Yamaha 90 User Manual Download

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OWNER’S MANUAL

6H1-28199-16

U.S.A.Edition

LIT-18626-06-60

U6H1-9-16 Hyoshi 4/22/05 9:20 AM Page 1

2019 Yamaha Motor Corporation, U.S.A.

Summary of Contents for 90

Page 1: ...90 OWNER S MANUAL 6H1 28199 16 U S A Edition LIT 18626 06 60 U6H1 9 16 Hyoshi 4 22 05 9 20 AM Page 1 2 0 1 9 Y a m a h a M o t o r C o r p o r a t i o n U S A...

Page 2: ...EMU25060 ZMU01690 Read this owner s manual carefully before operating your outboard motor U6H1 9 16 Hyoshi 4 22 05 9 20 AM Page 2 2 0 1 9 Y a m a h a M o t o r C o r p o r a t i o n U S A...

Page 3: ...0 A CAUTION indicates special precautions that must be taken to avoid damage to the outboard motor NOTE A NOTE provides key information to make procedures easier or clearer Yamaha continually seeks ad...

Page 4: ...ler handle 15 Power trim and tilt switch on bottom engine cowling 16 Trim tab with anode 16 Trim rod tilt pin 17 Tilt support lever for power trim and tilt or hydro tilt model 17 Top cowling lock leve...

Page 5: ...leaning fuel filter 51 Inspecting idling speed 52 Checking water in engine oil tank 52 Checking wiring and connectors 53 Exhaust leakage 53 Water leakage 53 Checking power trim and tilt system 53 Chec...

Page 6: ...th the mo tor the key identification number is stamped on your key as shown in the illustration Record this number in the space provided for reference in case you need a new key EMU25221 Emission cont...

Page 7: ...correct use Never operate after drinking alcohol or tak ing drugs About 50 of all boating fatali ties involve intoxication Have an approved personal flotation de vice PFD on board for every occupant I...

Page 8: ...ffic Always watch carefully for swimmers dur ing the engine operation Stay away from swimming areas When a swimmer is in the water near you shift into neutral and shut off the engine Do not illegally...

Page 9: ...r burdened vessel These rules determine which vessel has the right of way and what each vessel should do Stand on vessel The vessel with the right of way has the duty to continue its course and speed...

Page 10: ...risk of collision the vessel which has the oth er on the starboard right side must keep out of the way of the other If the other vessel is on your right you must keep out of its way you are the Give W...

Page 11: ...can navi gate only in such a channel Reading buoys and other markers The waters of the United states are marked for safe navigation by the lateral system of buoyage Simply put buoys and markers have a...

Page 12: ...t smoke when refueling and keep away from sparks flames or other sources of ignition Stop engine before refueling Refuel in a well ventilated area Refuel portable fuel tanks off the boat Take care not...

Page 13: ...amage or engine performance problems EMU25650 Engine oil If the recommended engine oil is not avail able another 2 stroke engine oil with an NMMA certified TC W3 rating may be used EMU25690 Battery re...

Page 14: ...tion NOTE Select a propeller which will allow the engine to reach the middle or upper half of the oper ating range at full throttle with the maximum boat load If operating conditions such as light boa...

Page 15: ...oir and must not be used as a fuel storage container Com mercial users should conform to relevant 1 10 2 13 14 15 16 17 3 4 5 6 7 8 9 12 11 ZMU05244 1 Top cowling 2 Top cowling lock lever 3 Anti cavit...

Page 16: ...shifter and the throttle The electrical switch es are mounted on the remote control box EMU26190 Remote control lever Moving the lever forward from the neutral po sition engages forward gear Pulling t...

Page 17: ...trol lever is in neutral The remote control lever will operate only when the neutral throttle lever is in the closed position EMU25911 Tiller handle To change direction move the tiller handle to the l...

Page 18: ...operation EMU25970 Throttle friction adjuster A friction device provides adjustable resis tance to movement of the throttle grip or the remote control lever and can be set accord ing to operator pref...

Page 19: ...switch lanyard to a secure place on your clothing or your arm or leg while operating Do not attach the lanyard to clothing that could tear loose Do not route the lanyard where it could become entan g...

