DescriptionNew Yanmar 3YM20 Marine Inboard Diesel Engine 21HP For SaleThe Yanmar 3YM20 Marine Inboard Diesel Engine 21HP is a compact and efficient propulsion solution designed for sailboats, cruising vessels, and repower projects that require dependable auxiliary power with modern fuel efficiency. If you are researching current Yanmar 3YM20 price, this model remains a popular choice for vessel owners seeking smooth performance, lower emissions, and long-term reliability.As part of Yanmar’s modern YM Series lineup, this yanmar diesel engine was developed as an upgrade over older small displacement engines by offering quieter operation, improved serviceability, and better fuel efficiency. The Yanmar 3YM20 for sale market continues to attract buyers looking for dependable Yanmar Inboard Engines for sailing applications and smaller cruising vessels.Key Features of Yanmar 3YM20 Marine Inboard Diesel EngineReliable 21HP output for auxiliary propulsionThree-cylinder configuration for smoother operationFreshwater cooling system with heat exchangerCompact engine design for easier installationMechanical controls for simplified servicingLower vibration and quieter operationFor boat owners seeking dependable yanmar boat engines, the 3YM20 remains a practical solution for modern sailboats and compact cruising vessels.Gearbox CompatibilityThis engine can be paired with compatible Yanmar Gearboxes or the SD25 saildrive depending on your vessel configuration. Our team helps match the proper reduction ratio and propulsion setup to ensure efficient power transfer and reliable long-term performance.Technical SpecificationsTechnical SpecificationValueEngine ModelYanmar 3YM20Engine Type4-stroke vertical water-cooled diesel engineMaximum Output21HP (15.3 kW)Rated Speed3600 RPMNumber of Cylinders3Displacement0.854 LBore x Stroke70 mm x 74 mmCombustion SystemIndirect InjectionAspirationNaturally AspiratedAlternator12V – 80AStarting SystemElectric StartCooling SystemFreshwater cooling with heat exchangerEngine ManagementMechanicalDry WeightApprox. 110 kgDimensions613 mm x 463 mm x 600 mmCertificationsEPA Tier 3, RCD 2, BSO II, EMCApplicationSailboats and compact cruising vesselsDrive ConfigurationShaft drive / SD25 saildrive compatibleThese specifications align with published YM Series technical data.Standard Manufacturer Accessories IncludedAll engines we supply are brand-new bobtail engines and include standard manufacturer accessories such as engine documentation, owner manuals, standard wiring components, factory supplied accessories, flexible mounts, and other manufacturer standard components.Engine AvailabilityWe maintain inventory through our in-house stock and network of authorized dealers, allowing us to source available units efficiently for customers worldwide. Availability may vary depending on current demand.Warranty CoverageAll new yanmar diesel marine engines include standard manufacturer warranty coverage. Eligible engines may also qualify for extended warranty options depending on usage requirements and maintenance compliance. We also assist customers with warranty registration support.Global Shipping and DeliveryWe ship internationally through our logistics network and authorized dealers with secure export packaging and documentation. Shipping options may include EXW, CIF, and CFR depending on your preferred delivery terms. Once your purchase is completed, processing begins immediately, while final delivery timelines depend on your destination.Frequently Asked QuestionsIs the Yanmar 3YM20 available?Yes, available units can be sourced through our stock and authorized dealer network.Is this a new engine?Yes, all engines we supply are brand-new units unless otherwise stated.Does it come with a gearbox?This is supplied as a bobtail engine, but we can match it with compatible Yanmar Gearboxes or SD25 saildrive systems if required.Do you ship internationally?Yes, we ship globally with proper export documentation and freight coordination.How fast can the engine be delivered?Processing begins once your purchase is completed, while final delivery timelines depend on your destination.Request Yanmar 3YM20 QuoteContact our team to request a quote for the Yanmar 3YM20 Marine Inboard Diesel Engine 21HP. We supply new engines, global shipping, warranty support, and complete propulsion solutions when required.
