Tohatsu MFS140A (4-2-1 Exhaust) vs Mercury 135hp (Inline-6 Tower of Power)
MFS140A (4-2-1 Exhaust)
135hp (Inline-6 Tower of Power)
| Spec | Tohatsu MFS140A (4-2-1 Exhaust) | Mercury 135hp (Inline-6 Tower of Power) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 140 HP | 135 HP |
| Displacement | 1995 cc ← | 1635 cc |
| Configuration | 4 Cyl / Inline | 6 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 178 kg (392 lbs) | 135 kg (298 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.08:1 | 2.0 |
| Alternator | 492 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 MFS140A (4-2-1 Exhaust) and Mercury 135hp (Inline-6 Tower of Power) shows a displacement difference of 360cc. 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 135kg, offering a weight saving of 43kg 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 492W 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.