| Manufacturer / Brand | Lombardini Marine (Kohler Engines) |
| Model Designation | LDW502SD Compact Saildrive Package |
| Engine Type | 4-Stroke Ultra-Compact Marine Diesel |
| Cylinder Configuration | Inline-2 |
| Total Displacement | 0.5 Liter (31 cu in) |
| Bore x Stroke | 72.0 x 62.0 mm (2.83 x 2.44 in) |
| Aspiration & Charge Air | Naturally Aspirated |
| Cooling System Architecture | Tubular Heat Exchanger Closed Circuit with Raw Seawater Saildrive Leg Ingestion |
| Continuous Power Rating (P1) | 11 BHP (8 kW) @ 3,300 RPM |
| Maximum / Intermittent Power (P3/P4) | 13 BHP (9.5 kW) @ 3,600 RPM |
| Fuel Injection Platform | Mechanical Unit Pump Injector System (FOCS Unit Injector in Cylinder Head) with Mechanical Governor |
| Cylinder Head Metallurgy | Cast Iron Engine Block with Aluminum Alloy Cylinder Head and Overhead Camshaft (OHC) |
| Cylinder Liners | Cast Iron Engine Block with Integrated Parent Bores |
| Flywheel Housing & Flywheel | Dedicated FOCS Saildrive Intermediate Housing and Flexible Damper |
| Electrical System & Ground | 12V Negative Ground Marine Electrical System |
| Starter & Alternator Output | 12V 1.0 kW Electric Starter / 12V 40A Marine Alternator |
| Lube Oil Sump Capacity | 1.4 Liters (0.37 US gal) |
| Engine Coolant Capacity | 2.5 Liters (0.66 US gal) |
| Dry Weight (excl. gearbox) | 66 kg (146 lbs) |
| Overall Dimensions (L x W x H) | 435 x 445 x 480 mm (17.1 x 17.5 x 18.9 in) |
| Emissions Certification | RCD 2 (Directive 2013/53/EU) / EPA Tier 3 Marine / EU Stage V |
| Fuel Compatibility | Ultra-Low Sulfur Diesel (ULSD No. 2), Automotive Diesel (EN 590), B7 Biodiesel |
| Transmission / Outdrive Compatibility | Packaged with Lombardini S-Drive (Technodrive Twin Disc SeaProp 60) Saildrive Lower Unit and Hull Gasket Bed |
| Factory Warranty Period | Lombardini Kohler 2-Year Limited Marine Manufacturer Warranty |
| Application Research | Small sailing yachts (20-27 ft), daysailers, coastal pocket cruisers, and micro catamarans requiring lightweight, compact auxiliary saildrive propulsion. |
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