Yamaha 90a Owner's Manual
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- Owner's manual (86 pages) ,
- Service manual (204 pages) ,
- Owner's manual (215 pages)
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Summary of Contents for Yamaha 90a
- Page 1 OWNER’S MANUAL Read this manual carefully before operating this outboard motor. 6H1-28199-2A-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.
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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 ....11 Fuel requirements ......11 Outboard motor safety ..... 1 Gasoline .......... 11 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 Speedometer ........22 Starting engine ........ 38 Fuel gauge ........23 Checks after starting engine ..41 Trip meter / Clock / Voltmeter ..23 Cooling water ........41 Fuel level-alert indicator ....24 Warming up engine......41 Low battery voltage-alert Electric start and prime start indicator ........
- Page 6 Table of contents Checking water in engine oil tank ... 61 Inspecting wiring and connectors..61 Checking propeller ......61 Removing propeller ......62 Installing propeller ......62 Changing gear oil ......63 Cleaning fuel tank ......64 Inspecting and replacing anode(s)........
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Page 7: Safety Information
Safety information tor and the clamp bracket when the motor is EMU33622 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 EMU36501 area before operating the power trim and tilt Propeller... -
Page 8: Gasoline Exposure And Spills
Have an approved personal flotation device tions. Overloading or incorrect weight (PFD) on board for every occupant. Yamaha distribution can compromise the boats han- recommends that you must wear a PFD dling and lead to an accident, capsizing or... -
Page 9: Avoid Collisions
Safety information swamping. EMU33880 Passenger training EMU33772 Avoid collisions Make sure at least one other passenger is Scan constantly for people, objects, and oth- trained to operate the boat in the event of an er boats. Be alert for conditions that limit your emergency. -
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: C-Tick Label
General information ZMU06654 ZMU01697 1. CE marking location ZMU06040 EMU25213 C-Tick label Engines affixed with this label conform to certain portion(s) of the Australian Radio Communications Act. ZMU06655 1. C-Tick label location... -
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. EMU33832 Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements. ZMU06469... - 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 Electrical hazard EMU33843 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...
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Page 15: Specifications And Requirements
Specifications and requirements Ignition system: EMU31480 Specifications CDI (micro computer) TIP: Spark plug (NGK): “(AL)” stated in the specification data below B8HS-10 Spark plug with resistor (NGK): represents the numerical value for the alumi- BR8HS-10 num propeller installed. Spark plug gap: 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 EMU33554 your Yamaha dealer. Installation requirements The remote control unit must be equipped EMU33564 Boat horsepower rating with a start-in-gear protection device(s). This... -
Page 17: Multiple Batteries
Recommended engine oil: appropriate. YAMALUBE 2-stroke outboard motor Your Yamaha dealer can help you select the right propeller for your boating needs. Select a propeller that will allow the engine to reach If the recommended engine oil is not avail-... -
Page 18: Muddy Or Acidic Water
Keep the following items onboard in case Yamaha does not recommend gasohol con- there is trouble with the outboard motor. taining methanol because it can cause fuel A tool kit with assorted screwdrivers, pli- ●... -
Page 19: Components
Components EMU2579T Components diagram TIP: * May not be exactly as shown; also may not be included as standard equipment on all mod- els (order from dealer). YAMAHA SPEED Km/h knot mile TRIP TIME BATT mode ZMU07225 1. Top cowling 16. -
Page 20: Fuel Joint
Components licensing or approval authority regula- tions. 1. Power trim and tilt switch 2. Remote control lever ZMU02284 3. Neutral interlock trigger 1. Fuel joint 4. Neutral throttle lever 2. Fuel gauge 5. Main switch 3. Fuel tank cap 6. Engine shut-off switch 4. -
Page 21: Neutral Interlock Trigger
Components when the neutral throttle lever is in the closed 6. Throttle position. 7. Fully open EMU25912 Tiller handle EMU26201 Neutral interlock trigger To change direction, move the tiller handle to To shift out of neutral, first pull the neutral in- the left or right as necessary. -
Page 22: Throttle Indicator
Components or throttle grip, which could result in an accident. [EWM00032] EMU25961 Throttle indicator The fuel consumption curve on the throttle indicator shows the relative amount of fuel consumed for each throttle position. Choose the setting that offers the best performance and fuel economy for the desired operation. -
