Johnson 300hp V8 Looper vs Mercury 275hp Verado (L6)
300hp V8 Looper
275hp Verado (L6)
| Spec | Johnson 300hp V8 Looper | Mercury 275hp Verado (L6) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 300 HP | 275 HP |
| Displacement | 4000 cc ← | 2598 cc |
| Configuration | 8 Cyl / V8 90° | 6 Cyl / Inline 6 Supercharged |
| Weights & Dimensions | ||
| Dry Weight | 260 kg (573 lbs) ← | 288 kg (635 lbs) |
| Mechanical & Electrical | ||
| Gear Ratio | 1.86 | 1.85:1 |
| Alternator | 441 W | 1008 W ← |
| Fuel Delivery | Carbureted | EFI + Supercharger |
| Maintenance | ||
| Spark Plug | Champion QL78YC | NGK ILFR6G-E |
| Engine Oil | VRO Injection | Mercury 25W-40 Synthetic |
Technical Comparison Analysis
Power & Displacement
Comparing the Johnson 300hp V8 Looper and Mercury 275hp Verado (L6) shows a displacement difference of 1402cc. The Johnson features a larger 4000cc 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 260kg, offering a weight saving of 28kg 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 1008W 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.