Mercury 75 User Manual
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Mercury 75 User Manual

75/90/115 efi 4-stroke
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See also: Service Manual , Operation & Maintenance Manual
Welcome Aboard!
Proper care and maintenance is an important part in keeping your Mercury Product operating at peak
efficiency for maximum performance and economy. The enclosed Owner's Registration Card is your key
to trouble-free family fun. Refer to your Operation and Maintenance Manual for full details of your warranty
coverage.
Details of your nearest dealer can be found on www.marinepower.com where country maps and full
contact information are displayed.
Is your engine properly registered for warranty purpose? Please check on www.marinepower.com. If
necessary, please contact your local dealer.
If the outboard motor's serial number plate contains the CE mark in the lower left-hand corner, the
following statement applies:
This outboard motor manufactured by Mercury Marine, Fond du Lac, WI, USA or Marine Power Europe
Inc. Park Industrel, de Petit-Rechain, Belgium complies with the requirements of the following directives
and standards, as amended:
Recreational Craft Directive: 94/25/EC; std. ISO 8665, ISO 11547
Machinery Directive:
EMC Directive:
Patrick C. Mackey
President, Mercury Marine, Fond du Lac, WI USA
European Regulations Contact:
Product Environmental Engineering Department, Mercury Marine, Fond du Lac, WI USA
98/37/EC,
89/336/EC; std. EN50081-1, SAE J551 (CISPR Pub. 12),
EN 50082-1, IEC 61000 PT4-2, IEC 61000 PT4-3
i

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Summary of Contents for Mercury 75

  • Page 1 Welcome Aboard! Proper care and maintenance is an important part in keeping your Mercury Product operating at peak efficiency for maximum performance and economy. The enclosed Owner's Registration Card is your key to trouble-free family fun. Refer to your Operation and Maintenance Manual for full details of your warranty coverage.

  • Page 2: Table Of Contents

    Warranty Registration Outside The United States And Canada................1 Mercury Marine Two Years Limited Warranty (Europe)..................2 Mercury Marine One Year Limited Warranty (Confederation of Independent States, Middle-East, Africa).... 3 3 Year Limited Warranty Against Corrosion......................5 Warranty Coverage And Exclusions........................6 GENERAL INFORMATION Boater's Responsibilities............................
  • Page 3 Steering Link Rod Fasteners..........................41 Corrosion Control Anode............................41 Propeller Replacement............................43 Spark Plug Inspection and Replacement......................45 Fuse Replacement - 75/90 4-Stroke Models......................46 Fuse Replacement - 115 4-Stroke Models......................47 Timing Belt Inspection............................47 Battery Inspection ..............................48 Lubrication Points..............................
  • Page 4 Engine Will Not Start............................55 Engine Runs Erratically............................55 Performance Loss..............................56 Battery Will Not Hold Charge..........................56 OWNER SERVICE ASSISTANCE Local Repair Service............................57 Service Away From Home............................ 57 Parts And Accessories Inquiries........................... 57 Service Assistance............................... 57 Mercury Marine Service Offices........................... 57...

  • Page 5: Warranty Information

    Warranty Registration United States And Canada You may change your address at any time, including at time of warranty claim, by calling Mercury Marine or sending a letter or fax with your name, old address, new address, and engine serial number to Mercury Marine’s warranty registration department.

  • Page 6: Mercury Marine Two Years Limited Warranty (Europe)

    Mercury dealer authorized to service the product. If purchaser cannot deliver the product to such a dealer, written notice must be given to Mercury. We will then arrange for the inspection and any covered repair. Purchaser in that case shall pay for all related transportation charges and/or travel time. If the service provided is not covered by this warranty, purchaser shall pay for all related labor and material, and any other expenses associated with that service.

  • Page 7: Mercury Marine One Year Limited Warranty (Confederation Of Independent States, Middle-East, Africa)

    No individual or entity, including Mercury Marine authorized dealers, has been given authority by Mercury Marine to make any affirmation, representation or warranty regarding the product, other than those contained in this limited warranty, and if made, shall not be enforceable against Mercury Marine.
  • Page 8 Mercury dealer authorized to service the product. If purchaser cannot deliver the product to such a dealer, written notice must be given to Mercury. We will then arrange for the inspection and any covered repair. Purchaser in that case shall pay for all related transportation charges and/or travel time. If the service provided is not covered by this warranty, purchaser shall pay for all related laborand material, and any other expenses associated with that service.

