Yamaha F250B Owner'S Manual Download

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General information

EMU25190

Key number

If a main key switch is equipped with 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.

1. Digital electronic control serial number loca-

tion

ZMU05958

1. Key number

U6BR11E0.book Page 10 Friday, June 13, 2008 3:43 PM

2019 Yamaha Motor Corporation, U.S.A.

Summary of Contents for F250B

Page 1: ...F250B LF250B OWNER S MANUAL LIT 18626 08 18 6BR 28199 11 U S A Edition Read this manual carefully before operating this outboard motor DIC183 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: ...ing 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 U6BR11E0 book Page 1 Friday June 13 2008 3 43 PM 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: ...ial precautions that must be taken to avoid damage to the outboard motor or other property TIP A TIP provides key information to make pro cedures easier or clearer Yamaha continually seeks advancements in product design and quality Therefore while this manual contains the most current product information available at the time of printing there may be minor discrepancies between your machine and th...

Page 4: ...power rating 15 Mounting motor 15 Digital electronic control requirements 15 Battery requirements 16 Specifications of Battery 16 Mounting battery 16 Multiple batteries 16 Propeller selection 16 Counter rotation models 17 Start in gear protection 17 Engine oil requirements 17 Fuel requirements 18 Gasoline 18 Ring Free Fuel Additive 18 Muddy or acidic water 19 Anti fouling paint 19 Motor disposal r...

Page 5: ...ore starting engine 53 Fuel level 54 Remove cowling 54 Fuel system 54 Controls 55 Engine shut off cord lanyard 55 Engine oil 56 Engine 56 Flushing device 56 Install cowling 57 Checking power trim and tilt system 58 Battery 59 Filling fuel 59 Operating engine 59 Priming fuel system 59 Change of station 59 Starting engine 60 Checks after starting engine 64 Cooling water 64 Warming up engine 65 Elect...

Page 6: ...ler 95 Changing gear oil 96 Inspecting and replacing anode s 98 Checking battery for electric start models 98 Connecting the battery 99 Disconnecting the battery 101 Trouble Recovery 102 Troubleshooting 102 Temporary action in emergency 105 Impact damage 105 Running in an emergency twin engines or triple engines 105 Replacing fuse 106 Power trim and tilt will not operate 107 Water separator alert ...

Page 7: ... in this area before operating the power trim and tilt mech anism The power trim and tilt switches operate even when the main switch is off Keep people be away from the switches whenever working around the motor Never get under the lower unit while it is tilted even when the tilt support lever is locked Se vere injury could occur if the outboard motor accidentally falls EMU33671 Engine shut off co...

Page 8: ...30 People in the water Always watch carefully for people in the wa ter such as swimmers skiers or divers whenever the engine is running When some one is in the water near the boat shift into neutral and shut off the motor Stay away from swimming areas Swimmers can be hard to see The propeller can keep moving even when the motor is in neutral Shut off the engine when a person is in the water near y...

Page 9: ... a boat Contact local law enforcement personnel if a report is necessary EMU33870 Boat education and training Operators should take a boating safety course This may be required in your state Many of the organizations listed in the next section can provide information about cours es in your area You may also want to consider an Internet based program for basic boater education The Online Boating Sa...

Page 10: ...AT 1 800 336 2628 www boatus com National Association of State Boating Law Administrators NASBLA 1500 Leestown Road Suite 330 Lexington KY 4051 859 225 9497 859 225 9497 www nasbla org National Marine Manufacturers Associa tion NMMA 200 East Randolph Drive Suite 5100 Chicago IL 606001 www nmma org Marine Retailers Association of America 155 N Michigan Ave Chicago IL 60601 www mraa com EMU33690 Bas...

Page 11: ... when a collision will occur unless both vessels try to avoid each other If that is the case both vessels become Give Way ves sels EMU25521 Rules when encountering vessels There are three main situations that you may encounter with other vessels which could lead to a collision unless the Steering Rules are fol lowed Meeting you are approaching another ves sel head on Crossing you are traveling acr...

Page 12: ...no reply is heard however the vessel should still pro ceed around the bend with caution If you nav igate such waters with your boat you will need to carry a portable air horn available from local marine supply stores Fishing vessel right of way All vessels that are fishing with nets lines or trawls are considered to be fishing vessels under the International Rules Vessels with trolling lines are n...

Page 13: ...ate The Uniform State Waterway Marking System has been devised for these waters This system uses buoys and signs with dis tinctive shapes and colors to show regulatory or advisory information These markers are white with black letters and orange boarders They signify speed zones restricted areas danger areas and general information Remember markings may vary by geograph ic location Always consult ...

Page 14: ...Safety information 8 ZMU01708 U6BR11E0 book Page 8 Friday June 13 2008 3 43 PM 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 15: ... stamped on the label attached to the digital electronic control box Record your digital electronic control serial number in the spaces provided to assist you in newly connecting the digital electronic con trol to the outboard motor TIP Consult your Yamaha dealer if you have any questions concerning the digital electronic control serial number 1 Outboard motor serial number location 1 Digital elec...