Page 23: Engine Stop Button
Components tangled, preventing it from functioning. Avoid accidentally pulling the cord dur- ing normal operation. Loss of engine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be thrown forward. -
Page 24: Steering Friction Adjuster
Components EMU26143 Power trim and tilt switch on remote control or tiller handle The power trim and tilt system adjusts the outboard motor angle in relation to the tran- som. Pressing the switch “ ” (up) trims the outboard motor up, and then tilts it up. Press- ing the switch “... -
Page 25: Trim Tab With Anode
Components trims it down. When the switch is released, turn the trim tab rear end to the port side “A” the outboard motor will stop in its current po- in the figure. If the boat tends to veer to the sition. -
Page 26: Cowling Lock Lever(S) (Turn Type)
Components ZMU03853 ZMU03855 ECM00660 1. Cowling lock lever(s) NOTICE Do not use the tilt support lever or knob EMU26462 Flushing device when trailering the boat. The outboard This device is used to clean the cooling wa- motor could shake loose from the tilt sup- ter passages of the motor using a garden port and fall. -
Page 27: Instruments And Indicators
Instruments and indicators the power trim and tilt switch. EMU26493 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 28: 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 26. ECM00030 NOTICE Do not operate the engine without oil. -
Page 29: 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 30: 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 31: Analog Speedometer
EMU26611 Analog trim meter on or only when the engine is running. For in- structions on how to select the counting This gauge shows the trim angle of your out- mode, consult your Yamaha dealer. board motor. -
Page 32: 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. EMU2681C Overheat alert This engine has an overheat-alert device. If If the alert system has activated, stop the en-... - Page 33 Engine control system ZMU03942 ZMU06656 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. TIP: The alert for oil filter clogging is similar to the alerts for low oil level and overheating.
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Page 34: 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 35 Installation ZMU01762 ECM01634 NOTICE Make sure that the idle hole is high ● enough to prevent water from entering the engine even if the boat is stationary with the maximum load. Incorrect engine height or obstructions ● to the smooth flow of water (such as the design or condition of the boat, or ac- cessories, such as transom ladders or depth finder transducers) can create...
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Page 36: 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 37: Fuel Level
To remove the en- significant amount of debris is found, the fuel gine cowling, release all the lock levers and tank should be checked and cleaned by a lift off the cowling. Yamaha dealer. ZMU06093 ZMU06184 EMU36442 Fuel system... -
Page 38: Engine Shut-Off Cord (Lanyard)
Operation Remote control models: Turn the steering wheel full-right and full- ● left. Make sure operation is smooth and unrestricted throughout the whole range with no binding or excessive free play. Operate the throttle levers several times to ● make sure there is no hesitation in their travel. -
Page 39: Flushing Device
EMU36963 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 top cowling. Place the top cowling on bottom cowling. -
Page 40: 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 41: Battery
Operation the tilt rod and trim rods operate smooth- EMU36582 Battery Check that the battery is in good condition, and fully charged. Check that the battery connections are clean, secure and covered by insulating covers. The electrical contacts of the battery and cables must be clean and properly connected or the battery will not ZMU06621 start the engine. -
Page 42: Filling Oil For Electric Start Models
EWM00530 WARNING Do not add gasoline into the oil tank. Fire or explosion could result. This engine uses the Yamaha oil injection ZMU03370 system, which provides superior lubrication by ensuring the proper oil ratio for all operat- Slowly pour the engine oil into the en- ing conditions. -
Page 43: 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 No refilling necessary. -
Page 44: Starting Engine
Operation If a steering friction adjuster is provided on your outboard motor, securely attach the fuel line to the fuel line clamp. Squeeze the primer pump, with the ar- row pointing up, until you feel it become firm. During engine operation place the tank horizontally, otherwise fuel cannot be drawn from the fuel tank. - Page 45 Operation venting it from functioning. return the throttle to the fully closed po- Avoid accidentally pulling the cord dur- sition. ● ing normal operation. Loss of engine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be thrown forward.