  • Page 9: Year Limited Warranty Against Corrosion

    Mercury dealer authorized to service the product. If purchaser cannot deliver the product to such a dealer, written notice must be given to Mercury. We will then arrange for the inspection and any covered repair. Purchaser in that case shall pay for all related transportation charges and/or travel time. If the service provided is not covered by this warranty, purchaser shall pay for all related labor and material, and any other expenses associated with that service.

  • Page 10: Warranty Coverage And Exclusions

    Mercury Precision Parts or Quicksilver MerCathode system and/or Galvanic Isolator. Corrosion damage caused by improper application of copper base anti-fouling paints is also not covered by this limited warranty.
  • Page 11 Use of other than Mercury Precision or Quicksilver parts when making warranty repairs. Oils, lubricants or fluids changed as a matter of normal maintenance is customer's responsibility unless loss or contamination of same is caused by product failure that would be eligible for warranty consideration.

  • Page 12: General Information

    GENERAL INFORMATION Boater's Responsibilities The operator (driver) is responsible for the correct and safe operation of the boat and safety of its occupants and general public. It is strongly recommended that each operator (driver) read and understand this entire manual before operating the outboard.

  • Page 13: High-Speed And High-Performance Boat Operation

    For additional information, obtain a copy of our Hi-Performance Boat Operation booklet (part number 90-849250--1) from your dealer, distributor, or Mercury Marine. ob00307 Outboard Remote Control Models The remote control connected to your outboard must be equipped with a start in neutral only protection device.

  • Page 14: Lanyard Stop Switch

    GENERAL INFORMATION WARNING Disengagement of a steering link rod can result in the boat taking a full, sudden, sharp turn. This potentially violent action can cause occupants to be thrown overboard exposing them to serious injury or death. ob00655 Self-locking nuts Lanyard Stop Switch The purpose of a lanyard stop switch is to turn off the engine when the operator moves far enough away from the operator's position (as in accidental ejection from the operator's position) to activate the switch.

  • Page 15: Protecting People In The Water

    GENERAL INFORMATION While activation of the lanyard stop switch will stop the engine immediately, a boat will continue to coast for some distance depending upon the velocity and degree of any turn at shut down. However, the boat will not complete a full circle.

  • Page 16: Passenger Safety Message - Pontoon Boats And Deck Boats

    GENERAL INFORMATION Passenger Safety Message - Pontoon Boats And Deck Boats Whenever the boat is in motion, observe the location of all passengers. Do not allow any passengers to stand or use seats other than those designated for traveling faster than idle speed. A sudden reduction in boat speed, such as plunging into a large wave or wake, a sudden throttle reduction, or a sharp change of boat direction, could throw them over the front of boat.

  • Page 17: Impact With Underwater Hazards

    GENERAL INFORMATION ob00314 The primary concern is the boat changing direction while in the midst of the jump. In such case the landing may cause the boat to veer violently in a new direction. Such a sharp change in direction can cause occupants to be thrown out of their seats, or out of the boat.

  • Page 18: Safety Instructions For Hand Tilled Outboards

    GENERAL INFORMATION • A rapid reduction in speed. This will cause occupants to be thrown forward, or even out of the boat. • Impact damage to the outboard and/or boat. Keep in mind, the most important thing you can do to help reduce injury or impact damage during an impact is control the boat speed.

  • Page 19: Selecting Accessories For Your Outboard

    Some accessories not manufactured or sold by Mercury Marine are not designed to be safely used with your outboard or outboard operating system. Acquire and read the installation, operation, and maintenance manuals for all your selected accessories.

  • Page 20: Recording Serial Number

    It is important to record this number for future reference. The serial number is located on the outboard as shown. rial Numb XXXXXXXX XXXX XXXX RP M ob00656 Serial number Year manufactured Model year Certified Europe Insignia (as applicable) Model designation 75/90/115 EFI 4-Stroke Specifications - International Models 115 EFI Horsepower...
  • Page 21 GENERAL INFORMATION Models 115 EFI Kilowatts 55.9 67.1 85.8 Full Throttle RPM Range 4500-5500 5000-6000 Idle Speed in Neutral Gear 850 ± 25 RPM 750 ± 50 RPM Number of Cylinders Piston Displacement 1596 cc (97.4 cid) 1741 cc (106.2 cid) Cylinder Bore 79 mm (3.110 in.) Stroke...

  • Page 22: Component Identification

    GENERAL INFORMATION Component Identification ob00657 Top cowl Trim tab Bottom cowl Auxiliary tilt switch Water pump indicator hole Transom brackets Driveshaft housing Gearcase Anti-ventilation plate Cooling water intake holes...

