Specification2025 Mercury 40 FourStroke2025 Yamaha F40FEHA
ManufacturerMercuryYamaha
Model40 FourStrokeF40FEHA
Year20252025
Horsepower40 HP40 HP
Engine Type4-stroke4-stroke
Cylinders33
Displacement710 cc762 cc
Bore × Stroke67.7 × 65.7 mm71.3 × 63.6 mm
RPM Range5,100–6,100 RPM5,200–6,000 RPM
Fuel SystemEFIEFI
Fuel TypeRegularRegular
Weight92 kg (203 lbs)83 kg (182 lbs)
Starting SystemElectricElectric
SteeringBothBoth
Shaft LengthsS/LS/L
Gear Ratio1.83:12.07:1
Alternator21 A18 A
Trim & TiltPower TiltPower Trim/Tilt
Prop Output24.76 kW23.86 kW
Recommended Boat14–19 ft14–19 ft
MSRP$8,060$7,840
Better / Advantage Lower / Disadvantage Equal / Neutral

2025 Mercury 40 FourStroke vs 2025 Yamaha F40FEHA — Which Is Better?

Choosing between the 2025 Mercury 40 FourStroke and the 2025 Yamaha F40FEHA comes down to your specific boating needs and priorities.

The 2025 Mercury 40 FourStroke (2025) is a 40hp 4-stroke outboard from Mercury, weighing 92 kg (203 lbs). Its electronic fuel injection delivers reliable starts and improved fuel economy compared to carbureted alternatives.

The 2025 Yamaha F40FEHA offers 40hp with 4-stroke technology, tipping the scales at 83 kg (182 lbs). With a larger displacement of 762 cc, it can deliver more torque at lower RPMs.

At 83 kg (182 lbs), the 2025 Yamaha F40FEHA is the lighter option — an important consideration for smaller boats, portability, and overall fuel efficiency.

Both motors are solid choices in the 40 HP class. Your final decision should factor in your boat size, typical use conditions, dealer availability in your area, and budget.