Twin Mercury 500HP Engines With Headers

FOR SALE Twin Mercury 500HP Engines With Headers. Come fully rigged with polished stainless-steel exhaust headers to maximize flow and performance

For high-performance center consoles, the 500R offers an alternative 500 HP setup, though this comes as a supercharged V8 rather than an inboard.

This legendary naturally-aspirated V8 package (often branded as the HP500) relies on multi-port electronic fuel injection (EFI) and features tubular headers for maximum breathing.

• Engine Type: Supercharged 64-degree DOHC V8
• Displacement: 4.6L (281 cid)
• Horsepower: 500 HP
• Full-Throttle RPM Range: 6,000 – 6,600 RPM
• Exhaust: Through-prop
• Fuel Requirements: Minimum 89 Octane
• Dry Weight: ∼726 lbs.