Evinrude 4hp (4-Stroke) vs Yamaha F4 Portable
4hp (4-Stroke)
F4 Portable
| Spec | Evinrude 4hp (4-Stroke) | Yamaha F4 Portable |
|---|---|---|
| Power & Performance | ||
| Horsepower | 4 HP | 4 HP |
| Displacement | 138 cc | 139 cc ← |
| Configuration | 1 Cyl / Inline | 1 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 25 kg (55 lbs) ← | 27 kg (60 lbs) |
| Mechanical & Electrical | ||
| Gear Ratio | 1.65 | 2.08:1 |
| Alternator | 60 W | 0 W |
| Fuel Delivery | Carbureted | Carbureted |
| Maintenance | ||
| Spark Plug | NGK CPR6EA-9 | NGK CR6HSB |
| Engine Oil | 10W-30 Marine | Yamalube 4-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Evinrude 4hp (4-Stroke) and Yamaha F4 Portable shows a displacement difference of 1cc. The Yamaha features a larger 139cc 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 Evinrude is the lighter option at 25kg, offering a weight saving of 2kg 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 Evinrude offers the best charging performance with a 60W 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.