Page 20: ...rt the en gine When the key is released it returns automatically to the on position EMU26141 Power trim and tilt switch on remote control or tiller handle The power trim and tilt system adjusts the ou...

Page 21: ...E For instructions on using the power trim and tilt switch see page 37 EMU26241 Trim tab with anode The trim tab should be adjusted so that the steering control can be turned to either the right or le...

Page 22: ...ilt support lever to the clamp bracket EMU26372 Top cowling lock lever s turn type To remove the engine top cowling turn the lock lever s and lift off the cowling When in stalling the cowling check to...

Page 23: ...s the engine speed and has the following functions EMU26491 Digital tachometer The tachometer shows the engine speed and has the following functions NOTE All segments of the display will light momen t...

Page 24: ...ator will start to blink For fur ther information see page 21 CAUTION ECM00030 Do not operate the engine without oil Se rious engine damage will occur EMU26581 Overheat warning indicator digital type...

Page 25: ...f hours or the number of hours for the current trip The display can also be turned on and off Changing the display format Pressing the mode button chang es the display format in the following pat tern...

Page 26: ...ted stop the engine and check the cooling water inlet for clogging EMU26845 Oil level warning and oil filter clogging warning Oil injection models This engine has an oil level warning system If the oi...

Page 27: ...ated stop the engine and check for the cause NOTE The warning for oil filter clogging is similar to the warnings for low oil level and overheat ing To make troubleshooting easier check for engine over...

Page 28: ...y It is not possible to provide complete in structions for every possible boat and motor combination Proper mounting depends in part on experience and the specific boat and motor combination WARNING E...

Page 29: ...reaking in engine Your new engine requires a period of break in to allow mating surfaces of moving parts to wear in evenly Correct break in will help en sure proper performance and longer engine life...

Page 30: ...are no fuel leaks or gaso line fumes Check fuel line connections to be sure they are tight if equipped Yamaha fuel tank or boat tank Be sure the fuel tank is positioned on a se cure flat surface and...

Page 31: ...has changed the amount of ad ditives such as aromatics and oxygenates has increased These additives are impor tant for the engines in passenger cars but they can have detrimental effects in marine eng...

Page 32: ...the top cowling counterclockwise and open it 2 Open the oil tank filler cap by pulling the tab on the cap 3 Slowly pour the engine oil into the en gine oil tank 4 After filling replace the all caps s...

Page 33: ...t emits exhaust gases which contain carbon monoxide a col orless odorless gas which could cause brain damage or death when inhaled Symptoms include nausea dizziness and drowsiness Keep cockpit and cab...

Page 34: ...rwise fuel cannot be drawn from the fuel tank 4 Squeeze the primer pump with the outlet end up until you feel it become firm EMU27490 Starting engine EMU27592 Electric start prime start models 1 Place...

Page 35: ...to start and hold it for a maximum of 5 seconds 5 Immediately after the engine starts re lease the main switch and allow it to re turn to on CAUTION ECM00191 Never turn the main switch to start while...

Page 36: ...g normal operation Loss of en gine 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 forw...

Page 37: ...sages If water is not flowing out of the hole at all times while the engine is running overheating and serious dam age could occur Stop the engine and check whether the cooling water inlet on the lowe...

Page 38: ...wise the boat could become unstable which could result in loss of control and an accident Tiller control models 1 Place the throttle grip in the fully closed position 2 Move the gear shift lever quick...

Page 39: ...The engine can also be stopped by pulling the lanyard and removing the lock plate from the engine stop switch then turning the main switch to off EMU27861 Trimming outboard motor The trim angle of the...

Page 40: ...rd motor when adjusting the tilt an gle also be careful not to pinch any body parts between the drive unit and clamp bracket Use caution when trying a trim position for the first time Increase speed g...

Page 41: ...be adjusted to help offset this effect When the bow of the boat is down it is easier to accelerate from a standing start onto plane Bow Up Too much trim out puts the bow of the boat too high in the wa...