Page 16: ...er 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 1 Digital electronic control serial number loca tion ZMU05958 1 1 Key number U6BR11E0 book Page 10 Friday June 13 2008 3 43 PM 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 17: ... 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 F250B LF250B U6BR11E0 book Page 11 Friday June 13 2008 3 43 PM 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 18: ...3850 Other labels EMU35132 Symbols The following symbols mean as follows Notice Warning 1 2 ZMU05741 3 ZMU05710 ZMU05696 U6BR11E0 book Page 12 Friday June 13 2008 3 43 PM 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 19: ...tion 13 Read Owner s Manual Hazard caused by continuous rotation Electrical hazard ZMU05664 ZMU05665 ZMU05666 U6BR11E0 book Page 13 Friday June 13 2008 3 43 PM 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 20: ...ing range 5000 6000 r min Maximum output 183 9 kW 5500 r min 250 HP 5500 r min Idling speed in neutral 650 50 r min Engine Type 4 stroke V Displacement 3352 0 cm Bore stroke 94 0 80 5 mm 3 70 3 17 in Ignition system TCI Spark plug NGK LFR6A 11 Spark plug gap 1 0 1 1 mm 0 039 0 043 in Control system Remote control Starting system Electric Starting carburetion system Electronic fuel injection Valve ...

Page 21: ... boat can cause severe in stability Before installing the outboard motor s con firm that the total horsepower of your motor s does not exceed the boats maximum horse power rating See the boat s capacity plate or contact the manufacturer EMU33571 Mounting motor WARNING EWM01570 Improper mounting of the outboard mo tor could result in hazardous conditions such as poor handling loss of control or fir...

Page 22: ...erloaded causing electric system dam age EMU36290 Mounting battery Mount the battery holder securely in a dry well ventilated vibration free location in the boat WARNING Do not put flammable items or loose heavy or metal objects in the same compartment as the battery Fire explosion or sparks could result EWM01820 EMU36300 Multiple batteries To connect multiple batteries such as for mul tiple engin...

Page 23: ... propeller with a stan dard motor Otherwise the boat could go in the direction opposite of that expected for example reverse instead of forward which could lead to an accident EWM01810 For instructions on propeller removal and in stallation see page 95 and 95 EMU35140 Start in gear protection Yamaha outboard motors or Yamaha ap proved digital electronic control units are equipped with start in gea...

Page 24: ...s fuel tank and outboard motor when using ethanol Eth anol is known to allow moisture to be ab sorbed into boat fuel tanks and systems Moisture in the fuel can cause corrosion of metallic fuel system components starting and running complaints and require additional fuel system maintenance EMU27270 Ring Free Fuel Additive Gasoline is a precise blend of many different substances each chosen to give ...

Page 25: ...te These paints can cause more rapid engine corrosion EMU36341 Motor disposal requirements Never illegally discard dump the motor Yamaha recommends consulting the dealer about discarding the motor EMU36351 Emergency equipment Keep the following items onboard in case there is trouble with the motor A tool kit with assorted screwdrivers pliers wrenches including metric sizes and electrical tape Wate...

Page 26: ...tandards Engines meeting these standards have 75 lower emissions than conventional carbureted two stroke en gines These engines are equivalent to the U S EPA s 2006 standards for marine en gines EMU25290 Two Stars Very Low Emission The two star label identifies engines that meet the Air Resources Board s 2004 exhaust emission standards Engines meeting these standards have 20 lower emissions than O...

Page 27: ...ur Stars Super Ultra Low Emission The four star label identifies engines that meet the Air Resources Board s Sterndrive and Inboard marine engine 2009 exhaust emission standards Personal Watercraft and Outboard marine engines may also comply with these standards Engines meeting these standards have 90 lower emissions than One Star Low Emission engines ZMU01703 ZMU01704 ZMU05663 U6BR11E0 book Page ...

Page 28: ...0B ZMU06243 10 9 11 1 Top cowling 2 Anti cavitation plate 3 Trim tab anode 4 Propeller 5 Cooling water inlet 6 Clamp bracket 7 Top cowling lock lever s 8 Water separator 9 Flushing device 10 Tilt support lever 11 Power trim and tilt switch U6BR11E0 book Page 22 Friday June 13 2008 3 43 PM 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 29: ...ne shut off switch 4 Switch panel for use with side mount type 5 Digital electronic control single type 6 Switch panel for use with single type 7 Digital electronic control twin type 8 Switch panel for use with twin type U6BR11E0 book Page 23 Friday June 13 2008 3 43 PM 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 30: ... with single type 3 Digital electronic control twin type 4 Switch panel for use with twin type 5 Clip 6 Engine shut off switch 7 Digital electronic control triple type 8 Switch panel for use with triple type 9 Station selector switch panel U6BR11E0 book Page 24 Friday June 13 2008 3 43 PM 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 31: ...with single type 3 Digital electronic control twin type 4 Switch panel for use with twin type 5 Clip 6 Engine shut off switch 7 Digital electronic control triple type 8 Switch panel for use with triple type 9 Station selector switch panel U6BR11E0 book Page 25 Friday June 13 2008 3 43 PM 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 32: ...MU05429 1 Tachometer unit Square type 2 Tachometer unit Round type 3 Speedometer unit Square type 4 Speed fuel meter unit Square type 5 Speed fuel meter unit Round type 6 Fuel management meter Square type 1 Control lever 2 Neutral interlock trigger 3 Digital electronic control alert indicator 4 Digital electronic control active indicator 5 Free throttle switch 6 Clip 7 Engine shut off switch 8 Thr...

