Yamaha 90A Owner's Manual
  1. Manuals
  2. Brands
  3. Yamaha Manuals
  4. Outboard Motor
  5. 90A
  6. Owner's manual

Yamaha 90A Owner's Manual

Hide thumbs Also See for 90A:
Table of Contents

Advertisement

Quick Links

See also: Service Manual
90A
OWNER'S MANUAL
q
q
Read this manual carefully before operating this
q
q
outboard motor.
6H1-28199-27-E0

Advertisement

Table of Contents
loading

Related Manuals for Yamaha 90A

Summary of Contents for Yamaha 90A

  • Page 1 OWNER’S MANUAL Read this manual carefully before operating this outboard motor. 6H1-28199-27-E0...
  • Page 2 EMU25052 Read this manual carefully before operating this outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.

  • Page 3: Important Manual Information

    Any damage tain maximum enjoyment from your new resulting from neglect of these instructions is Yamaha. If you have any question about the not covered by warranty. operation or maintenance of your outboard Some countries have laws or regulations re- motor, please consult a Yamaha dealer.

  • Page 4: Table Of Contents

    Table of contents Safety information......1 Engine oil requirements ....12 Fuel requirements ......12 Outboard motor safety ....1 Gasoline .......... 12 Propeller..........1 Muddy or acidic water ....12 Rotating parts........1 Anti-fouling paint ......12 Hot parts ........... 1 Motor disposal requirements..
  • Page 5 Table of contents Hour meter ........23 Operating engine ......39 Oil level indicator (digital type) ..24 Feeding fuel (portable tank) .... 39 Overheat-alert indicator ....24 Starting engine ........ 40 Digital speedometer ...... 24 Checks after starting engine ..43 Speedometer ........
  • Page 6 Table of contents Checking fuel filter ......62 Inspecting idling speed ....62 Checking water in engine oil tank ... 63 Checking wiring and connectors ..63 Checking propeller ......63 Removing propeller ......64 Installing propeller ......64 Changing gear oil ......65 Cleaning fuel tank ......

  • Page 7: Safety Information

    Safety information EMU33622 tor and the clamp bracket when the motor is Outboard motor safety trimmed or tilted. Keep body parts out of this Observe these precautions at all times. area at all times. Be sure no one is in this EMU36500 area before operating the power trim and tilt Propeller...

  • Page 8: Gasoline Exposure And Spills

    Personal flotation devices cording to the boat manufacturers instruc- Have an approved personal flotation device tions. Overloading or incorrect weight (PFD) on board for every occupant. Yamaha distribution can compromise the boats han-...

  • Page 9: Avoid Collisions

    Safety information dling and lead to an accident, capsizing or boating in hazardous weather. swamping. EMU33880 Passenger training EMU33771 Avoid collisions Make sure at least one other passenger is Scan constantly for people, objects, and trained to operate the boat in the event of an other boats.

  • Page 10: General Information

    Record your outboard motor serial number in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in case your outboard motor is sto- len. 1. Key number...

  • Page 11: Ce Marking

    General information EMU25203 EMU25213 CE Marking C-Tick label Outboard motors affixed with this “CE”mark- Engines affixed with this label conform to ing conform with the directives of; 98/37/EC, certain portion(s) of the Australian Radio 94/25/EC - 2003/44/EC and 2004/108/EC. Communications Act. ZMU04693 ZMU04694 1.

  • Page 12: Read Manuals And Labels

    Read any manuals supplied with the boat. ● Read all labels on the outboard motor and the boat. ● If you need any additional information, contact your Yamaha dealer. EMU33831 Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements. ZMU06213...
  • Page 13 General information ZMU05670 EMU33912 Contents of labels EWM01671 The above warning labels mean as follows. WARNING Read Owner’s Manuals and labels. ● EWM01691 Wear an approved personal flotation ● WARNING device (PFD). Emergency starting does not have start- Attach engine shut-off cord (lanyard) to ●...
  • Page 14 General information EMU33843 Electrical hazard Symbols The following symbols mean as follows. Notice/Warning ZMU05666 Remote control lever/gear shift lever operat- ing direction, dual direction ZMU05696 Read Owner’s Manual ZMU05667 Engine start/ Engine cranking ZMU05664 Hazard caused by continuous rotation ZMU05668 ZMU05665...

