Yamaha V8 5.6L 425 hp 2020
Power & Performance Yamaha V8 5.6L 425 hp 2020
- Industry’s First Direct-Fuel-Injection Four Stroke: Maximizes power and efficiency by spraying fuel at high pressure directly into the combustion chamber. It’s the first four-stroke powerhead in the outboard industry to feature direct injection.
- Exclusive Fuel System: A three-stage low-medium-high pressure fuel pump system works, in part, due to two independent, rpm-activated fuel pumps in the Vapor Separator Tank. This unique five-pump system creates an unprecedented fuel injection pressure of up to 2900 PSI to further maximize atomization and efficiency.
- In-Bank Exhaust: Intake tracks enter the cylinder head from the outside of the powerhead. This gives exhaust gases room for a direct route to the lower unit and out through the propeller hub, streamlining the powerhead and improving flow.
- XTO OS Propellers: With diameters from 16 to 17 1/8 inches and increased blade surface, XTO propellers complement the torque potential of our V8 XTO Offshore. They also contribute to greater thrust overall, including up to 300 percent more reverse thrust than the Yamaha F350.
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*: 443 kg (977 lbs)
- Recommended Fuel: Octane 89
- Recommended Engine Oil: Yamalube 4M (See owner’s manual)
- Recommended Fuel Filtration: Yamaha 10-Micron Fuel / Water Separating Filter (external)
- C.A.R.B. Rating: 3-Star
- Exhaust: Through Propeller (Except in Reverse Under 2500 RPM)
- Intake: 32
- Ignition: TCI Microcomputer
- Spark Plug: ILMAR7E-9 / Iridium
- Alternator Output: 90 Amps Gross, Max
- Starting System: Electric w/ PTT
- Lubrication: Wet Sump
- Engine Oil Capacity: 7.8L / 8.2 Quarts; 7.5L / 7.9 Quarts
- Recommended Cooling: Thermostatic Control
- Ethanol Blend Limit: 10% Maximum
- Gear Ratio: (25/14) 1.79
- Gear Shift: Forward, Neutral, Reverse
- Shaft Length: 30″
- Degree of Tilt: -4° through +73°
- Degree of Trim: -4° through +16°
- Dry Weight: 443 kg (977 lbs)
- Mounting Centers: 28.5″
- Steering: Integrated, Electric Actuation
- Steering Angle (maximum): 31° from center, either direction
- Warranty: Limited 5-Year Pleasure, 3-Year Government, 1-Year Commercial
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