Page 33: ...tal electronic control active indicator 3 Digital electronic control alert indicator 4 Free throttle switch 5 Throttle friction adjuster 6 Power trim and tilt switch ZMU05850 1 6 5 4 2 3 ZMU05851 1 6 5 4 3 2 1 Control lever 2 Digital electronic control active indicator 3 Digital electronic control alert indicator 4 Free throttle switch 5 Throttle friction adjuster 6 Power trim and tilt switch 7 En...

Page 34: ...hts when trouble occurs in the connection between the digital electronic control and out board motor Consult your Yamaha dealer for details 1 Digital electronic control active indicator 1 Digital electronic control active indicator 1 Digital electronic control active indicator 1 ZMU05888 1 ZMU05890 1 ZMU05966 1 Digital electronic control alert indicator 1 Digital electronic control alert indicator...

Page 35: ... portside engine speed The functions of the control lever for triple type digital electronic control are as follows Operate the port side engine using the port side control lever The center engine runs at the average speed of port side and starboard side en gines speeds Operate the starboard side engine using the starboard side control lever EMU26201 Neutral interlock trigger To shift out of neutr...

Page 36: ...n or close the throttle This can also be done when the control lever is set in reverse Single type Single type Twin type 1 Neutral interlock trigger 1 Fully open ZMU06285 1 ZMU06231 N F ZMU06232 N 2 22 5 3 1 2 Fully closed 3 Free accelerator 1 Fully open 2 Fully closed 3 Free accelerator ZMU05880 F N ZMU05881 N 1 2 3 22 5 ZMU05882 N F U6BR11E0 book Page 30 Friday June 13 2008 3 43 PM 2 0 1 9 Y a m...

Page 37: ...orward and reverse normal ly EMU35871 Throttle friction adjuster A friction device provides adjustable resis tance to movement of the control lever and can be set according to operator preference To increase resistance turn the adjuster clockwise To decrease resistance turn the adjuster counterclockwise WARNING EWM01770 If the friction is too small the control le ver could move freely and cause an...

Page 38: ...an be operated at both the main station and sub station when the main switch is set to on EMU35720 Engine selector switch When all engines have started you can select the desired engine for operation by pushing the engine selector switch The engine selec tor switch works only when all the control le vers are in neutral EMU35772 Engine shut off cord lanyard and clip The clip must be attached to the...

Page 39: ...entally 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 TIP The engine cannot be started with the clip re moved Main station 1 Cord 2 Clip 3 Engine shut off switch ZMU06235 1 3 2 1 Cord 2 Clip 3 Engine shut off switch 1 Co...

Page 40: ...its are on and the key can not be removed start With the main switch in the start po sition the starter motor turns to start the en gine When the key is released it returns automatically to the on position Single type 1 Cord 2 Clip 3 Engine shut off switch 1 Cord 2 Clip 3 Engine shut off switch 1 Cord 2 Clip 3 Engine shut off switch 1 2 3 ZMU05979 1 2 3 ZMU05980 1 2 3 ZMU05981 ZMU06245 ON OFF STAR...

Page 41: ...e type Twin type Triple type EMU35740 Engine stop button To stop the engine push the red button Only equipped on the sub station Single type ON OFF START ON OFF START ZMU05821 ON OFF START ON OFF START ON OFF START ZMU05982 ZMU05983 ZMU05984 ZMU05985 ZMU05986 U6BR11E0 book Page 35 Friday June 13 2008 3 43 PM 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 42: ...ing The power trim and tilt switch is located on the side of the bottom engine cowling Pressing the switch up trims the outboard motor up and then tilts it up Pressing the switch down tilts the outboard motor down and trims it down When the switch is released the outboard motor will stop in its current po sition For instructions on using the power trim and tilt switch see page 77 WARNING EWM01030 ...

Page 43: ...uctions on using the power trim and tilt switches see pages 74 and 77 EMU26244 Trim tab with anode WARNING EWM00840 An improperly adjusted trim tab could cause difficult steering Always test run af ter the trim tab has been installed or re placed to be sure steering is correct Be sure you have tightened the bolt after ad justing the trim tab The trim tab should be adjusted so that the steering con...

Page 44: ...boat The outboard mo tor could shake loose from the tilt support and fall If the motor cannot be trailered in the normal running position use an addi tional support device to secure it in the tilt position EMU31420 Top cowling lock lever pull up type To remove the top cowling pull up the lock le ver s and lift off the cowling To install the top cowling place it in its original position and then mo...

