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Yanmar 1GM10 – Marine Diesel Engine 9 HP
Yanmar 1GM10 – 9 HP utilizes a robust single-cylinder 4-stroke propulsion design, serving as the industry standard for ultra-lightweight and compact auxiliary power. This 0.3L unit features a simple, seawater-cooled architecture and mechanical direct injection, offering the rugged reliability and easy maintenance required for small day-sailers and wooden clinker boats where engine room space is critically limited.
- Precision Operational Data: Rated at 9 HP (6.7 kW) at 3600 RPM.
- Internal Engine Configuration Type: Single Cylinder, 4-Stroke 0.318L Displacement.
- Advanced Fuel Delivery System: Mechanical Direct Injection for maximum simplicity.
- Recommended Vessel Application Use: Engineered for small day-sailers, small fishing boats, and auxiliary use.
- Factory Protection Service Plan: Yanmar global manufacturer warranty.
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Description
Yanmar 1GM10 9 HP – Compact Sailboat Auxiliary Diesel
Managing weight distribution in small-displacement sailboats is the primary mechanical challenge addressed by the Yanmar 1GM10 series. This ultra-lightweight, single-cylinder engine delivers a reliable 9 HP at 3600 RPM, providing essential propulsion for coastal cruisers where engine room real estate is at a premium. Its simple, naturally aspirated design reduces complex failure points, making it a favorite for American sailors seeking a dependable repower solution for classic 20-30 foot vessels.
Adhering to stringent EPA Tier 3 standards for small compression-ignition engines, the 1GM10 ensures clean operation in environmentally sensitive USA coastal waters. The seawater cooling system is engineered for simplicity and longevity, while the hand-start capability provides an emergency failsafe for offshore safety. With its low fuel consumption rate of approximately 0.5 gallons per hour at cruising speed, this engine optimizes operational costs for the budget-conscious American cruiser.
Core Technical Specifications
- Maximum Output: 9 HP at 3600 RPM.
- Displacement: 19.4 cubic inches (0.318 Liters).
- Configuration: 1-cylinder, 4-stroke, vertical water-cooled diesel.
- Aspiration: Natural aspiration for mechanical simplicity.
- Dry Weight: Approximately 168 lbs with KM2P-1 gearbox.
- Charging: 12V / 40A alternator included.
- Starting System: Electric start with manual hand-start backup.
- Bore and Stroke: 2.95 x 2.83 inches.
Yanmar 1GM10 Full Specs
| Engine type | 1-Cylinder, 4-stroke, Vertical Water Cooled Diesel |
| Displacement | 0.318L (19 cid) |
| Bore x stroke | 75 x 72 mm |
| Horsepower | 9 hp (6.7 kW) |
| Rated rpm | 3600 rpm |
| Aspiration | Naturally Aspirated |
| Compression ratio | 23.0:1 |
| Fuel system | Direct Injection |
| Recommended fuel | Diesel (ISO 8217 DMA) |
| Ignition/Firing Order | Compression / 1 |
| Alternator | 12V, 35 Amp |
| Gear ratio/Drive | KM2P (various ratios) |
| Transmission | Mechanical Cone Clutch |
| Dry weight | 76 kg (168 lbs) |
| Flywheel housing | N/A (Integrated) |
| Steering | Mechanical |
| Coolant capacity | 1.3L |
| Exhaust system | Mixing elbow (Wet type) |
| Cooling system | Direct Sea Water Cooling |
| Lubrication | Forced lubrication with trochoid pump |
| Oil capacity | 1.3L |
| Emissions rating | Compliant with RCD I |
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