- Page 46 Operation the engine from starting except when in neu- TIP: tral. When the engine is cold, it needs to be ● Attach the engine shut-off cord to a se- warmed up. For further information, see cure place on your clothing, or your arm page 41.
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Page 47: Checks After Starting Engine
Confirm that the engine cannot be started ● blocked. Consult your Yamaha dealer if with the clip removed from the engine the problem cannot be located and cor- shut-off switch. - Page 48 Operation 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. If this occurs, stop the engine, shift to neutral, then restart the engine and allow it to warm up.
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Page 49: Stopping Boat
Operation EMU27821 Stopping engine Before stopping the engine, first let it cool off for a few minutes at idle or low speed. Stop- ping the engine immediately after operating at high speed is not recommended. EMU27847 Procedure Push and hold the engine stop button or turn the main switch to “... -
Page 50: Trimming Outboard Motor
Operation the fuel line if there is a fuel joint on the to steer, slow down and/or readjust the trim angle. outboard motor. The trim angle of the outboard motor helps determine the position of the bow of the boat in the water. -
Page 51: Adjusting Boat Trim
Operation tween the motor and the clamp bracket when the motor is trimmed or tilted. Use caution when trying a trim position ● for the first time. Increase speed gradu- ally and watch for any signs of instabil- ity or control problems. Improper trim angle can cause loss of control. -
Page 52: Tilting Up And Down
Operation Bow Up motor trim angle may have little effect on the Too much trim-out puts the bow of the boat trim of the boat when operating. too high in the water. Performance and econ- EMU27935 Tilting up and down omy are decreased because the hull of the boat is pushing the water and there is more If the engine will be stopped for some time or... - Page 53 Operation ZMU03196 ZMU03872 Press the power trim and tilt switch “ ” Pull the tilt support lever toward you to (up) until the outboard motor has tilted support the engine. WARNING! After tilting the outboard motor, be sure to up completely. support it with the tilt support knob or tilt support lever.
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Page 54: Procedure For Tilting Down (Power Trim And Tilt Models)
Operation ZMU03115 ZMU03875 Models equipped with trim rods: Once Push the power trim and tilt switch “ ” the outboard motor is supported with the (down) to lower the outboard motor to tilt support lever, press the power trim the desired position. and tilt switch “... -
Page 55: Shallow Water
Operation Slightly tilt the outboard motor up to the EMU28061 Shallow water desired position using the power trim and tilt switch. WARNING! Using the EMU32851 Power trim and tilt models power trim and tilt switch on the bot- The outboard motor can be tilted up partially tom cowling while the boat is moving to allow operation in shallow water. -
Page 56: 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 57: Maintenance
EMU30272 Storing outboard motor ning position, use an additional sup- When storing your Yamaha outboard motor port device to secure it in the tilt for prolonged periods of time (2 months or position. -
Page 58: Procedure
Maintenance drained from it completely, otherwise water may enter the cylinder through the exhaust port and cause engine trou- ble. Store the outboard motor in a dry, well- ● ventilated place, not in direct sunlight. EMU28305 Procedure EMU28323 Flushing with the flushing attachment Flushing with the flushing attachment 1. -
Page 59: Lubrication (Oil Injection Models)
63. Inspect the oil for the pres- ence of water which indicates a leaky seal. Seal replacement should be per- ZMU04697 formed by an authorized Yamaha dealer prior to use. 1. Fitting Grease all grease fittings. For further de- 2. -
Page 60: Cleaning The Outboard Motor
Be sure to perform a maintenance procedure, the connector is tightened securely have a Yamaha dealer or other qualified on the fitting after flushing the en- mechanic do the work. gine. -
Page 61: Severe Operating Conditions
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 62: 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 63 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-...
