Tohatsu MD40 TLDI (2-Stroke) vs Johnson 40hp (4-Stroke)
MD40 TLDI (2-Stroke)
40hp (4-Stroke)
| Spec | Tohatsu MD40 TLDI (2-Stroke) | Johnson 40hp (4-Stroke) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 40 HP | 40 HP |
| Displacement | 697 cc | 815 cc ← |
| Configuration | 3 Cyl / Inline | 3 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 100 kg (221 lbs) ← | 109 kg (240 lbs) |
| Mechanical & Electrical | ||
| Gear Ratio | 1.85:1 | 2.27:1 |
| Alternator | 576 W ← | 216 W |
| Fuel Delivery | TLDI Direct Injection | EFI |
| Maintenance | ||
| Spark Plug | NGK IZFR6Q | NGK DCPR7E |
| Engine Oil | Tohatsu TLDI Oil | 10W-40 FC-W |
Technical Comparison Analysis
Power & Displacement
Comparing the Tohatsu MD40 TLDI (2-Stroke) and Johnson 40hp (4-Stroke) shows a displacement difference of 118cc. The Johnson features a larger 815cc 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 Tohatsu is the lighter option at 100kg, offering a weight saving of 9kg 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.