  • Page 15: Specifications And Requirements

    Specifications and requirements EMU31480 Engine: Specifications Type: TIP: 2-stroke L Displacement: “(AL)” stated in the specification data below 1140.0 cm represents the numerical value for the alumi- Bore × stroke: num propeller installed. 82.0 × 72.0 mm (3.23 × 2.83 in) Likewise, “(SUS)”...

  • Page 16: Installation Requirements

    Vibration on tiller handle (ICOMIA 38/94): working correctly and you should dis- 2.8 m/s continue using the outboard. Contact EMU33553 your Yamaha dealer. Installation requirements The remote control unit must be equipped EMU33563 Boat horsepower rating with a start-in-gear protection device(s). This...

  • Page 17: Mounting Battery

    1. Propeller diameter in inches 2. Propeller pitch in inches Your Yamaha dealer can help you select the 3. Type of propeller (propeller mark) right propeller for your boating needs. Select a propeller that will allow the engine to reach...

  • Page 18: Engine Oil Requirements

    Specifications and requirements EMU25651 engine starting and running problems. Engine oil requirements Yamaha does not recommend gasohol con- taining methanol because it can cause fuel Recommended engine oil: system damage or engine performance YAMALUBE 2-stroke outboard motor problems. EMU36880 Muddy or acidic water...

  • Page 19: Emergency Equipment

    Spare parts, such as an extra set of spark ● EMU25332 Manufactured date label plugs. This label is attached to the clamp bracket or Consult your Yamaha dealer for details. the swivel bracket. EMU25221 Emission control information EMU25310 U.S. insular areas Engines affixed with the label pictured below conform to U.S.

  • Page 20: Components

    Components EMU2579J Components diagram TIP: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. YAMAHA SPEED Km/h knot mile TRIP TIME BATT mode ZMU03850 1. Top cowling 16. Tachometer* 2. Top cowling lock lever 17.

  • Page 21: Fuel Joint

    Components mercial users should conform to relevant licensing or approval authority regula- tions. 1. Power trim and tilt switch 2. Remote control lever 3. Neutral interlock trigger ZMU02284 4. Neutral throttle lever 1. Fuel joint 5. Main switch 2. Fuel gauge 6.

  • Page 22: Neutral Interlock Trigger

    Components 6. Throttle 7. Fully open EMU26201 Neutral interlock trigger To shift out of neutral, first pull the neutral in- terlock trigger up. 1. Fully open 2. Fully closed EMU25911 Tiller handle To change direction, move the tiller handle to the left or right as necessary.

  • Page 23: Throttle Grip

    Components 1. Throttle indicator 1. Forward “ ” 2. Neutral “ ” EMU25973 3. Reverse “ ” Throttle friction adjuster A friction device provides adjustable resis- EMU25941 tance to movement of the throttle grip or the Throttle grip remote control lever, and can be set accord- The throttle grip is on the tiller handle.

  • Page 24: Engine Shut-Off Cord (Lanyard) And Clip

    Components When constant speed is desired, tighten the 1. Cord adjuster to maintain the desired throttle set- 2. Clip ting. 3. Engine shut-off switch EMU25993 Engine shut-off cord (lanyard) and clip The clip must be attached to the engine shut- off switch for the engine to run.

  • Page 25: Main Switch

    Components EMU26090 set according to operator preference. An ad- Main switch justing screw or bolt is located on the clamp The main switch controls the ignition system; bracket, on the right (starboard) side of the its operation is described below. through tube end.

  • Page 26: Power Trim And Tilt Switch On Bottom Engine Cowling

    Components distract the operator, increasing the risk of collision with another boat or an obsta- cle. ZMU03851 EMU26244 Trim tab with anode EWM00840 WARNING An improperly adjusted trim tab could cause difficult steering. Always test run after the trim tab has been installed or re- EMU26153 placed to be sure steering is correct.