Page 45: ...and tap water TIP For details on usage see page 84 EMU33462 Fuel filter Water separator This engine has a combination fuel filter water separator and associated alert system If wa ter separated from the fuel exceeds a specific volume the alert device of Command Link Ta chometer will activate Activation of alert device The water separator alert indicator of Com mand Link Tachometer will blink 1 Top...

Page 46: ...Yamaha dealer imme diately TIP Adding an in line 10 micron fuel filter has been show to greatly reduce the chance of fuel contamination problems Consult your dealer for information about Yamaha 10 mi cron fuel filters if your boat does not have one U6BR11E0 book Page 40 Friday June 13 2008 3 43 PM 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 47: ...ery voltage display total hour trip hour display oil pressure dis play water detection alert engine trouble alert and periodic maintenance notification If the cooling water pressure sensor is installed the unit can also show the cooling water pres sure display However even if the cooling wa ter pressure sensor is not installed the cooling water pressure display can be shown by connecting an option...

Page 48: ...ected by currents and other operating conditions and may differ from the actual engine speed The default engine idle speed is reset auto matically when the display is switched to the normal display The default engine idle speed is also reset automatically when the engine is turned off or when the engine speed exceeds 3000 r min When warming up a cold engine the trolling speed cannot be decreased b...

Page 49: ...tically decrease to about 2000 r min Stop the engine immediately if the buzzer sounds and the overheat alert device has ac tivated Check the cooling water inlet for clog ging NOTICE ECM01592 Do not continue to run the engine if the overheat alert indicator blinks Serious engine damage will occur Do not continue to operate the engine if a alert device has activated Consult your Yamaha dealer if the...

Page 50: ...ealer immediately NOTICE ECM00920 In such an event the engine will not oper ate properly Consult a Yamaha dealer im mediately EMU36170 Low battery voltage alert If the battery voltage drops the low battery voltage alert indicator and the battery voltage value will start to blink Get back to the port soon if the low battery voltage alert device has activated For charging the battery con sult your Y...

Page 51: ...ition if optional sensors are connected to the unit water surface temperature display depth display and clock will also be available For the optional sensors consult your Yamaha dealer The speed fuel meter unit is available in round or square types Check your speed fuel meter unit type for operation information After the main switch is first turned on all the displays come on as a test After a few...

Page 52: ...d clock will also be available For the optional sen sors consult your Yamaha dealer After the main switch is first turned on all the displays come on as a test After a few sec onds the gauge will change to normal opera tion For more information see the operation man ual originally supplied with the meter EMU31632 Command link multifunction fuel management meters The fuel management meter has the f...

Page 53: ... on all the displays come on as a test After a few sec onds the gauge will change to normal opera tion For more information see the operation man ual originally supplied with the meter 1 Set button 2 Mode button 1 Fuel flow meter 2 Multifunction display 2 1 ZMU05438 1 2 ZMU05439 U6BR11E0 book Page 47 Friday June 13 2008 3 43 PM 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 54: ...e port soon and have a Yamaha dealer inspect or repair the outboard motor EMU35015 Overheat alert This engine has an overheat alert device If the engine temperature rises too high the alert device will activate The engine speed will automatically de crease to about 2000 r min The overheat alert indicator of the Com mand Link tachometer will light or blink 1 Digital electronic control alert indicat...

Page 55: ...tation Sub station ZMU05422 ZMU06297 ZMU04583 OFF START ON ON OFF START ZMU05827 ON OFF START ON OFF START ON OFF START ZMU05989 ZMU05990 ZMU05991 U6BR11E0 book Page 49 Friday June 13 2008 3 43 PM 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 56: ...t If the oil pressure drops too low the alert de vice will activate The engine speed will automatically de crease to about 2000 r min The low oil pressure alert indicator will light or blink The buzzer will sound in the same way as during an overheating alert If the alert device has activated stop the en gine as soon as it is safe to do so Check the oil level and add oil as needed If the oil level...

Page 57: ...he boat is well balanced Otherwise the boat could be hard to steer For single engine boats mount the outboard motor on the cen terline keel line of the boat For twin engine boats mount the outboard motors equidistant from the centerline For triple engine boats mount the center out board motor on the centerline keel line and the port side and starboard side outboard mo tors equidistant from the cen...

Page 58: ... mounting height NOTICE ECM01631 Check that the idle hole stays high enough to keep out water getting inside engine even if the boat is in stationary with 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 air borne water spray while the boat is c...

Page 59: ... procedure could result in reduced engine life or even severe engine damage Run the engine in the water under load in gear with a propeller installed as follows For ten hours for breaking in en gine avoid extended idling rough water and crowded areas 1 For the first hour of operation Run the engine at varying speeds up to 2000 r min or approximately half throttle 2 For the second hour of operation...

Page 60: ...e and explosive Keep away from sparks cigarettes flames or other sourc es of ignition WARNING EWM00910 Leaking fuel can result in fire or explosion Check for fuel leakage regularly If any fuel leakage is found the fuel sys tem must be repaired by a qualified me chanic Improper repairs can make the outboard unsafe to operate EMU36450 Check for fuel leaks Check under top cowling and in the boat for ...

