Honda BF135 vs Mercury 125hp (Inline-6 Tower of Power)
BF135
125hp (Inline-6 Tower of Power)
| Spec | Honda BF135 | Mercury 125hp (Inline-6 Tower of Power) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 135 HP | 125 HP |
| Displacement | 2354 cc ← | 1635 cc |
| Configuration | 4 Cyl / Inline | 6 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 217 kg (478 lbs) | 135 kg (298 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.14:1 | 2.0 |
| Alternator | 612 W ← | 201 W |
| Fuel Delivery | PGM-FI | Carbureted |
| Maintenance | ||
| Spark Plug | NGK IZFR6K11 | NGK BUHW |
| Engine Oil | 10W-30 FC-W | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Honda BF135 and Mercury 125hp (Inline-6 Tower of Power) shows a displacement difference of 719cc. The Honda features a larger 2354cc 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 135kg, offering a weight saving of 82kg 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 612W 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.