Mercury 85hp (Inline-4) vs Yamaha F80 (Early 4-Stroke)
85hp (Inline-4)
F80 (Early 4-Stroke)
| Spec | Mercury 85hp (Inline-4) | Yamaha F80 (Early 4-Stroke) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 85 HP | 80 HP |
| Displacement | 1090 cc | 1596 cc ← |
| Configuration | 4 Cyl / Inline | 4 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 95 kg (209 lbs) ← | 168 kg (370 lbs) |
| Mechanical & Electrical | ||
| Gear Ratio | 2.3 | 2.31 |
| Alternator | 201 W | 288 W ← |
| Fuel Delivery | Carbureted | EFI |
| Maintenance | ||
| Spark Plug | NGK BUHW (Surface Gap) | NGK LFR6A-11 |
| Engine Oil | TC-W3 2-Stroke | Yamalube 4-M |
Technical Comparison Analysis
Power & Displacement
Comparing the Mercury 85hp (Inline-4) and Yamaha F80 (Early 4-Stroke) shows a displacement difference of 506cc. The Yamaha features a larger 1596cc 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 95kg, offering a weight saving of 73kg 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 288W alternator. Choosing the right power-to-weight profile between these two 2-stroke engines depends heavily on your specific boat's displacement and daily power requirements.