Yamaha F25 Portable EFI vs Mercury 25hp EFI (3-Cyl)
F25 Portable EFI
25hp EFI (3-Cyl)
| Spec | Yamaha F25 Portable EFI | Mercury 25hp EFI (3-Cyl) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 25 HP | 25 HP |
| Displacement | 432 cc | 526 cc ← |
| Configuration | 2 Cyl / Inline | 3 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 57 kg (126 lbs) ← | 78 kg (172 lbs) |
| Mechanical & Electrical | ||
| Gear Ratio | 2.08:1 | 1.92:1 |
| Alternator | 192 W | 210 W ← |
| Fuel Delivery | EFI | EFI |
| Maintenance | ||
| Spark Plug | NGK DPR6EB-9 | NGK DCPR6E |
| Engine Oil | Yamalube 4-Stroke | 10W-30 FC-W |
Technical Comparison Analysis
Power & Displacement
Comparing the Yamaha F25 Portable EFI and Mercury 25hp EFI (3-Cyl) shows a displacement difference of 94cc. The Mercury features a larger 526cc 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 57kg, offering a weight saving of 21kg 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 Mercury offers the best charging performance with a 210W 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.