Page 61: ...completely to the idle po sition EMU36922 Engine shut off cord lanyard Inspect the engine shut off cord for damage such as cuts breaks and wear Single type Single type Twin type 1 Cord 2 Clip 3 Engine shut off switch 1 Cord 2 Clip ZMU06235 1 3 2 ZMU04565 1 2 3 3 Engine shut off switch 1 Cord 2 Clip 3 Engine shut off switch 1 Cord 2 Clip 3 Engine shut off switch 1 Cord 2 Clip 3 Engine shut off swit...

Page 62: ...v el mark and lower level mark Consult your Yamaha dealer if the oil lev el is out of specified level or if it appears milky or dirty EMU27151 Engine Check the engine and engine mounting Look for loose or damaged fasteners Check the propeller for damage Check for oil leaks EMU36490 Flushing device Check that flushing device s garden hose connector is securely screwed on to the fitting on the botto...

Page 63: ... properly in the rub ber seal 5 Move the levers to lock the cowling as shown NOTICE If the cowling is not installed correctly water spray under the cowling can damage the engine or the cowling can blow off at high speeds ECM01990 After installing check the fitting of the top cowling by pushing it with both hands If the top cowling is loose have it repaired by your Yamaha dealer 1 Fitting 2 Flushin...

Page 64: ...rol and engine bottom cowling if equipped to check that all switches work 3 Tilt the outboard motor up and check that the tilt rod and trim rods are extended completely 4 Use the tilt support lever to lock the motor in the up position Operate the tilt down switch briefly so the motor is supported by the tilt support lever 5 Check that the tilt rod and trim rods are free of corrosion or other flaws...

Page 65: ...l ered 3 Make sure no one is in the boat 4 Do not smoke and keep away from sparks flames static electric discharge or other sources of ignition 5 If you use a portable container to store and dispense fuel only use a locally ap proved GASOLINE container 6 Touch the fuel nozzle to the filler opening or funnel to help prevent electrostatic sparks 7 Fill the fuel tank but do not overfill Fuel can expa...

Page 66: ...or leg while operating Do not attach the cord to clothing that could tear loose Do not route the cord where it could become entangled 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 throw...

Page 67: ...lights TIP When the main switch is turned to on with the clip removed from the engine shut off switch the buzzer will sound 4 Turn the main switch to start and hold it for a maximum of 5 seconds ZMU06237 ZMU04628 ON START OFF ON START OFF ZMU05828 ZMU05993 ZMU06246 ON START ON START ZMU04596 U6BR11E0 book Page 61 Friday June 13 2008 3 43 PM 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 68: ... gear protection device prevents the engine from starting except when in neu tral 2 Turn the main switch on to make sure that the digital electronic control ac tive indicator lights The engine can not be started when the digital electronic con trol alert indicator lights 3 The procedure until starting the engine is the same as that of the single station models NOTICE Never turn the main switch to ...

Page 69: ...he 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 1 Turn the main switch of the main station to on to make sure that the digital electronic control active indicator lights The engine can not be started when the digital electronic control alert indicator lights 2 Place the control lever in neut...

Page 70: ...top the en gine However it cannot operate the digital electronic control EMU36510 Checks after starting engine EMU36520 Cooling water Check for a steady flow of water from the cool ing water pilot hole A continuous flow of water from the pilot hole shows that the water pump is pumping water through the cooling passag es If the cooling passages are frozen it may take a while for water to start flow...

Page 71: ...ne stop button and make sure the en gine stops Confirm that removing the clip from the en gine shut off switch stops the engine Confirm that the engine cannot be started with the clip removed from the engine shut off switch EMU35880 Selecting outboard motor tri ple engine After all engines have started set all control levers to Neutral Push the engine selector switch repeatedly to change the digit...

Page 72: ...ontrol lever The center engine runs at the idling speed Operate the starboard side engine us ing the starboard side control lever 3 Push the engine selector switch twice to operate the center engine The port side engine runs at the idling speed Operate the center engine using the port side control lever The starboard side engine runs at the idling speed 4 Push the engine selector switch three time...

Page 73: ...possible As a re sult for quick gear shifting there could be a time lag when the gear is shifted until the en gine speed has decreased sufficiently To shift out of neutral 1 Pull the neutral interlock trigger up if equipped 2 Move the control lever firmly and crisply forward for forward gear or backward for reverse gear 22 5 a detent can felt To shift from in gear forward reverse to neu tral 1 Clo...

Page 74: ...not shift into reverse while traveling at planing speeds Loss of control boat swamping or damage to the boat could occur The boat is not equipped with a separate braking system Water resistance stops it af ter the throttle lever is moved back to idle The stopping distance varies depending on gross weight water surface conditions and wind di rection EMU35890 Operating the port center starboard engi...

Page 75: ... port side and starboard side engines speeds Operate the starboard side engine using the starboard side control lever Operating the port side engine and star board side engine Operate the port side engine using the port side control lever 1 Port side control lever 2 Starboard side control lever 3 Port side engine 4 Center engine 5 Starboard side engine ZMU06003 P C S 1 2 3 5 4 ZMU05999 ON ON ON ZM...