  • Page 27: Trim Rod (Tilt Pin)

    Components EMU26341 Tilt support lever for power trim and tilt model To keep the outboard motor in the tilted up position, lock the tilt support lever to the clamp bracket. ZMU03853 ECM00660 NOTICE Do not use the tilt support lever or knob when trailering the boat.

  • Page 28: Flushing Device

    Components EMU26460 Flushing device This device is used to clean the cooling wa- ter passages of the motor using a garden hose and tap water. TIP: For details on usage, see page 55. ZMU03854 1. Top cowling lock lever(s) ZMU03857 1.

  • Page 29: Instruments And Indicators

    Instruments and indicators EMU26493 the power trim and tilt switch. Digital tachometer If the trim angle of your motor exceeds the ● The tachometer shows the engine speed trim operating range, the top segment on and has the following functions. the trim meter display will blink.

  • Page 30: Oil Level Indicator (Digital Type)

    Instruments and indicators EMU26551 Oil level indicator (digital type) This indicator shows the engine oil level. If the oil level falls below the lower limit, the alert indicator will start to blink. For further in- formation, see page 28. ECM00030 NOTICE Do not operate the engine without oil.

  • Page 31: Fuel Gauge

    Press the “ ” (set) button; the hour dis- the gauge will give false readings. Consult play will begin blinking. your Yamaha dealer on how to correctly set Press the “ ” (mode) button until the the selector switch. NOTICE: Running out desired hour is displayed.

  • Page 32: Fuel Level-Alert Indicator

    Get back to the port soon if an alert device has activated. For charging the battery, con- sult your Yamaha dealer. The clock operates on battery power. Dis- connecting the battery will stop the clock. Reset the clock after connecting the battery.

  • Page 33: Analog Speedometer

    For in- structions on how to select the counting mode, consult your Yamaha dealer. ZMU04581 Memorize the trim angles that work best for your boat under different conditions. Adjust the trim angle to the desired setting with the power trim and tilt switch.

  • Page 34: Engine Control System

    Alert system ECM00091 NOTICE Do not continue to operate the engine if a alert device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected. EMU2681A Overheat alert This engine has an overheat-alert device. If If the alert system has activated, stop the en-...
  • Page 35 Engine control system nally oil filter clogging. ZMU03942 ZMU03828 1. Oil filter ZMU04586 The buzzer will sound (if equipped on the ● tiller handle, remote control box, or main switch panel). ZMU03025 If the alert system has been activated, stop the engine and check for the cause.

  • Page 36: Installation

    Test runs at differ- centerline (keel line) of the boat. ent heights can help determine the optimum mounting height. Consult your Yamaha deal- er or boat manufacturer for further informa- tion on determining the proper mounting...
  • Page 37 Installation ZMU01762 ECM01630 NOTICE During water testing, check the buoy- ● ancy of the boat, at rest, with its maxi- mum load. Check that the static water level on the exhaust housing is low enough to prevent water entry into the power head when water rises due to waves when the outboard is not run- ning.

  • Page 38: Operation

    5 minutes at a time. After the first 10 hours: Operate the engine normally. Use only straight gasoline in the fuel tank. The Yamaha oil injection system provides proper lubrication for normal operation. EMU36400 Getting to know your boat : Gasoline Different boats handle differently.

  • Page 39: Fuel Level

    Check that the fuel filter is clean and free of lift off the cowling. water. If any water is found in the fuel, or if a significant amount of debris is found, the fuel tank should be checked and cleaned by a Yamaha dealer. ZMU06093 EMU36441 Fuel system EWM00060...

  • Page 40: Engine Shut-Off Cord (Lanyard)

    Operation to the fully open position. Make sure that it turns smoothly and that it completely re- turns to the fully closed position. Look for loose or damaged connections of ● the throttle and shift cables under the en- gine cowling. Remote control models: Turn the steering wheel full-right and full- ●...

  • Page 41: Flushing Device

    EMU36961 Install cowling flowing after 10 minutes of idling, consult Be sure that all cowling lock levers are your Yamaha dealer. released. Be sure that the rubber seal is seated all the way around the engine. Place the cowling on top of the seal.