Page 42: ...eaking fuel is a fire hazard If there is a fuel joint on the outboard motor discon nect the fuel line or close the fuel cock if the engine will be tilted for more than a few minutes Otherwise fuel may...

Page 43: ...ith the tilt support knob or tilt support lever Otherwise the outboard motor could fall back down suddenly if oil in the power trim and tilt unit loses pres sure 5 Models equipped with trim rods Once...

Page 44: ...pport knob becomes free 2 Release the tilt support lever or pull out the tilt support knob 3 Push the power tilt power trim and tilt switch down to lower the outboard motor to the desired position EMU...

Page 45: ...wise severe damage from overheat ing can result EMU28184 Procedure for power trim and tilt power tilt models 1 Place the gear shift lever in neutral 2 Slightly tilt the outboard motor up to the desire...

Page 46: ...lushing instructions see page 43 Cruising in turbid water Yamaha strongly recommends that you use the optional chromium plated water pump kit not available for some models if you use the outboard moto...

Page 47: ...tem Remote control Starting system Electric Starting carburetion system Prime start Min cold cranking amps CCA SAE 380 0 A Min marine cranking amps MCA ABYC 502 0 A Min reserve capacity RC SAE 124 min...

Page 48: ...tor in the tilt po sition using a motor support device such as a transom saver bar Consult your Yamaha dealer for further details EMU30272 Storing outboard motor When storing your Yamaha outboard moto...

Page 49: ...l position while supply ing fresh water 7 Just prior to turning off the engine quick ly spray Yamaha Stor Rite Engine Fog ging Oil Part No LUB STRRT 12 00 alternately into each carburetor each in take...

Page 50: ...tteries in a well ventilated ar ea Keep batteries away from fire sparks or open flames for example welding equipment lighted cigarettes and so on DO NOT SMOKE when charging or han dling batteries KEEP...

Page 51: ...e the connector is tightened securely on the fit ting after flushing the engine NOTE When flushing the engine with the boat in the water tilting up the outboard motor un til it is completely out of th...

Page 52: ...control system must be performed by an authorized Yamaha marine dealership A service manual is available for purchase through your Yamaha dealer for owners who have the mechanical skills tools and oth...

Page 53: ...s Initial Every 10 hours 1 month 50 hours 3 months 100 hours 6 months 200 hours 1 year Anode s external Inspection replace ment Anode s internal Inspection replace ment Battery Inspection charging Coo...

Page 54: ...pection adjustment Water pump Inspection replace ment Oil pump Inspection adjustment Oil tank water drain Inspection cleaning Spark plug s Cleaning adjustment replacement Item Actions Initial Every 10...

Page 55: ...or if carbon and other deposits are excessive you should re place the spark plug with another of the cor rect type Before fitting the spark plug measure the electrode gap with a wire thickness gauge a...

Page 56: ...a pors are flammable and explosive If you have any question about properly doing this procedure consult your Yamaha dealer Do not perform this procedure on a hot or running engine Allow the engine to...

Page 57: ...utboard motor is in the water A flushing attachment or test tank can be used A diagnostic tachometer should be used for this procedure Results may vary depending on whether testing is conducted with t...

Page 58: ...accidentally falls Make sure no one is under the outboard motor before performing this test 1 Check the power trim and tilt unit for any sign of oil leaks 2 Operate each of the power trim and tilt sw...

Page 59: ...he shift control in neutral turn the main switch to off and re move the key and remove the lanyard from the engine stop switch Turn off the battery cut off switch if your boat has one Do not use your...

Page 60: ...ower case and propeller boss could be damaged Be sure to use a new cotter pin and bend the ends over securely Otherwise the propeller could come off during op eration and be lost 1 Apply Yamaha marine...

Page 61: ...ing it 4 Remove the oil level plug to allow the oil to drain completely CAUTION ECM00710 Inspect the used oil after it has been drained If the oil is milky water is getting into the gear case which ca...

Page 62: ...ak which could result in a fire or ex plosion hazard Dispose of old gasoline according to lo cal regulations 1 Empty the fuel tank into an approved container 2 Pour a small amount of suitable solvent...