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Page 64: Maintenance Chart 2
Wire harness connec- Inspection or replace- tions/wire coupler con- ment as necessary nections (Yamaha) Meter/gauge Inspection Fuel tank (Yamaha por- Inspection and clean- table tank) ing as necessary EMU34451 Maintenance chart 2 Every Item Actions... -
Page 65: Greasing
Maintenance EMU28943 Greasing Yamaha grease A (water resistant grease) Yamaha grease D (corrosion resistant grease; for propeller shaft) ZMU03879 Remove the spark plug caps from the EMU28957 Cleaning and adjusting spark plug spark plugs. The spark plug is an important engine com- Remove the spark plug. -
Page 66: 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 67: Checking Water In Engine Oil Tank
9. If you have difficulty verifying the WARNING idle speed, or the idle speed requires ad- You could be seriously injured if the en- justment, consult a Yamaha dealer or gine accidentally starts when you are other qualified mechanic. near the propeller. Before inspecting, re-... -
Page 68: Removing Propeller
Make sure to use a new cotter pin and bend the ends over securely. Otherwise, the propeller could come off during oper- ation and be lost. Apply Yamaha marine grease or a corro- Check the propeller shaft oil seal for dam- ● sion resistant grease to the propeller age. -
Page 69: Changing Gear Oil
Severe injury could case may be damaged. Have a occur if the outboard motor accidental- Yamaha dealer check and repair the ly falls. outboard motor. [ECM00713] TIP:... -
Page 70: Cleaning Fuel Tank
EMU29313 If you have any question about properly ● Inspecting and replacing anode(s) doing this procedure, consult your Yamaha outboard motors are protected from Yamaha dealer. corrosion by sacrificial anodes. Inspect the Keep away from sparks, cigarettes, ● external anodes periodically. Remove scales flames, or other sources of ignition from the surfaces of the anodes. -
Page 71: Checking Battery (For Electric Start Models)
Consult a tery’s charge. If the battery needs charg- Yamaha dealer for inspection and replace- ing, consult your Yamaha dealer. ment of internal anodes attached to the pow- Check the battery connections. They er unit. -
Page 72: Disconnecting The Battery
Maintenance Disconnect the positive cable(s) and re- ECM01124 NOTICE move the battery from the boat. Do not reverse the battery cables. Other- Clean, maintain, and store the battery wise, the electrical parts could be dam- according to the manufacturer’s instruc- aged. -
Page 73: 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 74 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 75 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.
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Page 76: 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 77: Power Trim And Tilt Will Not Operate
2. Fuse (20 A) is in neutral. Otherwise the boat could unexpectedly start to move, which Consult your Yamaha dealer if the new fuse could result in an accident. immediately blows again. Attach the engine shut-off cord to a se- EMU29512 ●... -
Page 78: Emergency Starting Engine
Trouble Recovery 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. You could get an electrical shock. EMU29574 Emergency starting engine Remove the top cowling. -
Page 79: Engine Fails To Operate
Trouble Recovery cedure, see page 73. the following procedure. EMU29671 EWM00410 Engine fails to operate WARNING When starting or operating the engine, do EMU29691 Ignition system malfunction not touch the ignition coil, spark plug If the battery voltage is low or in the unlikely wire, spark plug cap, or other electrical event of an ignition system malfunction, the parts carrying high voltage. -
Page 80: Treatment Of Submerged Motor
Trouble Recovery Open the throttle slightly without shifting running. Do not keep the starter mo- tor turning for more than 5 seconds. If using the throttle grip, neutral throttle le- ver or free accelerator. It is necessary to the starter motor is turned continu- ously for more than 5 seconds, the change the throttle opening slightly de- pending on the engine temperature. - Page 81 Trouble Recovery 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. [ECM00401]...
- Page 82 YAMAHA MOTOR CO., LTD. Printed in Japan March 2010–0.1 1 ! Printed on recycled paper...