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.
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