Selva Dorado 20 vs Mercury 18hp (2-Stroke)
Dorado 20
18hp (2-Stroke)
| Spec | Selva Dorado 20 | Mercury 18hp (2-Stroke) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 20 HP | 18 HP |
| Displacement | 498 cc ← | 300 cc |
| Configuration | 2 Cyl / Inline | 2 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 74 kg (163 lbs) | 39 kg (86 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 1.86 | 2.0 |
| Alternator | 145 W ← | 60 W |
| Fuel Delivery | Carbureted | Carbureted |
| Maintenance | ||
| Spark Plug | NGK DPR6EA-9 | NGK B7HS |
| Engine Oil | Selva Marine 4-Stroke | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Selva Dorado 20 and Mercury 18hp (2-Stroke) shows a displacement difference of 198cc. The Selva features a larger 498cc block, which typically provides superior low-end torque and better hole-shot performance when pushing heavy loads or reaching planning speeds.
Weight & Rigging
In terms of transom weight, the Mercury is the lighter option at 39kg, offering a weight saving of 35kg over its competitor. This weight reduction is critical for smaller hulls or boats with limited transom capacity where every kilogram affects the center of gravity and drainage efficiency.
Electrical & Features
For boats equipped with modern electronics, sonar, and shallow-water anchors, the Selva offers the best charging performance with a 145W alternator. Choosing the right power-to-weight profile between these two 4-stroke engines depends heavily on your specific boat's displacement and daily power requirements.