Mercury 2.5hp FourStroke vs Yamaha F2.5 Portable
2.5hp FourStroke
F2.5 Portable
| Spec | Mercury 2.5hp FourStroke | Yamaha F2.5 Portable |
|---|---|---|
| Power & Performance | ||
| Horsepower | 2.5 HP | 2.5 HP |
| Displacement | 85 cc ← | 72 cc |
| Configuration | 1 Cyl / Inline | 1 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 17 kg (37 lbs) | 17 kg (37 lbs) |
| Mechanical & Electrical | ||
| Gear Ratio | 2.15:1 | 2.01:1 |
| Alternator | 0 W | 0 W |
| Fuel Delivery | Carbureted | Carbureted |
| Maintenance | ||
| Spark Plug | NGK DCPR6E | NGK BR6HS |
| Engine Oil | 10W-30 FC-W | 10W-30 FC-W |
Technical Comparison Analysis
Power & Displacement
Comparing the Mercury 2.5hp FourStroke and Yamaha F2.5 Portable shows a displacement difference of 13cc. The Mercury features a larger 85cc 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 Yamaha is the lighter option at 17kg, offering a weight saving of 0kg 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 Yamaha offers the best charging performance with a 0W 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.