Yamaha 150hp V6 HPDI vs Mercury 135hp (Inline-6 Tower of Power)
150hp V6 HPDI
135hp (Inline-6 Tower of Power)
| Spec | Yamaha 150hp V6 HPDI | Mercury 135hp (Inline-6 Tower of Power) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 150 HP | 135 HP |
| Displacement | 2596 cc ← | 1635 cc |
| Configuration | 6 Cyl / V6 90° | 6 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 212 kg (467 lbs) | 135 kg (298 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.00:1 | 2.0 |
| Alternator | 648 W ← | 201 W |
| Fuel Delivery | HPDI (High Pressure Direct Injection) | Carbureted |
| Maintenance | ||
| Spark Plug | NGK BKR7HSU (Surface Gap) | NGK BUHW |
| Engine Oil | Yamalube 2-M | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Yamaha 150hp V6 HPDI and Mercury 135hp (Inline-6 Tower of Power) shows a displacement difference of 961cc. The Yamaha features a larger 2596cc 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 77kg 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 648W 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.