Page 76: ... lever Operating the center engine and starboard side engine Operate the center engine using the port side control lever Operate the starboard side engine using the starboard side control lever Operating the center engine Operate the center engine using the port side control lever ZMU06006 ON ON ZMU06007 ZMU06008 ON ON ZMU06009 ZMU06002 ON ZMU06010 U6BR11E0 book Page 70 Friday June 13 2008 3 43 PM...

Page 77: ...ort side engine center engine and starboard side engine Boat direction and turning force The size of the arrow is proportional to the turning force Propulsion P C S P C S P C S P C S P C S P C S P C S P C S P C S P C S P C S P C S ZMU06011 U6BR11E0 book Page 71 Friday June 13 2008 3 43 PM 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: ...ction and turning force The size of the arrow is proportional to the turning force Propulsion P C S P C S P C S P C S P C S P C S P C S P C S P C S P C S P C S P C S ZMU06012 U6BR11E0 book Page 72 Friday June 13 2008 3 43 PM 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: ...cool off for a few minutes at idle or low speed Stop ping the engine immediately after operating at high speed is not recommended EMU35801 Procedure for single station models 1 Turn the main switch to off P C S P C S P C S P C S ZMU06013 ZMU06247 ON OFF START ON OFF START ZMU04599 OFF OFF ON ON ZMU05833 U6BR11E0 book Page 73 Friday June 13 2008 3 43 PM 2 0 1 9 Y a m a h a M o t o r C o r p o r a t...

Page 80: ...ing the main switch to off EMU35910 Procedure for dual station models sub station Push and hold the red engine stop button until the engine comes to a complete stop When the engine has been stopped from the sub station be sure to turn the main switch on the main station to TIP The engine can also be stopped by pulling the engine shut off cord and removing the clip from the engine shut off switch E...

Page 81: ...r of the out board motor when adjusting the trim an gle Body parts can be crushed between 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 instability or control problems Improper trim an gle can cause loss of control If equipped with a power trim and tilt switch locat...

Page 82: ...ab can also 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 water Performance and econ omy are decreased because the hull of the boat is pushing the water and there is more air drag Excessive trim out can also cause the propeller to ventilate which r...

Page 83: ... cor rosion WARNING EWM01541 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 mo tor is trimmed or tilted NOTICE ECM00991 Before tilting the outboard motor follow the procedure under Stopping engine in this chapter Never tilt the outboard motor while the engine is running Se vere damage from over...

Page 84: ...m and tilt unit or in the power tilt unit loses pressure EWM00262 NOTICE Do not use the tilt support le ver or knob when trailering the boat The outboard motor could shake loose from the tilt support and fall If the motor cannot be trailered in the normal running position use an addi tional support device to secure it in the tilt position For more detailed in formation see page 83 ECM01641 ZMU0628...

Page 85: ...EMU35513 Procedure for tilting down power trim and tilt models 1 The main switch must be on for the power trim and tilt switch on the digital electronic control to operate 2 Push the power trim and tilt switch up until the outboard motor is supported by the tilt rod and the tilt support lever be comes free 3 Release the tilt support lever 4 Push the power trim and tilt switch down to lower the out...

Page 86: ...uld be damaged Do not tilt the outboard motor up so that the cooling water inlet on the lower unit is above the surface of the water when setting up for and cruising in shallow water Otherwise severe damage from overheating can result EMU35234 Procedure for power trim and tilt models 1 Place the control lever in neutral ZMU05840 DN DN DN ZMU05841 DN DN ZMU06021 ZMU06236 N ZMU05829 N U6BR11E0 book ...

Page 87: ... another boat or an ob stacle EWM01850 3 To return the outboard motor to the nor mal running position press the power trim and tilt switch and slowly tilt the out board motor down EMU28194 Cruising in other conditions Cruising in salt water After operating in salt water flush the cooling water passages with fresh water to prevent them from becoming clogged Also rinse the ZMU06280 UP ZMU05837 UP UP...

Page 88: ...lated water pump kit see page 19 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 Af ter operating in such water flush the cooling passages with fresh water to prevent corro sion Also rinse the outside of the outboard motor with fresh water U6BR11E0 book Page 82 Friday June 13 2008 3 43 PM 2 0 1 9 Y a m a h a M o t o r C o r p...

Page 89: ...rocedures must be performed to prevent excessive damage It is advisable to have your outboard motor ser viced by an authorized Yamaha dealer prior to storage However you the owner with a min imum of tools can perform the following pro cedures NOTICE ECM01360 To prevent problems which can be caused by oil entering the cylinder from the sump keep the outboard motor in the attitude shown when transpo...

Page 90: ...of the outboard motor with fresh water and dry off com pletely NOTICE Do not spray water into the air intake ECM01840 2 Spray the outboard motor exterior with Yamaha Silicone Protectant 3 Wax the cowling with a non abrasive wax such as Yamaha Silicone Wax EMU34741 Flushing power unit Perform this procedure right after operation for the most thorough flushing NOTICE ECM01530 Do not perform this pro...

