The Mercury F25 is one of the lightest 25HP outboards in its class, featuring a modern 526cc three-cylinder engine and smart engineering. With a weight starting at just ~60 kg (for manual-start models), this motor offers unparalleled portability for a 25HP unit. Electronic Fuel Injection (EFI) provides instant starts and optimal performance without choke, adapting well to altitude and temperature changes. The three-cylinder configuration gives the Mercury F25 strong torque and smooth operation – reduced vibration and noise compared to twin-cylinder designs. Buyers can choose between manual and electric start, and tiller steering (with up to 180° rotation for tight maneuvering) or remote control for console-equipped boats. An integrated gas-assist tilt system makes it easy to tilt the engine out of the water. Certain F25 models feature Mercury’s Command Thrust gearcase – a larger gearcase with a bigger prop that delivers greater thrust and improved handling on heavier boats. The engine includes thermostat-controlled cooling and safeguards for over-temperature and low oil pressure, ensuring reliable running during long runs. Overall, the Mercury F25 EFI offers an ideal balance of power and light weight, perfect for 4-5 meter boats that need extra muscle without adding too much weight on the transom.
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Engine hp:25 hp
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Engine type:Inline 3 cylinders
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Displacement:526 cc (L)
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Max. RPM:5000 - 6000 RPM RPM
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Alternator Amp / Watt:15A / 186W
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Fuel recommendation:Unleaded, minimum 90 RON
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Engine protection system:Oil pressure, RPM, Temperature
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Reduction gear ratio:1.92:1
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Ignition type:CDI Microcomputer
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Recommended oil:Mercury FourStroke Oil 10W-30
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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:25 L.