Parsun F20 (4-Stroke) vs Tohatsu M18E2 (2-Stroke)
F20 (4-Stroke)
M18E2 (2-Stroke)
| Spec | Parsun F20 (4-Stroke) | Tohatsu M18E2 (2-Stroke) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 20 HP | 18 HP |
| Displacement | 362 cc ← | 294 cc |
| Configuration | 2 Cyl / Inline | 2 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 51 kg (112 lbs) | 41 kg (90 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.08 | 1.85:1 |
| Alternator | 145 W ← | 80 W |
| Fuel Delivery | Carbureted | Carbureted |
| Maintenance | ||
| Spark Plug | NGK DPR6EA-9 | NGK B7HS-10 |
| Engine Oil | Parsun 4-Stroke Oil | TC-W3 (50:1) |
Technical Comparison Analysis
Power & Displacement
Comparing the Parsun F20 (4-Stroke) and Tohatsu M18E2 (2-Stroke) shows a displacement difference of 68cc. The Parsun features a larger 362cc 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 Tohatsu is the lighter option at 41kg, offering a weight saving of 10kg 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 4-stroke engines depends heavily on your specific boat's displacement and daily power requirements.