The Mercury F20 is a 20HP four-stroke outboard that provides serious thrust for medium-sized boats and RIBs. Featuring Electronic Fuel Injection (EFI), the F20 precisely meters fuel for maximum output and minimal consumption. Its two-cylinder 333cc powerhead and refined intake system give the Mercury 20HP an excellent power-to-weight ratio – evident in the strong acceleration and responsive handling on the water. The engine idles quietly and runs smoothly across the RPM range; Mercury’s Adaptive Speed Control helps maintain engine RPM under varying load for consistent performance (a feature typically found in larger Mercury models, now benefiting the 20HP class). Buyers can choose manual or electric start and tiller or remote steering, making the F20 adaptable to many boat types. Weighing roughly 45–47 kg (depending on configuration), it remains one of the lightest 20HP outboards for easy installation and portability. A 12A alternator comes standard to keep batteries charged. The F-N-R gearbox allows easy shifting, and the through-prop exhaust contributes to quieter operation. Built with durability in mind, the Mercury F20 has a robust gearcase and corrosion-resistant finish to withstand heavy use. This outboard is a top choice for anglers and recreational boaters who need 20 horsepower of dependable Mercury performance in a compact, efficient package.
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Engine hp:20 hp
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Engine type:Inline 2 cylinders
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Displacement:333 cc (L)
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Max. RPM:5700 - 6200 RPM RPM
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Alternator Amp / Watt:12A / 145W
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Fuel recommendation:Unleaded regular, minimum 87 octane (R+M/2) or 90 RON, maximum 10% ethanol
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Engine protection system:Oil pressure, RPM, Temperature
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Reduction gear ratio:2.15:1
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Ignition type:CDI Microcomputer
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Recommended oil:Mercury FourStroke Oil 10W-30
25W-40 Synthetic Blend
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Fuel system:EFI
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Cooling system:Water cooling + thermostat
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Gears:F-N-R
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Exhaust system:Through the propeller
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Propeller:Yes
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Fuel tank:12 L.