  • Page 23: Installation

    INSTALLATION Installing Outboard WARNING Before operation, the outboard must be correctly installed with the required mounting hardware as shown. Failure to correctly fasten outboard could result in outboard ejecting off boat transom causing serious injury, death, or property damage. We strongly recommend that your dealer install your outboard and related accessories to ensure proper installation and good performance.

  • Page 24: Propeller Selection

    INSTALLATION Propeller Selection For best all around performance from your outboard/boat combination, select a propeller that allows the engine to operate in the upper half of the recommended full throttle RPM range with the boat normally loaded (refer to General Information - Specifications).

  • Page 25: Transporting

    TRANSPORTING Trailering Boat/Outboard Trailer your boat with the outboard tilted down in a vertical operating position. If additional ground clearance is required, the outboard should be tilted up using an accessory outboard support device. Refer to your local dealer for recommendations. Additional clearance may be required for railroad crossings, driveways and trailer bouncing.

  • Page 26: Fuel & Oil

    (Ethanol) or Ether (MTBE or ETBE). If Ethanol is the oxygenates that is used in the gasoline, refer to Alcohol in Gasoline. These reformulated fuels are acceptable for use in the Mercury engine. ALCOHOL IN GASOLINE We do not recommend the use of gasoline which contains alcohol because of the possible adverse effect the alcohol may have on the fuel system.

  • Page 27: Engine Oil Recommendations

    FUEL & OIL Engine Oil Recommendations We recommend the use of Mercury or Quicksilver SAE 10W-30 multi-viscosity 4-Stroke Outboard Oil for general, all-temperature use. If SAE 25W-40 multi-viscosity oil is preferred, use Mercury MerCruiser 4-cycle engine oil or Quicksilver sterndrive & inboard 4-cycle engine oil. Never use 4-cycle engine oil that is not certified to meet or exceed any one or combination of the following American Petroleum Institute (API) Service Classification SH, SG, SF, CF-4, CE, CD, CDII.
  • Page 28 FUEL & OIL Push the dipstick back in all the way. Reinstall the oil fill cap hand tight. ob00661 Full mark Oil filler cap Add mark...

  • Page 29: Features & Controls

    FEATURES & CONTROLS Remote Control Features Your boat may be equipped with one of the Mercury Precision or Quicksilver remote controls shown. If not, consult your dealer for a description of the functions and operations of the remote control. ob00329 Control handle - forward, neutral, reverse.

  • Page 30: Power Trim And Tilt

    FEATURES & CONTROLS WARNING SYSTEM ACTIVATED If the warning system is activated, immediately reduce engine speed to idle. Shift outboard into neutral and visually check for a steady flow of water discharging from the water pump indicator hole. If no water is flowing out, the water pump is not working and the engine is overheating.

  • Page 31: Power Trim Operation

    FEATURES & CONTROLS ob00663 Trim switch Trim range of travel Tilt range of travel POWER TRIM OPERATION With most boats, operating around the middle of the trim range will give satisfactory results. However, to take full advantage of the trimming capability there may be times when you choose to trim your outboard all the way in or out.
  • Page 32 FEATURES & CONTROLS WARNING Avoid possible serious injury or death. Adjust outboard to an intermediate trim position as soon as boat is on plane to avoid possible ejection due to boat spin out. Do not attempt to turn boat when on plane if outboard is trimmed extremely in or down and there is a pull on the steering wheel or tiller handle.

  • Page 33: Trim Tab Adjustment

    FEATURES & CONTROLS ob00665 AUXILIARY TILT SWITCH The auxiliary tilt switch can be used to tilt the outboard up or down using the power trim system. ob00666 Auxiliary tilt switch SHALLOW WATER OPERATION When operating your boat in shallow water, you can tilt the outboard beyond the maximum trim range to prevent hitting bottom.
  • Page 34 FEATURES & CONTROLS Operate your boat at normal cruising speed, trimmed to the desired position. Turn your boat left and right and note the direction the boat turns more easily. If adjustment is necessary, loosen trim tab bolt and make small adjustments at a time. If the boat turns more easily to the left, move the trailing edge of trim tab to the left.

  • Page 35: Operation

    Wash the outboard exterior and flush out the exhaust outlet of the propeller and gearcase with fresh water after each use. Each month, spray Mercury Precision or Quicksilver Corrosion Guard on external metal surfaces. Do not spray on corrosion control anodes as this will reduce the effectiveness of the anodes.
  • Page 36 OPERATION CAUTION Never start or operate your outboard (even momentarily) without water circulating through all the cooling water intake holes in the gearcase to prevent damage to the water pump (running dry) or overheating of the engine. Check the engine oil level. ob00667 Make sure the cooling water intake is submerged.