Page 63: ...ytic fluid as it can cause severe burns or permanent eye injury Wear protective eye gear when han dling or working near batteries Antidote EXTERNAL SKIN Flush with water EYES Flush with water for 15 m...

Page 64: ...29331 Connecting the battery WARNING EWM00570 Mount the battery holder securely in a dry well ventilated vibration free loca tion in the boat Install a fully charged bat tery in the holder CAUTION ECM...

Page 65: ...ull improves boat performance The boat bottom should be kept as clean of ma rine growth as possible If necessary the boat bottom can be coated with an anti foul ing paint approved for your area to inh...

Page 66: ...aler Q Is shift lever in gear A Shift to neutral Engine will not start starter operates Q Is fuel tank empty A Fill tank with clean fresh fuel Q Is fuel contaminated or stale A Fill tank with clean fr...

Page 67: ...Yamaha dealer Q Is air vent screw on fuel tank closed A Open air vent screw Q Is choke knob pulled out A Return to home position Q Is motor angle too high A Return to normal operating position Q Is c...

Page 68: ...ect spark plug s Clean or replace with recommended type Q Are weeds or other foreign matter tangled on gear housing A Remove foreign matter and clean lower unit Q Is fuel system obstructed A Check for...

Page 69: ...emergency EMU29440 Impact damage WARNING EWM00870 The outboard motor can be seriously damaged by a collision while operating or trailering Damage could make the out board motor unsafe to operate If t...

Page 70: ...does not oper ate Make sure the remote control lever is in neutral Otherwise the boat could unexpectedly start to move which could result in an accident Attach the engine stop switch lanyard to a sec...

Page 71: ...cover after removing the bolt s 4 Prepare the engine for starting For fur ther information see page 29 Be sure the engine is in neutral and that the en gine stop switch lanyard lock plate is at tached...

Page 72: ...llow this procedure only in an emer gency and just long enough to return to port for repairs EMU29704 Cold engine fails to start If the engine fails to start when it is cold use the following procedur...

Page 73: ...while the engine is running Do not keep the starter motor turning for more than 5 seconds If the starter motor is turned continuously for more than 5 seconds the battery will be quickly discharged th...

Page 74: ...alt sea weed and so on with fresh water 2 Remove the spark plugs and face the spark plug holes downward to allow any water mud or contaminants to drain 3 Drain the fuel from the carburetor fuel filter...

Page 75: ...70 Consumer information EMU29811 Important warranty information for U S A and Canada 2 0 1 9 Y a m a h a M o t o r C o r p o r a t i o n U S A...

Page 76: ...Consumer information 71 2 0 1 9 Y a m a h a M o t o r C o r p o r a t i o n U S A...

Page 77: ...Consumer information 72 EMU29820 YAMAHA MOTOR CORPORATION U S A OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY 2 0 1 9 Y a m a h a M o t o r C o r p o r a t i o n U S A...

Page 78: ...Consumer information 73 2 0 1 9 Y a m a h a M o t o r C o r p o r a t i o n U S A...

Page 79: ...Consumer information 74 2 0 1 9 Y a m a h a M o t o r C o r p o r a t i o n U S A...

Page 80: ...Consumer information 75 EMU29841 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA 2 0 1 9 Y a m a h a M o t o r C o r p o r a t i o n U S A...

Page 81: ...Printed in Japan May 2005 0 9 1 Printed on raecycled paper U6H1 9 16 Hyoshi 4 22 05 9 20 AM Page 4 2 0 1 9 Y a m a h a M o t o r C o r p o r a t i o n U S A...

Page 82: ...ND SERIAL NUMBER From I D label on clamp bracket MOD LE ET NO DE S RIE DU MOTEUR HORS BORD sur l tiquette d identification de la presse de fixation For Dealer Use Only A l usage du concessionnaire YAM...

Page 83: ...PLACE POSTAGE HERE ATTN WARRANTY DEPARTMENT Warranty card 04 2 17 03 2 41 PM Page 2 2 0 1 9 Y a m a h a M o t o r C o r p o r a t i o n U S A...

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