Yanmar 2YM15 Compact Auxiliary Marine Diesel Engine

Description

Experience quiet auxiliary motoring and zero battery anxiety with the Yanmar 2YM15 Auxiliary Engine. Displacing 0.570L across 2 vertical inline cylinders, this atmospheric diesel yields 14.0 BHP at 3,600 RPM and 12.8 BHP continuous at 3,489 RPM. Indirect fuel injection requires clean diesel fuel, and closed freshwater cooling demands anti-freeze coolant maintenance to safeguard internal passages.

A parent bore cast iron block integrates rigid main bearing webbings to absorb piston thrust forces. The single-piece cast iron cylinder head contains swirl combustion chambers and overhead valves. Electrical systems feature an isolated 12V return circuit equipped with a 1.4 kW starter and a high-output 12V 125A alternator. Dimensions span 24.1in long, 18.2in wide, and 23.6in high, weighing 249 lbs with reduction gear. Crankcase oil pan capacity holds 0.53 US gal.

Key Features of Yanmar 2YM15

Cruising sailors buy Yanmar 2YM15 auxiliary marine diesel engines to repower 24ft to 32ft cruising sailboats and sailing catamarans. Marine yards pick this twin-cylinder unit for commercial workboat diesel engine repower installations in small displacement launches.

• Mechanical indirect injection with swirl chambers produces clean combustion and low exhaust noise
• Closed freshwater heat exchanger cooling protects internal iron jackets from corrosive ocean brine
• High-output 12V 125A alternators recharge house battery banks fast during short engine runs
• Torsional vibration dampers smooth twin-cylinder power pulses before reaching propeller shafts
• Cast iron cylinder block architecture resists cylinder bore distortion under continuous cruising loads
• Flywheel housing pattern connects directly to Yanmar KM2P-1 gearboxes or SD25 saildrives
• Convenient front-mounted maintenance access points speed up impeller and fuel filter changes

Bench Dynamometer Load Test Output

Dynamometer test records confirm 14.0 BHP peak crankshaft output at 3,600 RPM and 12.8 BHP continuous output at 3,489 RPM. Closed freshwater heat exchangers stabilize engine coolant temperature at 175°F under continuous full-load motoring tests. Engine lube oil pressure maintains 45 PSI across operational engine speeds. Static engine bed inclination permits up to 15° permanent operational tilt. Crankshaft journal runout remains below 0.0004in TIR to protect main bearings against deflection fatigue. Exhaust pyrometer temperatures hold steady below 1,050°F during full power runs.

Field Operation Maintenance Service Rules

Mechanical control linkages provide positive detent action with under 2 lbs of lever resistance. Do not install this 14.0 BHP auxiliary diesel engine in heavy commercial displacement tugs, fast planing hulls, or vessels requiring high-speed towing capabilities. Operators must monitor freshwater coolant glycol levels and inspect the heat exchanger zinc anode at regular intervals.

• Drain engine oil and change spin-on oil filter cartridges every 150 operating hours
• Inspect raw water pump impellers and check heat exchanger zinc anodes every 150 hours
• Replace the primary 10-micron fuel water separator filter cartridge every 250 engine hours

Factory Warranty Shipment Parts Manifest

Yanmar Marine provides a 2-Year limited warranty backed by 3-Year major component structural coverage. The shipment crate contains the 2YM15 diesel engine core, KM2P-1 mechanical gearbox, high-output 12V 125A alternator, 1.4 kW starter motor, flexible engine mounts, B20 instrument panel, wiring harness, and factory technical manuals.