  • Page 42: Checking Power Trim And Tilt System

    Operation EMU29158 Checking power trim and tilt system EWM01930 WARNING Never get under the lower unit while it ● is tilted, even when the tilt support lever is locked. Severe injury could occur if the outboard motor accidentally falls. Body parts can be crushed between the ●...

  • Page 43: Filling Oil For Electric Start Models

    Do not add gasoline into the oil tank. Fire gine oil tank. or explosion could result. This engine uses the Yamaha oil injection system, which provides superior lubrication by ensuring the proper oil ratio for all operat- ing conditions. No fuel premixing is needed.
  • Page 44 Operation ZMU03371 1. Oil filler access cap 2. Oil tank filler cap After filling, replace the all caps secure-...

  • Page 45: Oil Level Indicator Operation

    Operation EMU27321 Oil level indicator operation The various functions of the oil level system are as follows: EMU27372 Electric start models Oil level-alert Oil level-alert indicator indicator (analog Engine oil tank Remarks (digital tachometer/ tachometer) bottom cowling) Green more than 1130 cm No refilling necessary.

  • Page 46: Starting Engine

    Operation tank cap, loosen it 2 or 3 turns. ZMU02025 ZMU02295 EMU27492 Starting engine If there is a fuel joint on the motor, firmly EWM01600 connect the fuel line to the joint. Then WARNING firmly connect the other end of the fuel Before starting the engine, make sure line to the joint on the fuel tank.
  • Page 47 Operation Turn the main switch to “ ” (start), TIP: and hold it for a maximum of 5 seconds. The start-in-gear protection device prevents the engine from starting except when in neu- tral. Attach the engine shut-off cord to a se- cure place on your clothing, or your arm or leg.
  • Page 48 Operation page 43. cure place on your clothing, or your arm If the engine is warm and fails to start, or leg. Then install the clip on the other ● open the throttle slightly and try to start the end of the cord into the engine shut-off engine again.

  • Page 49: Checks After Starting Engine

    EMU36980 case or the cooling water pilot hole is Stop switches blocked. Consult your Yamaha dealer if Turn the main switch to “ ”, or press the ● the problem cannot be located and cor- engine stop button and make sure the en- rected.

  • Page 50: Shifting

    Operation EMU33492 Shifting EWM00180 WARNING Before shifting, make sure there are no swimmers or obstacles in the water near you. ECM01610 NOTICE Warm up the engine before shifting into gear. Until the engine is warm, the idle speed may be higher than normal. High idle speed can prevent you from shifting back to neutral.

  • Page 51: Stopping Boat

    Operation pact the steering wheel or other parts of the boat. This could increase the risk of serious injury. It could also damage the shift mechanism. Do not shift into reverse while traveling ● at planing speeds. Loss of control, boat swamping, or damage to the boat could occur.

  • Page 52: Trimming Outboard Motor

    Operation ZMU02301 Remove the key if the boat will be left unattended. TIP: The engine can also be stopped by pulling the cord and removing the clip from the en- gine shut-off switch, then turning the main switch to “ ”...

  • Page 53: Adjusting Trim Angle (Power Trim And Tilt)

    Operation switch while the boat is moving. Adjust the outboard motor trim angle using the power trim and tilt switch. ZMU03110 1. Power trim and tilt switch ZMU03109 1. Trim operating angle EMU27885 Adjusting trim angle (Power trim and tilt) ZMU05793 EWM00753 WARNING...

  • Page 54: Adjusting Boat Trim

    Operation “ ” (up). To lower the bow (trim-in), press the switch “ ” (down). Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions. EMU27911 Adjusting boat trim When the boat is on plane, a bow-up attitude results in less drag, greater stability and effi- ciency.

  • Page 55: Procedure For Tilting Up

    Operation duce salt corrosion. EWM00221 WARNING Be sure all people are clear of the out- board motor when tilting up and down, Body parts can be crushed between the motor and the clamp bracket when the motor is trimmed or tilted. EWM00250 WARNING Press the power trim and tilt switch “...

