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FourStroke 25-30hp


Mercury 25 and 30hp FourStroke outboards make light work of your biggest adventures. Quick and compact. Reliable and durable. Efficient and easy to own. FourStroke outboards bring big capabilities to small vessels.

Intuitive, Innovative Features

Exceptionally Smooth and Quiet
We balanced the powerhead to make it smoother and crafted soft-rubber mounts that isolate vibration and direct it away. Whether you’re fishing in a quiet cove or having a conversation, you’ll enjoy every minute on the water.

Easy to Maintain
Spend less time on service and more time on the water with our no-spill oil change system, easy-change gear lube and lifetime maintenance-free valve train.

Electronic Fuel Injection
Electronic fuel injection (EFI) provides surefire starts in any weather. On manual-start engines, battery-free EFI delivers efficient, reliable performance without a bulky cranking battery.

Advanced Mercury Tiller
The Mercury tiller adapts to you, not the other way around. You can reverse the grip for left- or right-handled throttling and laterally adjust the tiller angle for better leverage and control.

Available Power Tilt and Trim
Easy to stow, easy to control. Power tilt and trim, available for 25 and 30hp FourStroke outboards, lets you adjust the running attitude with the push of a CTA. A major advantage for small vessels and heavy loads.

Engine Specifications by Horsepower

Scroll within the table below to view specifications for each engine.

Horsepower 30hp 25 EFI 25hp
Engine type Inline 3 Inline 3 Inline 3
Displacement (CID/CC) 30.5 cu in (500cc) 32.1 / 526 30.5 cu in (500cc)
Displacement (L)
Cylinder Configuration
Full throttle RPM 5800-6200 5000-6000 5400-5800
Alternator amp / Watt
Starting Electric Manual 15 amp / 186 watt Electric Manual
Steering Remote Tiller Electric (turn-key) Manual Remote Tiller
Shaft length 15" / 381 mm 20" / 508 mm Remote Tiller 15" / 381 mm 20" / 508 mm
Gearcase ratio 2.17:1 15" / 381 mm 20" / 508 mm 2.17:1
Dry weight *Lightest model available 145 lbs / 65.7 kg 1.92:1 132 lbs / 60.1 kg
Trim system Gas assist Power trim and tilt 157 lbs / 71 kg 6 position ; Power trim and tilt