Honda BF100 PGM-FI vs Mercury 90hp (Inline-6 Tower of Power)
BF100 PGM-FI
90hp (Inline-6 Tower of Power)
| Spec | Honda BF100 PGM-FI | Mercury 90hp (Inline-6 Tower of Power) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 100 HP | 90 HP |
| Displacement | 1496 cc | 1500 cc ← |
| Configuration | 4 Cyl / Inline | 6 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 163 kg (359 lbs) | 125 kg (276 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.33:1 | 2.0 |
| Alternator | 633 W ← | 201 W |
| Fuel Delivery | PGM-FI | Carbureted |
| Maintenance | ||
| Spark Plug | NGK IZFR6K-11E | NGK BUHW |
| Engine Oil | Honda 10W-30 | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Honda BF100 PGM-FI and Mercury 90hp (Inline-6 Tower of Power) shows a displacement difference of 4cc. The Mercury features a larger 1500cc 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 125kg, offering a weight saving of 38kg 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 633W 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.