2YM15
The Yanmar 2YM15 is a 0.57-litre naturally aspirated two-cylinder marine diesel rated 14 mhp (10 kW) at 3600 rpm, the smallest engine of Yanmar's YM series. It is a freshwater-cooled auxiliary for small sailboats and small motorboats, sold with a KM2P-1 reverse gear for shaft drive or with a saildrive.
The 2YM15 was added to the YM series in 2005, a year after the three-cylinder 3YM20 and 3YM30, and with them replaced the GM-series auxiliaries (1GM10/2GM20/3GM30) in Yanmar's leisure range. It is a vertical, water-cooled four-stroke with swirl pre-combustion chamber (indirect injection) and an in-line injection pump, freshwater cooled through a heat exchanger. Its 70 x 74 mm bore and stroke are shared with the 3YM20.
Yanmar sells it either with the KM2P-1 mechanical cone-clutch reverse gear (ratios 2.21, 2.62 or 3.22:1) for a conventional shaft, or with a saildrive: the SD20 in earlier documentation and the SD25 in current documentation. It remains in Yanmar's catalogue, now with a 125 A alternator and certification to EPA Tier 3, RCD 2 and BSO II.
Specifications
Power
- Power
- 14 hp
- Power (kW)
- 10 kW
- Rated speed
- 3600 rpm
Engine
- Configuration
- inline 2
- Cylinders
- 2
- Displacement
- 0.57 L
- Aspiration
- naturally aspirated
- Weight
- 113 kg
- Fuel
- Diesel
- Mounting
- Inboard
Reviews
No independent reviews on file yet.
Sources
- 1. 2YM15 product page (Wayback capture Apr 2026) — Yanmar Marine International
- 2. 2YM15 datasheet DS_2YM15_A4_022021 — Yanmar Marine International
- 3. YM Series Operation Manual 0AYMM-M0002E (2025.02): 2YM15, 3YM20, 3YM30AE — Yanmar
- 4. YM Series Operation Manual 0AYMM-EN0023: 2YM15, 3YM20, 3YM30AE, 3YM30E, 3YM30 — Yanmar
- 5. YM Series Operation Manual P/N 0AYMM-G00200 (2009): 2YM15, 3YM20, 3YM30 — Yanmar Marine International (hosted by J/109 class)
- 6. Service Manual M9961-03E101 3YM30/3YM20/2YM15 (new edition March 2004, R1 April 2005) — Yanmar (hosted by J/109 class)
Specifications compiled from manufacturer sources.