Mariner 40hp International (Yamaha-built 6E9) vs Johnson 40hp (4-Stroke)
40hp International (Yamaha-built 6E9)
40hp (4-Stroke)
| Spec | Mariner 40hp International (Yamaha-built 6E9) | Johnson 40hp (4-Stroke) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 40 HP | 40 HP |
| Displacement | 669 cc | 815 cc ← |
| Configuration | 2 Cyl / Inline | 3 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 68 kg (150 lbs) ← | 109 kg (240 lbs) |
| Mechanical & Electrical | ||
| Gear Ratio | 1.85 | 2.27:1 |
| Alternator | 126 W | 216 W ← |
| Fuel Delivery | Carbureted | EFI |
| Maintenance | ||
| Spark Plug | NGK B8HS | NGK DCPR7E |
| Engine Oil | TC-W3 2-Stroke | 10W-40 FC-W |
Technical Comparison Analysis
Power & Displacement
Comparing the Mariner 40hp International (Yamaha-built 6E9) and Johnson 40hp (4-Stroke) shows a displacement difference of 146cc. The Johnson features a larger 815cc 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 Mariner is the lighter option at 68kg, offering a weight saving of 41kg 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 216W 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.