Johnson 140hp Crossflow V4 vs Mercury 135hp (Inline-6 Tower of Power)
140hp Crossflow V4
135hp (Inline-6 Tower of Power)
| Spec | Johnson 140hp Crossflow V4 | Mercury 135hp (Inline-6 Tower of Power) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 140 HP | 135 HP |
| Displacement | 1632 cc | 1635 cc ← |
| Configuration | 4 Cyl / V4 90° | 6 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 138 kg (304 lbs) | 135 kg (298 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.00:1 | 2.0 |
| Alternator | 441 W ← | 201 W |
| Fuel Delivery | Twin Carbureted | Carbureted |
| Maintenance | ||
| Spark Plug | Champion QL77JC4 | NGK BUHW |
| Engine Oil | TC-W3 2-Stroke | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Johnson 140hp Crossflow V4 and Mercury 135hp (Inline-6 Tower of Power) shows a displacement difference of 3cc. The Mercury features a larger 1635cc 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 3kg 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 Johnson offers the best charging performance with a 441W 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.