Mercury 20hp (2-Stroke) vs Parsun F20 (4-Stroke)
20hp (2-Stroke)
F20 (4-Stroke)
| Spec | Mercury 20hp (2-Stroke) | Parsun F20 (4-Stroke) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 20 HP | 20 HP |
| Displacement | 400 cc ← | 362 cc |
| Configuration | 2 Cyl / Inline | 2 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 48 kg (106 lbs) ← | 51 kg (112 lbs) |
| Mechanical & Electrical | ||
| Gear Ratio | 2.0 | 2.08 |
| Alternator | 60 W | 145 W ← |
| Fuel Delivery | Carbureted | Carbureted |
| Maintenance | ||
| Spark Plug | NGK BP8H-N-10 | NGK DPR6EA-9 |
| Engine Oil | TC-W3 2-Stroke | Parsun 4-Stroke Oil |
Technical Comparison Analysis
Power & Displacement
Comparing the Mercury 20hp (2-Stroke) and Parsun F20 (4-Stroke) shows a displacement difference of 38cc. The Mercury features a larger 400cc 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 48kg, offering a weight saving of 3kg 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 Parsun offers the best charging performance with a 145W alternator. Choosing the right power-to-weight profile between these two 2-stroke engines depends heavily on your specific boat's displacement and daily power requirements.