Yamaha F50 Midrange vs Mercury 45hp (Inline-4)
F50 Midrange
45hp (Inline-4)
| Spec | Yamaha F50 Midrange | Mercury 45hp (Inline-4) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 50 HP | 45 HP |
| Displacement | 996 cc ← | 720 cc |
| Configuration | 4 Cyl / Inline | 4 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 112 kg (247 lbs) | 72 kg (159 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 1.85:1 | 2.0 |
| Alternator | 192 W ← | 113 W |
| Fuel Delivery | EFI | Carbureted |
| Maintenance | ||
| Spark Plug | NGK DPR6EB-9 | NGK BUHW (Surface Gap) |
| Engine Oil | Yamalube 4-Stroke | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Yamaha F50 Midrange and Mercury 45hp (Inline-4) shows a displacement difference of 276cc. The Yamaha features a larger 996cc 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 72kg, offering a weight saving of 40kg 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 192W 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.