New/Used: 
Manufacturer: 
Powerhouse Marine Logo

518 LOGAN STREET
LA CROSSE, WI 608-784-9580

Service CSI
Need Help?
Email David Tucker.



2012 Mercury 4.0 Fourstroke Outboard

call for price

About the 2012 Mercury 4.0 Fourstroke Outboard

Easy and Breezy

It sounds like an oxymoron: a feature-heavy, lightweight outboard. But to run one ofMercury’s 4, 5 or 6 hp FourStroke outboards is to believe in the seemingly impossible. These engines feature six trim positions and a standard shallow-water drive that delivers boaters the performance and maneuverability needed in any boating situation. Automatic decompression bleeds off compression during start-up, requiring less pulling force to start the engine. While running, exclusive Mercury through-prop exhaust, as opposed to the “over-the-prop” design used by competitors, promotes a more comfortable and quieter ride. All this comes in a package that, at just 55 lbs., is the lightest in its class*. Don’t call it a miracle—just call it aMercury.

Spec/Capacity

Engine Configuration:Single Outboard
Engine Description:Mercury 40 Fourstroke Outboard
Total or Max HP:4
Hours:0
Fuel:Gasoline

4 FourStroke Specifications

HP/Kw @ Prop 4 / 2.9
Full throttle RPM 4500-5500
Cylinder Configuration 1
Displacement (CID / CC) 7.5 / 123
Bore and Stroke (in / mm) 2.32 x 1.77in
59 x 45mm
Fuel Induction System 2-valve pushrod (overhead valve)
Ignition CDI w/electronic spark advance
Fuel System Carbureted
Alternator Amp 4 lighting / 2 charging amp / 50 lighting / 25 charging watt (Optional)
Cooling System Water-cooled with thermostat
Starting Manual
Gearcase Ratio 2.15:1
Gear Shift F-N-R
Steering Tiller
Trim Positions 6
Exhaust System Though prop
Shallow water drive Yes
Shallow water trim range (degrees) 16
Recommended Oil Mercury 4-Stroke Outboard Oil
Recommended Fuel 87 octane/up to 10% ethanol
Integral fuel tank (gal / L) 0.3 / 1.0
Optional fuel tank (gal / L) 3.2 / 12
Engine Protection Operator Warning System Low oil pressure
Over-rev
Shaft Length 15 in (381mm)
Shaft Length 20 in (508 mm)
Dry Weight * Lightest model available 57lbs / 26kg
CARB Star Rating 3