  • Page 37: Warming Up Engine

    OPERATION ob00351 Do not advance the neutral fast idle speed feature on the remote control. The enrichener system will automatically increase engine speed for starting and warm-up. ob00560 Turn ignition key to the "start" position. If engine fails to start in ten seconds, return key to "on" position, wait 30 seconds and try again.

  • Page 38: Gear Shifting

    OPERATION Gear Shifting IMPORTANT: Observe the following: • Never shift outboard into gear unless engine speed is at idle. • Do not shift outboard into reverse when the engine is not running. • Your outboard has three gear shift positions to provide operation. Forward (F), Neutral (N) and Reverse (R). •...
  • Page 39 OPERATION ob00351 WARNING When using emergency starter rope to start engine, the start in gear protection device is inoperative. Make sure to set the outboard gear shift into neutral to prevent outboard from starting in gear. Sudden unexpected acceleration could result in serious injury or death. Turn the ignition key to "on"...
  • Page 40 OPERATION Pull the starter rope to start the engine. ob00670 Location of rope knot in notch on flywheel...

  • Page 41: Maintenance

    SELECTING REPLACEMENT PARTS FOR YOUR OUTBOARD We recommend using original Mercury Precision or Quicksilver replacement parts and Genuine Lubricants. WARNING Using a replacement part that is inferior to the original part could result in personal injury, death, or product failure.

  • Page 42: Inspection And Maintenance Schedule

    MAINTENANCE Inspection And Maintenance Schedule BEFORE EACH USE • Check engine oil level. See Fuel & Oil - Checking and Adding Engine Oil. • Check that lanyard stop switch stops the engine. • Visually inspect the fuel system for deterioration or leaks. •...

  • Page 43: Top Cowl Removal And Installation

    MAINTENANCE IMPORTANT: The engine must be run during flushing in order to open the thermostat and circulate water through the water passages. NOTE: You can have the outboard tilted or in the vertical operating position during flushing. WARNING To avoid possible injury when flushing, remove the propeller. Refer to Propeller Replacement, following. Place the outboard in either the operating position (vertical) or in a tilted position.

  • Page 44: Exterior Care

    MAINTENANCE Exterior Care Your outboard is protected with a durable baked enamel finish. Clean and wax often using marine cleaners and waxes. Fuel System WARNING Avoid serious injury or death from gasoline fire or explosion. Carefully follow all fuel system service instructions. Always stop the engine and do not smoke or allow open flames or sparks in the area while servicing any part of the fuel system.

  • Page 45: Steering Link Rod Fasteners

    MAINTENANCE Place the O-ring seal into its proper position on the sight bowl and screw the sight bowl hand tight into the cover. IMPORTANT: Visually inspect for fuel leakage from the filter by squeezing the primer bulb until firm, forcing fuel into the filter.
  • Page 46 MAINTENANCE Each anode requires periodic inspection, especially in salt water which will accelerate the erosion. To maintain this corrosion protection, always replace the anode before it is completely eroded. Never paint or apply a protective coating on the anode as this will reduce effectiveness of the anode. The gearcase has two corrosion control anodes, one on each side.

  • Page 47: Propeller Replacement

    MAINTENANCE Propeller Replacement WARNING If the propeller shaft is rotated while the engine is in gear, there is the possibility that the engine will crank over and start. To prevent this type of accidental engine starting and possible serious injury caused from being struck by a rotating propeller, always shift outboard to neutral position and remove spark plug leads when you are servicing the propeller.
  • Page 48 MAINTENANCE Coat the propeller shaft with Quicksilver or Mercury Precision Lubricants Anti-Corrosion Grease or 2-4-C with Teflon. ob00378 IMPORTANT: To prevent the propeller hub from corroding and seizing to the propeller shaft (especially in salt water), always apply a coat of the recommended lubricant to the entire propeller shaft at the recommended maintenance intervals and also each time the propeller is removed.

  • Page 49: Spark Plug Inspection And Replacement

    MAINTENANCE ob00422 Spark Plug Inspection and Replacement WARNING Avoid serious injury or death from fire or explosion caused by damaged spark plug boots. Damaged spark plug boots can emit sparks. Sparks can ignite fuel vapors under the engine cowl. To avoid damaging spark plug boots, do not use any sharp object or metal tool such as pliers, screwdriver, etc.

