Mercury 90 Hp 4 Stroke Service Manual

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Select from the topics below for information on keeping your engine running smoothly

Hints and tips to make your day on the water more enjoyable.

ManualBoating Basics

Mercury 4 stroke service repair manual 75 90 This manual in PDF format covers the four stroke models from 2000 - 2001. Covers overhauls & maintenance. All systems, fuel, electrical, cooling, controls, powerhaed power trim and tilt Open.

  1. Mercury Mariner 75HP-275HP 2-STROKE Outboards (INCLUDES JET DRIVE MODELS) Service Repair Workshop Manual (1994-1997) Mercury Mariner 4-90 HP 4-Stroke Outboards Service Repair Workshop Manual (1995-2000) Mercury Mariner 75-250 Hp 2-stroke Outboards Service Repair Workshop Manual (1998-2002).
  2. 0 - OWNERS MANUAL More info Unavailable # 90-897725: SERVICE MANUAL (1 required per assembly) 90-897725 - SERVICE MANUAL More info Unavailable # 92-883723K01: OIL, FCW Synthetic 4-Stroke, 4L, Mercury (1 required per assembly) 92-883723K01 - 92-883723K01 - OIL FC-W Syntheti More info.

Learn how to maintain and care for your Mercury outboard engine.

Mercury 90 Hp 4 Stroke Service Manual Download

Outboard Care

Learn how to maintain and care for your MerCruiser sterndrive or inboard engine.

Sterndrive and Inboard Care

Learn how to maintain and care for your Mercury diesel engine.

Diesel Engine Care

Learn about genuine Mercury parts and accessories.

Parts & Accessories

Learn how propellers can affect the performance of your boat.

Propellers

Learn how to use Mercury Joystick Piloting.

Joystick Piloting

Learn about Mercury Marine's warranty coverage and Product Protection plans.

Warranty and Mercury Product Protection

Learn how to maintain your Mercury Outboard or MerCruiser engine to prevent corrosion.

Corrosion Protection

Learn how to maintain your engine's electrical system and battery.

Electrical

Learn how to maintain your boat's fuel and fuel systems.

Fuel & Fuel Care

Learn about Mercury gauges or displays.

Gauges and Displays

Learn the importance of oils and lubricants in basic engine maintenance.

Oils & Lubricants

Learn how to take care of your engine during the off-season.

Storage and WinterizationToner
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None More Durable. Or Efficient.

Tuned for max acceleration and throttle response.

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.

90 Mercury 4 Stroke Prices

Worry-free

Service

Mercury 90 Hp Efi 4-stroke Service Manual

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.

Mercury 90 Hp 4 Stroke Service Manual Yamaha

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.

Mercury 4 Stroke Manual Free

  • 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.

Documents

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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