Mercury 115hp OptiMax vs Chrysler 105hp (2-Stroke)
115hp OptiMax
105hp (2-Stroke)
| Spec | Mercury 115hp OptiMax | Chrysler 105hp (2-Stroke) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 115 HP | 105 HP |
| Displacement | 1522 cc | 1582 cc ← |
| Configuration | 3 Cyl / Inline | 4 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 170 kg (375 lbs) | 113 kg (249 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.07:1 | 1.73:1 |
| Alternator | 720 W ← | 120 W |
| Fuel Delivery | DFI (Direct Injection) | Carbureted |
| Maintenance | ||
| Spark Plug | NGK IZFR6J | Champion L4J |
| Engine Oil | Mercury OptiMax/DFI Oil | TC-W3 (50:1) |
Technical Comparison Analysis
Power & Displacement
Comparing the Mercury 115hp OptiMax and Chrysler 105hp (2-Stroke) shows a displacement difference of 60cc. The Chrysler features a larger 1582cc 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 Chrysler is the lighter option at 113kg, offering a weight saving of 57kg 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 720W 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.