Page 91: ...trical parts Turn off the engine and keep the key s and engine shut off cord lanyard with you when you perform maintenance un less otherwise specified The power trim and tilt switches operate even when the ignition key is off Keep people away from the switches whenev er working around the motor When the motor is tilted keep away from the area under it or between it and the clamp bracket Be sure no...

Page 92: ...nditions are dif ferent you should consider service more often than shown especially how often you change your engine and gear oil Examples might include extended wide open throttle use or long periods of trolling or idling carry ing heavy loads or frequent starting and stop ping or shifting More frequent maintenance will often pay off many times over in increased engine life and greater owner sat...

Page 93: ...eck ups which you may carry out yourself The symbol indicates work to be carried out by your Yamaha dealer Item Actions Initial Every 20 hours 3 months 100 hours 1 year 300 hours 3 years 500 hours 5 years Anode s external Inspection or replace ment as necessary Anode s cylinder head thermostat cov er Inspection or replace ment as necessary Anodes exhaust cover cooling water passage cover Rectifier...

Page 94: ...Propeller nut Cotter pin Inspection or replace ment as necessary PCV Pressure Con trol Valve Inspection or replace ment as necessary Spark plug s Inspection or replace ment as necessary Spark plug caps Inspection or replace ment as necessary Water from the cooling water pilot hole Inspection Thermostat Inspection or replace ment as necessary Timing belt Inspection or replace ment as necessary Valv...

Page 95: ... gauge Inspection Item Actions Every 1000 hours Guide exhaust ex haust manifold Inspection or replace ment as necessary Timing belt Replacement Item Actions Initial Every 20 hours 3 months 100 hours 1 year 300 hours 3 years 500 hours 5 years U6BR11E0 book Page 89 Friday June 13 2008 3 43 PM 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 96: ...intenance 90 EMU28932 Greasing Yamaha marine grease Water resistant grease F250B LF250B ZMU06248 U6BR11E0 book Page 90 Friday June 13 2008 3 43 PM 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 97: ...then remove the ignition coil Do not use any tools to remove or in stall the ignition coil otherwise the igni tion coil coupler may get damaged 3 Remove the spark plug If electrode ero sion becomes excessive or if carbon and other deposits are excessive you should replace the spark plug with another of the correct type WARNING When remov ing or installing a spark plug be care ful not to damage the...

Page 98: ...e engine and allow it to warm up fully in neutral until it is running smoothly 2 Verify whether the idle speed is set to specification For idle speed specifica tions see page 14 EMU37482 Changing engine oil NOTICE ECM01710 Change the engine oil after the first 20 hours of operation or 3 months and every 100 hours or at 1 year intervals thereafter Otherwise the engine will wear quickly The engine o...

Page 99: ... it again Be sure to completely insert the dipstick into the dipstick guide otherwise the oil level measurement will be incorrect 10 Recheck the oil level using the dipstick to be sure the level falls between the upper level mark and lower level mark Consult your Yamaha dealer if the oil lev el is out of specified level 1 Oil changer 1 Oil filler cap Recommended engine oil 4 stroke outboard motor ...

Page 100: ... wiring and connectors Check that each grounding wire is properly secured Check that each connector is engaged se curely EMU29173 Checking propeller WARNING EWM01880 You could be seriously injured if the en gine accidentally starts when you are near the propeller Before inspecting removing or install ing the propeller place the shift control in neutral turn the main switch to off and remove the ke...

Page 101: ...ller washer if equipped and thrust washer EMU30671 Installing propeller EMU29243 Spline models WARNING EWM00770 On counter rotation models be sure to use a propeller intended for counterclock wise rotation These propellers are identi fied with the letter L after the size indication on the propeller Otherwise the boat could move in the opposite direction from that expected NOTICE ECM00500 Be sure t...

Page 102: ...m or a stable stand You could be severely injured if the outboard motor falls on you Never get under the lower unit while it is tilted even when the tilt support lever or knob is locked Severe injury could oc cur if the outboard motor accidentally falls 1 Tilt the outboard motor so that the gear oil drain screw is at the lowest point possi ble 2 Place a suitable container under the gear case 3 Rem...

Page 103: ...f the oil level plug hole insert and tighten the oil level plug 8 Put a new gasket on the gear oil drain screw Insert and tighten the gear oil drain screw 9 Securely install the cooling water inlet covers on both sides of the gear case us ing the bolt and nut removed earlier 1 Oil level plug 2 Gasket 3 Cooling water inlet cover 4 Bolt 5 Gear oil drain screw 6 Nut 5 2 6 3 4 3 1 2 ZMU05487 Recommend...

Page 104: ...o the power unit EMU29322 Checking battery for electric start models WARNING EWM01900 Battery electrolytic fluid is poisonous and caustic and batteries generate explosive hydrogen gas When working near the bat tery Wear protective eye gear and rubber gloves Do not smoke or bring any other source of ignition near the battery Refer to page 16 for detailed safety infor mation about batteries The proc...