  • Page 56: Procedure For Tilting Down

    Operation and tilt switch “ ” (down) to retract the trim rods. NOTICE: Be sure to retract the trim rods completely during mooring. This protects the rods from marine growth and corrosion which could damage the power trim and tilt mechanism.

  • Page 57: Shallow Water

    Operation ting up for and cruising in shallow water. Otherwise severe damage from overheat- ing can result. EMU32912 Procedure for power trim and tilt models Place the remote control lever / gear shift lever in neutral. ZMU01936 ZMU03525 ZMU03876 Slightly tilt the outboard motor up to the desired position using the power trim and tilt switch.

  • Page 58: Cruising In Other Conditions

    Cruising in muddy, turbid, or acidic water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (see page 12) if you use the outboard motor in acidic water or water with a lot of sediment in it, such as muddy or turbid (cloudy) water.

  • Page 59: Maintenance

    Flushing with the flushing attachment sition using a motor support device such as Wash the outboard motor body using a transom saver bar. Consult your Yamaha fresh water. NOTICE: Do not spray wa- dealer for further details. ter into the air intake.

  • Page 60: Lubrication (Oil Injection Models)

    Keep hands, hair, and seal. Seal replacement should be per- clothes away from the flywheel and formed by an authorized Yamaha dealer other rotating parts while the engine prior to use. is running.

  • Page 61: Flushing Power Unit

    Contact your fresh water supply, and then connect it Yamaha dealer for information about fogging to the garden hose connector. oil and procedures for your engine. With the engine off, turn on the water tap...

  • Page 62: Checking Painted Surface Of Motor

    EMU2850A Replacement parts Periodic maintenance If replacement parts are necessary, use only EWM01871 genuine Yamaha parts or parts of equivalent WARNING design and quality. Any part of inferior quality These procedures require mechanical may malfunction, and the resulting loss of skills, tools, and supplies.
  • Page 63 Outboard motors operating under any of these above conditions require more fre- quent maintenance. Yamaha recommends that you do this service twice as often as specified in the maintenance chart. For ex- ample, if a particular service should be done at 50 hours, do it instead at 25 hours.

  • Page 64: Maintenance Chart 1

    The “ ” symbol indicates the check-ups which you may carry out yourself. The “ ” symbol indicates work to be carried out by your Yamaha dealer. Initial Every 20 hours Item...
  • Page 65 Maintenance Initial Every 20 hours Item Actions hours (1 hours (3 hours (5 months) year) years) years) Fuel line(High pres- Inspection or replace- sure) ment as necessary Fuel line(Low pres- Inspection sure) Fuel line(Low pres- Inspection or replace- sure) ment as necessary Inspection or replace- Fuel pump ment as necessary...

  • Page 66: Maintenance Chart 2

    Water inlet Inspection Main switch/stop Inspection or replace- switch/choke switch ment as necessary (Yamaha) Meter/gauge Inspection Inspection and clean- (Yamaha) Fuel tank ing as necessary EMU34451 Maintenance chart 2 Every Item Actions 1000 hours Guide exhaust/exhaust Inspection or replace-...

  • Page 67: Greasing

    Maintenance EMU28941 Greasing Yamaha grease A (water resistant grease) Yamaha grease D (corrosion resistant grease; for propeller shaft) ZMU03879 EMU28955 erosion becomes excessive, or if carbon and Cleaning and adjusting spark plug other deposits are excessive, you should re- The spark plug is an important engine com- place the spark plug with another of the cor- ponent and is easy to inspect.

  • Page 68: Checking Fuel Filter

    For cleaning or replacement of the Be sure to use the specified spark plug, fuel filter, consult your Yamaha dealer. otherwise the engine may not operate properly. Before fitting the spark plug, measure the electrode gap with a wire thickness gauge;...

  • Page 69: Checking Water In Engine Oil Tank

    If you have difficulty ver- ifying the idle speed, or the idle speed re- quires adjustment, consult a Yamaha dealer or other qualified mechanic. Verify whether the idle speed is set to ZMU03882 specification.

  • Page 70: Removing Propeller

    Otherwise the propeller could come off during opera- tion and be lost. Check the propeller shaft oil seal for dam- ● Apply Yamaha marine grease or a cor- age. rosion resistant grease to the propeller EMU30661 shaft.

