweight construction for flexible installationFuel-efficient diesel engine with reduced emissionsFreshwater cooling system with heat exchanger for durabilityDesigned for long-lasting performance in marine environmentsEasy maintenance with accessible service componentsGearbox Type & Drive ConfigurationThe Yanmar 3YM20 is configured with a straight shaft drive system, making it ideal for sailboat auxiliary propulsion and displacement hull vessels. This Marine gearbox type ensures efficient power transfer, smooth operation, and compatibility with standard marine transmission systems, making it a reliable choice for compact inboard diesel engine installations.Technical Specifications TableTechnical SpecificationValueConfiguration4-stroke vertical, water-cooled diesel engineMaximum output at crankshaft15.3 kW (21 hp) @ 3600 rpmContinuous rating output at crankshaft14.0 kW (19 hp) @ 3400 rpmBore × Stroke70 mm × 74 mmNumber of cylinders3Combustion systemIndirect injectionAspirationNatural aspirationStarting systemElectric starting 12VLubrication systemEnclosed, forced lubricating systemDirection of rotation (crankshaft)Counter-clockwise viewed from sternEngine mountingRubber-type flexibleDisplacement0.854 LCooling systemFreshwater cooling with heat exchangerApplicationSailboats, small vessels, auxiliary and propulsionApplicationsThe Yanmar 3YM20 marine diesel engine for sale is widely used in sailboats, small yachts, and displacement vessels requiring reliable auxiliary or primary propulsion. Its compact design and efficient performance make it one of the best Yanmar marine diesel engines for small to mid-size boats and cruising applications.Why Buy from Coastal Wave MarineCoastal Wave Marine is a trusted global supplier of Yanmar marine diesel engines, serving customers across the USA, Europe, the Middle East, and international markets. We provide inspected and verified engines, competitive pricing, expert technical support, and reliable export logistics.We specialize in supplying Yanmar marine engines for sale with worldwide shipping, ensuring a smooth and secure purchasing experience for both individual buyers and commercial clients.Warranty & Quality AssuranceEvery engine supplied by Coastal Wave Marine is carefully inspected to meet professional marine standards. Optional warranty coverage may be available depending on stock and supply conditions. Our commitment is to deliver reliable marine engines that meet the expectations of both commercial and recreational users.Shipping & AvailabilityThe Yanmar 3YM20 marine diesel engine is available for sale subject to stock. We provide fast worldwide shipping, secure export packaging, and full documentation to ensure safe and efficient international delivery.FAQQ: Is the Yanmar 3YM20 suitable for sailboats?A: Yes, it is designed for sailboats and small vessels requiring reliable auxiliary or propulsion power.Q: Can I buy the Yanmar 3YM20 marine diesel engine with international shipping?A: Yes, Coastal Wave Marine offers worldwide delivery and export support.Q: What gearbox type is used with the Yanmar 3YM20?A: It is typically paired with a straight shaft drive configuration for efficient propulsion.Q: How can I get the price and availability?A: Contact us directly to request a quote and confirm current stock.Request Price & AvailabilityIf you are looking to buy the Yanmar 3YM20 marine diesel engine for sale with fast international shipping, Coastal Wave Marine is your trusted supplier offering competitive pricing, verified engines, and reliable global export services. Whether you need a compact 21HP Yanmar inboard propulsion engine for a sailboat or small yacht, a dependable marine diesel engine supplier, or a global exporter with immediate availability, our team is ready to assist. Contact Coastal Wave Marine today to request a quote, check stock availability, confirm gearbox compatibility, and arrange secure worldwide delivery tailored to your requirements.