  • Page 50: Fuse Replacement - 75/90 4-Stroke Models

    Spark plug Fuse Replacement - 75/90 4-Stroke Models The electrical wiring circuits on the outboard are protected from overload by fuses in the wiring. If a fuse is blown, try to locate and correct the cause of the overload. If the cause is not found, the fuse may blow again.

  • Page 51: Fuse Replacement - 115 4-Stroke Models

    MAINTENANCE Fuse Replacement - 115 4-Stroke Models The electrical wiring circuits on the outboard are protected from overload by fuses in the wiring. If a fuse is blown, try to locate and correct the cause of the overload. If the cause is not found, the fuse may blow again. Remove the plastic cover and remove the fuse with the fuse puller.

  • Page 52: Battery Inspection

    Propeller Shaft - Refer to Propeller Replacement for removal and installation of the propeller. Coat the entire propeller shaft with lubricant to prevent the propeller hub from corroding and seizing to the shaft. ob00378 Lubricate Points the following with Quicksilver or Mercury Precision Lubricants 2-4-C with Teflon or Special Lubricant 101. •...

  • Page 53: Checking Power Trim Fluid

    MAINTENANCE ob00684 • Steering Cable Grease Fitting (If equipped) - Rotate steering wheel to fully retract the steering cable end into the outboard tilt tube. Lubricate through fitting. ob00685 Fitting Steering cable end WARNING The end of the steering cable must be fully retracted into the outboard tilt tube before adding lubricant. Adding lubricant to steering cable when fully extended could cause steering cable to become hydraulically locked.

  • Page 54: Changing Engine Oil

    Remove fill cap and check fluid level. The fluid level should be even with the bottom of the fill hole. Add Quicksilver or Mercury Precision Lubricants Power Trim & Steering Fluid. If not available, use automotive (ATF) automatic transmission fluid.

  • Page 55: Gearcase Lubrication

    MAINTENANCE ob00689 ob00692 75/90 4-Stroke Models 115 4-Stroke Models OIL FILLING Remove the oil fill cap and add oil to proper operating level. Idle engine for five minutes and check for leaks. Stop engine and check oil level on dipstick. Add oil if necessary.

  • Page 56: Submerged Outboard

    GEARCASE LUBRICANT CAPACITY Gearcase lubricant capacity is approximately 710 ml (24 fl. oz.). GEARCASE LUBRICANT RECOMMENDATION Mercury or Quicksilver Premium or High Performance Gear Lubricant. CHECKING LUBRICANT LEVEL AND FILLING GEARCASE Place outboard in a vertical operating position. Remove the front vent plug and rear vent plug.

  • Page 57: Storage

    Lubricate all outboard components listed in Maintenance - Inspection and Maintenance Schedule. • Touch up any paint nicks. See your dealer for touch-up paint. • Spray Quicksilver or Mercury Precision Lubricants Corrosion Guard on external metal surfaces (except corrosion control anodes). Protecting Internal Engine Components •...
  • Page 58 STORAGE • Store the battery in a cool, dry place. • Periodically check the water level and recharge the battery during storage.

  • Page 59: Starter Motor Will Not Crank The Engine (Electric Start Models)

    TROUBLESHOOTING Starter Motor Will Not Crank The Engine (Electric Start Models) POSSIBLE CAUSES • Blown 20 Amp fuse in the starting circuit. Refer to Maintenance section. • Outboard is not shifted to neutral position. • Weak battery or battery connections are loose or corroded. •...

  • Page 60: Performance Loss

    TROUBLESHOOTING Performance Loss POSSIBLE CAUSES • Low oil pressure. Check oil level. • Throttle not fully open. • Damaged or improper size propeller. • Incorrect engine timing, adjustments, or setup. • Boat overloaded or load improperly distributed. • Excessive water in bilge. •...

  • Page 61: Local Repair Service

    Your satisfaction with your outboard product is very important to your dealer and to us. If you ever have a problem, question or concern about your outboard product, contact your dealer or any authorized Mercury Marine dealership. If additional assistance is required, take these steps.

  • Page 62: Owner Service Assistance

    Telephone (954) 744-3513 Mercury Marine 11650 Interchange Circle North Miramar, FL 33025 (954) 744-3535 U.S.A. Japan Telephone 81-053-423-2500 Mercury Marine - Japan Anshin-cho 283-1 Hamamatsu 81-053-423-2510 Shizuoka-ken, Japan 435-0005 Japan Asia, Singapore Telephone 5466160 Mercury Marine Singapore 72 Loyang Way...

This manual is also suitable for:

90115 efi75 efi 4-stroke90 efi 4-stroke115 efi 4-stroke

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