Mercury FourStroke outboard motors are incredibly powerful and efficient, and they feature a wide range of applications. Crafted for less weight and high displacement, they generate abundant torque and immediate power. And because they don’t have to work as hard as heavier engines or those with lower displacement, they make boats plane faster and accelerate better, and they provide optimal fuel efficiency at cruising speed.
Made to provide outstanding acceleration and throttle response. Great for deck, inshore fishing, bass, aluminum tiller, aluminum console, runabout open bow, inflatable rigid hull, and fish & ski boats.
Photos
Highlights
Kenora, Ontario
New
MEP4934
2025
Mercury Marine®
FourStroke 90 hp
Recommended: Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
Lightest model available: 359 lbs (163 kg)
Available
Specifications
2025
Mercury Marine®
FourStroke 90 hp
Base
Four Stroke
90 HP (67 KW)
8-valve single overhead cam (SOHC) | Inline 4
2.1 L
Full: 5000-6000 RPM
Recommended: Mercury FourStroke Oil 10W-30
2.07:1 | Shift: F-N-R
CARB star rating: 3
3.5" (90 mm)
3.2" (81 mm)
Wet sump
SmartCraft ECM 70 Digital Inductive
Air induction: Performance-Tuned Scroll Intake Manifold
Big Tiller Compatible | Dual cable mechanical | Hydraulic power steering
Water-cooled with thermostat
Through prop
Maximum Trim Range: 22° (-6° to 16°) | Maximum Tilt Range: 70° (-6° to 64°) | Shallow water trim range: 20°
With water-cooled voltage regulator: 35 amp (441 watt)