Page 105: ...ell ventilated vibration free location in the boat Install a fully charged battery in the holder NOTICE ECM01123 Reversal of the battery cables will damage the electrical parts 1 Make sure the main switch on applicable models is off before working on the battery 2 Connect the red battery cable to the POSITIVE terminal first Then con nect the black battery cable to the NEGA TIVE terminal 3 The elec...

Page 106: ... connecting cable 2 1 7 6 5 3 4 ZMU05939 1 Starboard side engine 2 Port side engine 3 Red cable 4 Black cable 5 Isolator leads with circuit protection 6 Fuse 7 Battery for starting 8 Battery for accessories 9 Negative connecting cable ZMU05941 1 3 9 3 4 6 4 2 5 7 8 7 U6BR11E0 book Page 100 Friday June 13 2008 3 43 PM 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 107: ...e to the electrical system ECM01940 3 Disconnect the positive cable s and re move the battery from the boat 4 Clean maintain and store the battery ac cording to the manufacturer s instruc tions 1 Starboard side engine 2 Center engine 3 Port side engine 4 Red cable 5 Black cable 6 Isolator leads with circuit protection 7 Fuse 8 Battery for starting 9 Battery for accessories 10 Negative connecting c...

Page 108: ...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 fresh fuel Q Is fuel filter clogged A Clean or replace filter Q Is starting procedure incorrect A See page 60 Q Has fuel pump malfunctioned A Have serviced by a Yamaha dealer Q Are spark plug s fouled or of incorrect type A Inspect spark pl...

Page 109: ... 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 carburetor clogged A Have serviced by a Yamaha dealer Q Is fuel joint connection incorrect A Connect correctly Q Is throttle valve adjustment incorrect A Have serviced by a Yamaha dealer Q Is battery cable disconnected A Connect securely Alert buzzer sounds...

Page 110: ...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 pinched or kinked fuel line or oth er obstructions in fuel system Q Is fuel filter clogged A Clean or replace filter Q Is fuel contaminated or stale A Fill tank with clean fresh fuel Q Is spark plug gap incorrect A Inspect and adjust as specified Q Is ignition ...

Page 111: ...rate If the outboard motor hits an object in the wa ter follow the procedure below 1 Stop the engine immediately 2 Inspect the control system and all compo nents for damage Also inspect the boat for damage 3 Whether damage is found or not return to the nearest harbor slowly and careful ly 4 Have a Yamaha dealer inspect the out board motor before operating it again EMU35790 Running in an emergency ...

Page 112: ... Consult your Yamaha dealer if the new fuse immediately blows again 1 Electrical cover 2 Fuse puller 3 Spare fuse 5 A 10 A 15 A 20 A 30 A 60 A 1 Electric throttle valve ECM Electronic con trol module fuse 10 A 2 Ignition coil Fuel injector Variable cam shaft timing ECM Electronic control mod ule fuse 30 A 3 Shift actuator fuse 15 A 4 Main switch PTT switch fuse 20 A 5 Starter relay fuse 30 A 6 Fue...

Page 113: ...g engine Allow the engine to cool There will be fuel in the fuel filter Keep away from sparks cigarettes flames or other sources of ignition This procedure will allow some fuel to spill Catch fuel in a rag Wipe up any spilled fuel immediately The fuel filter must be reassembled carefully with the O ring filter cup and hoses in place Improper assembly or replacement could result in a fuel leak whic...

Page 114: ...soaking it up with a rag 7 Firmly screw the filter cup onto the filter housing NOTICE Be careful not to twist the water detection switch lead when screwing the filter cup onto the filter housing ECM01970 8 Connect the water detection switch cou pler securely until a click is heard 9 Fasten the water detection switch lead with the holder 1 Holder 1 Water detection switch coupler ZMU06286 1 1 Filter...

Page 115: ...ning to port 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 immediate ly NOTICE Do not attempt to run the out board motor until it has been completely inspected ECM00401 1 Holder U6BR11E0 book Page 109 Friday June 13 2008 3 43 PM 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 116: ...Consumer information 110 EMU29811 Important warranty information for U S A and Canada U6BR11E0 book Page 110 Friday June 13 2008 3 43 PM 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 117: ...Consumer information 111 U6BR11E0 book Page 111 Friday June 13 2008 3 43 PM 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 118: ...rmation 112 EMU29830 YAMAHA MOTOR CORPORATION U S A FOUR STROKE OUTBOARD MOTOR THREE YEAR LIMITED WARRANTY U6BR11E0 book Page 112 Friday June 13 2008 3 43 PM 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 119: ...Consumer information 113 U6BR11E0 book Page 113 Friday June 13 2008 3 43 PM 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 120: ...nformation 114 EMU29841 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA U6BR11E0 book Page 114 Friday June 13 2008 3 43 PM 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 121: ...U6BR11E0 book Page 115 Friday June 13 2008 3 43 PM 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 122: ...DIC183 June 2008 4 6 1 CR Printed in Japan Printed on recycled paper YAMAHA MOTOR CORPORATION USA 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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Yamaha F250B, Owner'S Manual

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