  • Page 71: Changing Gear Oil

    Consult a or knob is locked. Severe injury could Yamaha dealer for repair of the lower occur if the outboard motor accidental- unit seals. [ECM00711] ly falls.

  • Page 72: Cleaning Fuel Tank

    If you have any question about properly ● Remove the screws holding the fuel joint doing this procedure, consult your assembly. Pull the assembly out of the Yamaha dealer. tank. Keep away from sparks, cigarettes, ● flames, or other sources of ignition when cleaning the fuel tank.

  • Page 73: Inspecting And Replacing Anode(S)

    Replace the gasket with a new one. Re- install the fuel joint assembly and tighten the screws firmly. EMU29312 Inspecting and replacing anode(s) Yamaha outboard motors are protected from corrosion by sacrificial anodes. Inspect the ZMU03888 external anodes periodically. Remove scales EMU29322 from the surfaces of the anodes.

  • Page 74: Connecting The Battery

    If the battery needs charg- The electrical contacts of the battery and ing, consult your Yamaha dealer. cables must be clean and properly con- Check the battery connections. They nected, or the battery will not start the should be clean, secure, and covered by engine.
  • Page 75 Maintenance tions.

  • Page 76: Trouble Recovery

    Q. Has fuel pump malfunctioned? If your outboard motor requires repair, bring A. Have serviced by a Yamaha dealer. it to your Yamaha dealer. If the engine trouble-alert indicator is flash- Q. Are spark plug(s) fouled or of incorrect ing, consult your Yamaha dealer.
  • Page 77 Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel. Q. Is carburetor clogged? A. Have serviced by a Yamaha dealer. Q. Is fuel filter clogged? A. Clean or replace filter. Q. Is fuel joint connection incorrect? A.
  • Page 78 Q. Is fuel system obstructed? Q. Is water pump or thermostat faulty? A. Check for pinched or kinked fuel line or A. Have serviced by a Yamaha dealer. other obstructions in fuel system. Q. Is there excess water in fuel filter cup? Q.

  • Page 79: Temporary Action In Emergency

    EWM00631 Q. Is steering pivot loose or damaged? WARNING A. Tighten or have serviced by a Yamaha Substituting an incorrect fuse or a piece dealer. of wire could allow excessive current EMU29433 flow.

  • Page 80: Power Trim And Tilt Will Not Operate

    2. Fuse (20 A) used to start the engine, the start-in- gear protection device does not oper- Consult your Yamaha dealer if the new fuse ate. Make sure the remote control lever immediately blows again. is in neutral. Otherwise the boat could...

  • Page 81: Emergency Starting Engine

    Trouble Recovery wheel or other moving parts when the engine is running. Do not install the starter mechanism or top cowling after the engine is running. Do not touch the ignition coil, spark ● plug wire, spark plug cap, or other elec- trical components when starting or op- erating the motor.

  • Page 82: Engine Fails To Operate

    Trouble Recovery ZMU03892 ZMU03893 TIP: 1. CDI unit When the engine does not start with this pro- 2. Yellow cord cedure, see page 76. EMU29706 EMU29671 Cold engine fails to start Engine fails to operate If the engine fails to start when it is cold, use EMU29691 the following procedure.
  • Page 83 Trouble Recovery ON START OPEN CLOSE ZMU03144 ZMU03894 Squeeze the primer pump two or three Turn the main switch to “ ” (start). times to feed fuel. NOTICE: Never turn the main switch to “ ” (start) while the engine is running.

  • Page 84: Treatment Of Submerged Motor

    EMU33501 Treatment of submerged motor If the outboard motor is submerged, immedi- ately take it to a Yamaha dealer. Otherwise some corrosion may begin almost immedi- ately. NOTICE: Do not attempt to run the outboard motor until it has been com- pletely inspected.
  • Page 86 YAMAHA MOTOR CO., LTD. Printed in Japan April 2008–0.1 × 1 ! Printed on recycled paper...

This manual is also suitable for:

60f70b

Table of Contents