Mercury 25hp (2-Stroke) vs Tohatsu MFS25 EFI (3-Cyl)
25hp (2-Stroke)
MFS25 EFI (3-Cyl)
| Spec | Mercury 25hp (2-Stroke) | Tohatsu MFS25 EFI (3-Cyl) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 25 HP | 25 HP |
| Displacement | 400 cc | 500 cc ← |
| Configuration | 2 Cyl / Inline | 3 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 50 kg (110 lbs) ← | 58 kg (128 lbs) |
| Mechanical & Electrical | ||
| Gear Ratio | 1.92 | 2.17:1 |
| Alternator | 60 W | 210 W ← |
| Fuel Delivery | Carbureted | EFI |
| Maintenance | ||
| Spark Plug | NGK BP8H-N-10 | NGK DCPR6E |
| Engine Oil | TC-W3 (50:1) | 10W-30 FC-W |
Technical Comparison Analysis
Power & Displacement
Comparing the Mercury 25hp (2-Stroke) and Tohatsu MFS25 EFI (3-Cyl) shows a displacement difference of 100cc. The Tohatsu features a larger 500cc 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 50kg, offering a weight saving of 8kg 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 Tohatsu offers the best charging performance with a 210W 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.