Mariner 9.9hp International (Yamaha-built 682) vs Mercury 9.8hp (2-Stroke)
9.9hp International (Yamaha-built 682)
9.8hp (2-Stroke)
| Spec | Mariner 9.9hp International (Yamaha-built 682) | Mercury 9.8hp (2-Stroke) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 9.9 HP | 9.8 HP |
| Displacement | 246 cc ← | 179 cc |
| Configuration | 2 Cyl / Inline | 2 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 34 kg (75 lbs) | 24 kg (53 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.08 | 2.0 |
| Alternator | 80 W ← | 60 W |
| Fuel Delivery | Carbureted | Carbureted |
| Maintenance | ||
| Spark Plug | NGK B7HS | NGK B8HS |
| Engine Oil | TC-W3 2-Stroke | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Mariner 9.9hp International (Yamaha-built 682) and Mercury 9.8hp (2-Stroke) shows a displacement difference of 67cc. The Mariner features a larger 246cc 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 24kg, offering a weight saving of 10kg 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 80W 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.