Mariner 8hp International (Yamaha-built 6G1) vs McCulloch 7.5hp Scott-Built
8hp International (Yamaha-built 6G1)
7.5hp Scott-Built
| Spec | Mariner 8hp International (Yamaha-built 6G1) | McCulloch 7.5hp Scott-Built |
|---|---|---|
| Power & Performance | ||
| Horsepower | 8 HP | 7.5 HP |
| Displacement | 165 cc ← | 164 cc |
| Configuration | 2 Cyl / Inline | 2 Cyl / Inline-2 |
| Weights & Dimensions | ||
| Dry Weight | 27 kg (60 lbs) | 26 kg (57 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.08 | 1.65 |
| Alternator | 60 W | 0 W |
| Fuel Delivery | Carbureted | Carbureted |
| Maintenance | ||
| Spark Plug | NGK B7HS | Champion J6C |
| Engine Oil | TC-W3 2-Stroke | |
Technical Comparison Analysis
Power & Displacement
Comparing the Mariner 8hp International (Yamaha-built 6G1) and McCulloch 7.5hp Scott-Built shows a displacement difference of 1cc. The Mariner features a larger 165cc 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 McCulloch is the lighter option at 26kg, offering a weight saving of 1kg 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 Mariner offers the best charging performance with a 60W 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.