Yamaha F4 Portable vs Mariner 4hp (2-Stroke)
F4 Portable
4hp (2-Stroke)
| Spec | Yamaha F4 Portable | Mariner 4hp (2-Stroke) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 4 HP | 4 HP |
| Displacement | 139 cc ← | 83 cc |
| Configuration | 1 Cyl / Inline | 1 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 27 kg (60 lbs) | 20 kg (44 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 2.08:1 | 2.0 |
| Alternator | 0 W | 0 W |
| Fuel Delivery | Carbureted | Carbureted |
| Maintenance | ||
| Spark Plug | NGK CR6HSB | NGK B7HS |
| Engine Oil | Yamalube 4-Stroke | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Yamaha F4 Portable and Mariner 4hp (2-Stroke) shows a displacement difference of 56cc. 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 Mariner is the lighter option at 20kg, offering a weight saving of 7kg 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 Mariner offers the best charging performance with a 0W 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.