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Description
Specs
Standard Features
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Description

Forget everything you know about FourStroke outboards. Ours change the game. Completely. They’re tougher, smaller, and lighter than any other FourStroke on the water. With a combination of performance and efficiency that will take your time on the water to a whole new level.

FourStroke 75 - 115 hp

Embrace possibility. Adaptable, reliable, and able to outperform any outboard in its class.



Specs

Manufacturer
Mercury
Model Year
2017
Model
90 hp Command Thrust FourStroke
MSRP
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Engine

Engine Type
8-valve single overhead cam (SOHC), Inline 4
Horsepower
90 hp (67 kW)
Displacement
2.1 l
Bore x Stroke
3.5 x 3.2 (90 x 81 mm)
RPM
5,000 - 6,000 full throttle RPM
Fuel Induction
Computer controlled Multi-Port Electronic Fuel Injection (EFI)
Ignition
SmartCraft ECM 70 Digital Inductive
Starting
Smart Start Electric
Cooling
Water-cooled with thermostat
Exhaust
Through prop

Drivetrain

Gear Ratio
2.38:1 Command Thrust
Gear Shift
F-N-R

Electrical

Alternator
35A, 441W

Measurements

Shaft Length
20 in. (508 mm)
25 in. (635 mm)
Weight
363 lbs. (165 kg)

Operational

Steering
Big Tiller compatible, dual cable mechanical, Hydraulic power steering
Trim System
Power tilt, power trim
Instrumentation
SmartCraft Engine Guardian engine protection operator warning system

Other

Colors
Phantom Black

Standard Features

Lightweight & Fuel Efficient
 Mercury’s world-renowned engineering team has packed incredible power into these lighter, compact four-cylinder single-overhead-cam engines. The 115 hp weighs 20 pounds less than its closest four-stroke competitor, making it the world’s lightest low-emissions outboard in its power range.  
 Dry weight specification is for the lightest-version model. Comparative weights refer to base engines without oil, propeller or integral steering cylinder. Weights based on Owner’s Manual specifications.  
Worry-Free
 The same lifetime maintenance-free valve train found in our 150 FourStroke engines makes the 75 - 115 hp FourStroke outboards incredibly durable.  
Counter-Rotation
 Do you like to boat offshore even though you’re not in the market for a big boat? For the first time, Mercury is offering a 115 hp FourStroke with left-hand rotation. Two of these mid-range monsters on your transom provide the maneuverability and get-home safety of higher-horsepower twins at a price that’s easier on your wallet. Unlike competitive dual 115 hp engines, dual 115 Mercury FourStrokes are Command Thrust models, which swing V6-class propellers, such as Enertia series to deliver improved acceleration and better boat control in rough water.  
 Available only on 115 hp  
Bigger Footprint
 The larger Command Thrust gearcase creates a bigger footprint in the water, which provides more leverage to control your boat. The larger torpedo, combined with a bigger-diameter prop, can lift a heavy boat onto plane more easily and hold it there at lower speeds without impacting top speed.  
Quieter Than the Competition
 The Mercury 115 FourStroke is quieter than the Yamaha F115B across the rpm band.  
 At idle, the Mercury is four decibels quieter than the Yamaha – the Yamaha is 25% louder.  
 At cruising speed, where normal conversations occur, the Yamaha generates almost 15% more noise.  
 At wide-open-throttle, the Mercury is more than eight decibels quieter – the Yamaha is 50% louder.  
 Testing performed by Mercury PD&E NVH staff at a Mercury Marine hemi-anechoic chamber (Sound Lab).  
Smoother Than the Competition
 The Mercury 115 FourStroke has less vibration and rides smoother than the Yamaha F115B.  
 At forward idle, the Mercury’s vibration level at the driver’s seat is up to 50% lower than the Yamaha.  
 On the transom, the Yamaha puts out nearly five times more vibration than the Mercury – both at at a Mercury Marine test location on a 2013 Bayliner 170.  
Powerful & Efficient
 Less weight and high displacement mean Mercury’s new 75 - 115 FourStrokes generate abundant torque and immediate power. Because they don’t have to work as hard as heavier engines or those with lower displacement, these engines make boats plane faster, accelerate better and provide optimal fuel efficiency at cruising speed.  

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*Price, if shown, is Manufacturer's Suggested Retail Price (MSRP) and does not include government fees, taxes, dealer freight/preparation, dealer document preparation charges or any finance charges (if applicable). MSRP and/or final actual sales price will vary depending on options or accessories selected.
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