Yamaha F20 Portable vs Chrysler 20hp (2-Stroke)
F20 Portable
20hp (2-Stroke)
| Spec | Yamaha F20 Portable | Chrysler 20hp (2-Stroke) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 20 HP | 20 HP |
| Displacement | 432 cc ← | 327 cc |
| Configuration | 2 Cyl / Inline | 2 Cyl / Inline |
| Weights & Dimensions | ||
| Dry Weight | 56 kg (123 lbs) ← | 59 kg (130 lbs) |
| Mechanical & Electrical | ||
| Gear Ratio | 2.08:1 | 2.0 |
| Alternator | 192 W ← | 113 W |
| Fuel Delivery | EFI | Carbureted |
| Maintenance | ||
| Spark Plug | NGK DPR6EA-9 | Champion L77JC4 |
| Engine Oil | 10W-30 FC-W | TC-W3 2-Stroke |
Technical Comparison Analysis
Power & Displacement
Comparing the Yamaha F20 Portable and Chrysler 20hp (2-Stroke) shows a displacement difference of 105cc. The Yamaha features a larger 432cc 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 Yamaha is the lighter option at 56kg, offering a weight saving of 3kg 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 Yamaha offers the best charging performance with a 192W 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.