Mercury 90 Hp 4 Stroke Service Manual

None More Durable. Or Efficient.

Tuned for max acceleration and throttle response.

Mercury 90 Hp 4 Stroke Service Manual

Lightweight & Fuel Efficient

Mercury’s world-renowned engineering team has packed incredible power into these lighter, compact four-cylinder single-overhead-cam engines. The 115hp 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.

Watch these step-by-step maintenance videos created to help you care for your Mercury engine. Mercury Verado and Pro FourStroke; Mercury 75hp, 90hp, 115hp FourStroke; Mercury 150hp FourStroke; Mercury MerCruiser 4.5L; Mercury MerCruiser 6.2L; Mercury MerCruiser 8.2L. MERCURY DOWNLOAD 2001 2002 Service Manual 115 HP 115HP EFI 4 Stroke Download Now; 1987-1993 Mercury Outboard 70 75 80 90 100 115HP 2-Stroke 3 Cylinder Service Repair Manual (Free Preview) Download Now; Mercury/Mariner 115HP EFI (4 Stroke) Service Manual Download Now; Mercury Repair Manual 1965 - 1989 40 115HP 2 Stroke Download Now. Mercury 75/90/115HP 4-stroke Operation and maintenance manual PDF, ENG, 2.54 MB.pdf Download Mercury 75/90/115HP OptiMax Operation and maintenance manual PDF, RUS, 8.21 MB.pdf. Mercury 4-Stroke Outboard Boat Motor Service Manuals. 225 HP Models 175 HP Models 150 HP Models 135 HP Models 115 HP Models 90 HP Models 75 HP Models 60 HP Models. Mercury Outboard Service Manual - PDF CD Book - Mercury Outboard Repair Manual - PDF / CD / Book - Efi - Verado - OptiMax - Seloc 2005-11 4-stroke 2001-14 2 stroke 1995-04 4 stroke 1990-00 2 stroke 1965-89 2 stroke Table of Contents PDF file 2.5 hp - 4 hp - 5 hp - 8 hp - 15 hp - 25 hp - 40 hp - 50 hp - 75 hp - 90 hp - 115 hp - 150 hp.

Worry-free

The same lifetime maintenance-free valvetrain design found in our 150 FourStroke engines makes the 75-115hp 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 115hp 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 115hp 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 a competitive 115hp four-stroke across the rpm band.

  • At idle, the Mercury is four decibels quieter than the competition – the competitive outboard is 25% louder.
  • At cruising speed, where normal conversations occur, the competitive outboard generates almost 15% more noise.
  • At wide-open-throttle, the Mercury is more than eight decibels quieter – the competitive outboard 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 a competitive 115hp four-stroke.

  • At forward idle, the Mercury's vibration level at the driver’s seat is up to 50% lower than the competitive outboard.
  • On the transom, the competitive outboard puts out nearly five times more vibration than the Mercury – both at cruise and at full throttle.
Testing performed by Mercury PD&E NVH staff 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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Take a deeper dive into what makes Mercury outboards stand apart with detailed information on each motor and the features that make them unique.

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Customers are confident when they buy Mercury®. An investment in unmatched quality, durability, and performance. Browse our engine test data to check out the numbers behind the name.

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Mercury 90 Hp 4 Stroke Service Manual Transfer Switch

Frequently Asked Questions on products, warranty, storage and maintenance.

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Mercury Joystick Piloting - the system that allows you to effortlessly move your Mercury-powered boat in any direction with the push of a joystick. It takes the stress out of docking and maneuvering in tight spaces and less-than-ideal environments. Check out these how-to videos to learn more about this awesome technology.

Watch these step-by-step maintenance videos created to help you care for your Mercury engine.

A Material Safety Data Sheet (MSDS) is a form containing data regarding the properties of a particular substance. It is intended to provide workers and emergency personnel with procedures for handling or working with that substance in a safe manner.

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Need an Owner’s Manual for your Mercury Engine to perform maintenance, replace parts or just learn more about your engine? Mercury has made it easy for you to receive a free printed copy or to download and print your own copy. To order a printed version of the Service Manual for your particular Mercury Outboard or MerCruiser Engine, click here.

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