Mercury SeaPro 55hp vs Tohatsu MD50 TLDI (2-Stroke)
SeaPro 55hp
MD50 TLDI (2-Stroke)
| Spec | Mercury SeaPro 55hp | Tohatsu MD50 TLDI (2-Stroke) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 55 HP | 50 HP |
| Displacement | 967 cc ← | 697 cc |
| Configuration | 2 Cyl / Inline-3 | 3 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 100 kg (221 lbs) ← | 103 kg (227 lbs) |
| Mechanical & Electrical | ||
| Gear Ratio | 1.64 | 1.85:1 |
| Alternator | 210 W | 576 W ← |
| Fuel Delivery | EFI | TLDI Direct Injection |
| Maintenance | ||
| Spark Plug | NGK BP8H-N-10 | NGK IZFR6Q |
| Engine Oil | Tohatsu TLDI Oil | |
Technical Comparison Analysis
Power & Displacement
Comparing the Mercury SeaPro 55hp and Tohatsu MD50 TLDI (2-Stroke) shows a displacement difference of 270cc. The Mercury features a larger 967cc 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 100kg, offering a weight saving of 3kg 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 Tohatsu offers the best charging performance with a 576W 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.