Years of collaboration with top boat designers has influenced the Yamaha 425 HP Outboard from the ground up to provide the ultimate in power and efficiency offshore.
With impressive stats such as the highest compression ratio on the water, industry firsts such as an electric steering system, and engineering touches such as iridium spark plugs and quad thermostats, it’s purpose-built for extreme power, durability, control and reliability.
Specifications:
|
Engine Type |
V8 / DOHC / 32 valves / 4 Valves per Cylinder |
|
Displacement |
5.6L |
|
Bore x Stroke |
96 x 96 mm (3.78 x 3.78 in) |
|
Prop Shaft Horsepower |
425hp at 5500 RPM |
|
Full Throttle RPM Range |
5000 – 6000 RPM |
|
Alternator Output at W.O.T. |
90 Amp Gross, Max |
|
Compression Ratio |
12.2:1 |
|
Fuel Induction System |
Direct Injection / Up to 2900 PSI |
|
Weight* |
432 kg (952 lbs) / 443 kg (977 lbs) / 453 kg (999 lbs) |
|
Recommended Fuel |
Octane 89 |
|
Recommended Engine Oil |
Yamalube® 4M |
|
Recommended Fuel Filtration |
Yamaha 10-Micron Fuel / Water Separating Filter (external) |