Mercury 25hp EFI (3-Cyl) vs Mariner 25hp International (Yamaha-built 695)
25hp EFI (3-Cyl)
25hp International (Yamaha-built 695)
| Spec | Mercury 25hp EFI (3-Cyl) | Mariner 25hp International (Yamaha-built 695) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 25 HP | 25 HP |
| Displacement | 526 cc ← | 430 cc |
| Configuration | 3 Cyl / Inline | 2 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 78 kg (172 lbs) | 51 kg (112 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 1.92:1 | 1.85 |
| Alternator | 210 W ← | 84 W |
| Fuel Delivery | EFI | Carbureted |
| Maintenance | ||
| Spark Plug | NGK DCPR6E | NGK B8HS-10 |
| Engine Oil | 10W-30 FC-W | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Mercury 25hp EFI (3-Cyl) and Mariner 25hp International (Yamaha-built 695) shows a displacement difference of 96cc. 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 Mariner is the lighter option at 51kg, offering a weight saving of 27kg 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.