Tohatsu MFS100 (4-2-1 Exhaust) vs Mercury 90hp (Inline-6 Tower of Power)
MFS100 (4-2-1 Exhaust)
90hp (Inline-6 Tower of Power)
| Spec | Tohatsu MFS100 (4-2-1 Exhaust) | Mercury 90hp (Inline-6 Tower of Power) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 100 HP | 90 HP |
| Displacement | 1995 cc ← | 1500 cc |
| Configuration | 4 Cyl / Inline | 6 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 178 kg (392 lbs) | 125 kg (276 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.08:1 | 2.0 |
| Alternator | 516 W ← | 201 W |
| Fuel Delivery | EFI | Carbureted |
| Maintenance | ||
| Spark Plug | NGK LFR6A-11 | NGK BUHW |
| Engine Oil | Tohatsu 4-Stroke Oil | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Tohatsu MFS100 (4-2-1 Exhaust) and Mercury 90hp (Inline-6 Tower of Power) shows a displacement difference of 495cc. The Tohatsu features a larger 1995cc 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 125kg, offering a weight saving of 53kg 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 516W alternator. Choosing the right power-to-weight profile between these two 4-stroke engines depends heavily on your specific boat's displacement and daily power requirements.