Honda BF50 Midrange vs Mercury 45hp (Inline-4)
BF50 Midrange
45hp (Inline-4)
| Spec | Honda BF50 Midrange | Mercury 45hp (Inline-4) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 50 HP | 45 HP |
| Displacement | 808 cc ← | 720 cc |
| Configuration | 3 Cyl / Inline | 4 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 97 kg (214 lbs) | 72 kg (159 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.08:1 | 2.0 |
| Alternator | 264 W ← | 113 W |
| Fuel Delivery | PGM-FI | Carbureted |
| Maintenance | ||
| Spark Plug | NGK DR7EA | NGK BUHW (Surface Gap) |
| Engine Oil | 10W-30 FC-W | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Honda BF50 Midrange and Mercury 45hp (Inline-4) shows a displacement difference of 88cc. The Honda features a larger 808cc 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 25kg 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 Honda offers the best charging performance with a 264W 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.