Mercury 80hp (3-Cyl 2-Stroke) vs Johnson 75hp (2-Stroke)
80hp (3-Cyl 2-Stroke)
75hp (2-Stroke)
| Spec | Mercury 80hp (3-Cyl 2-Stroke) | Johnson 75hp (2-Stroke) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 80 HP | 75 HP |
| Displacement | 1165 cc ← | 814 cc |
| Configuration | 3 Cyl / Inline | 3 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 131 kg (289 lbs) | 102 kg (225 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.33:1 | 2.42 |
| Alternator | 113 W ← | 84 W |
| Fuel Delivery | Carbureted | Carbureted |
| Maintenance | ||
| Spark Plug | NGK BUHW-2 | Champion QL77JC4 |
| Engine Oil | TC-W3 2-Stroke | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Mercury 80hp (3-Cyl 2-Stroke) and Johnson 75hp (2-Stroke) shows a displacement difference of 351cc. The Mercury features a larger 1165cc 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 Johnson is the lighter option at 102kg, offering a weight saving of 29kg 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 Mercury offers the best charging performance with a 113W 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.