Mercury FourStroke 4 HP

Power Tender and Skiffs. Effortlessly.
57 pounds of agile performance.

Specifications are subject to change without notice

Easy to Start. – Automatic decompression bleeds off cylinder pressure to reduce the pulling force required to start the engine.
Generate Power. – Convenience and performance you can count on. 4 amp alternator to charge a battery: exhaust relief holes and 6″ prop for improved handling when reversing heavy boats; even an added rectifier to power small external lights. A 5hp FourStroke that powers your boat.
Lightweight. – Weighing just 38 and 57 pounds, respectively, our 2.5 – 3.5hp and 4 – 6hp FourStroke outboards are easy to lift and carry.
Quiet. – Through-prop exhaust on all Mercury® 4 – 6hp FourStrokes exits underwater for quiet operation.
Shallow Water. – Multiple trim positions enhance performance and enable shallow-water operation.

Engine Specs

Displacement (CID/cc) : 7.5 / 123
Engine Type : 1 cylinder
Bore & Stroke (in/mm) : 2.32 x 1.77" / 59 x 45 mm
Fuel System : Carbureted
Fuel Induction System : 2-valve pushrod (overhead valve)
Cooling System : Water-cooled with thermostat
Full Throttle RPM Range : 4500-5500
Ignition System : CDI w/electronic spark advance
Starting : Manual
Gear Shift : F-N-R
Steering : Tiller
Trim Positions : 6
Shallow Water Drive : Yes
Recommended Oil : Mercury FourStroke Oil 10W-30
CARB Star Rating : 3
Exhaust System : Through prop
Alternator amp / Watt : 4 lighting / 2 charging amp / 50 lighting / 25 charging watt (Optional)
Color : Phantom Black
Dry Weight * Lightest model available : 57 lbs / 26 kg
Engine Protection Operator Warning System : Low oil pressure
Over-rev
Gearcase Options : Standard
Gearcase Ratio : 2.15:1
HP / kW : 4 / 2.9
Integral fuel tank (gal / L) : 0.3 / 1.1
Optional fuel tank (gal / L) : 3.2 / 12
Recommended Fuel : 87% octane / up to 10% ethanol
Shaft Length : 15" / 381 mm
20" / 508 mm
Shallow Water Trim Range (Degrees) : 16

Fueling Options. - Mercury® 4, 5 and 6hp FourStrokes feature integral fuel tanks with an external fuel-shutoff valve, as well as a fuel-tank cap on top of the cowl. For extended range, these engines also can be connected to a remote fuel tank placed in the boat.