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Yamaha DX150A Owner's Manual

Manual is about: Outboard Motor DX150A

Summary of DX150A

  • Page 1

    Dx 150a lit-18626-04-60 dx150a owner’s manual u.S.A.Edition 67n-9-13hyoshi 01.4.19 6:33 pm y [ w 1 (2,1).

  • Page 2

    67n-9-13hyoshi 01.4.19 6:33 pm y [ w 2 (1,1).

  • Page 3: To The Owner

    E thank you for choosing a yamaha out- board motor. This owner’s manual con- tains information needed for proper oper- ation, maintenance and care. A thorough understanding of these simple instruc- tions will help you obtain maximum enjoyment from your new yamaha. If you have any question about the ...

  • Page 4

    67n-9-13-1 4/19/01 5:05 pm page 2.

  • Page 5: Contents

    E contents general information basic components operation maintenance trouble recovery index 1 2 3 4 5 6 read this owner’s manual carefully before operating your outboard motor. Emu00003 67n-9-13-1 4/19/01 5:05 pm page 3.

  • Page 6

    67n-9-13-1 4/19/01 5:05 pm page 4.

  • Page 7: Chapter 1

    E emu00004 chapter 1 general information identification numbers record ..1-1 outboard motor serial number...........1-1 key number...........................................1-1 emission control information...1-2 safety information..........................1-3 important labels ..........................

  • Page 8: Identification Numbers

    1-1 e emu00005 identification numbers record emu00007 outboard motor serial number the outboard motor serial number is stamped on the label attached to the port side of the clamp-bracket. Record your outboard motor serial num- ber in the spaces provided to assist you in ordering spare parts from you...

  • Page 9: Emission Control

    E 1-2 emu01385 emission control information emu01386 north american models this engine conforms to u.S. Environmental protection agency (epa) regulations for marine si engines. See the label affixed to your engine for details. Approval label of emission control certificate this label is attached to ...

  • Page 10: Safety

    E 1-3 emu00917 safety information 8 before mounting or operating the out- board motor, read this entire manual. Reading it should give you an under- standing of the motor and its operation. 8 before operating the boat, read any owner’s or operator’s manuals supplied with it and all labels. Be sure y...

  • Page 11

    E 1-4 8 when a swimmer is in the water near you shift into neutral and shut off the engine. 8 be informed about boating safety. Additional publications and information can be obtained from many organiza- tions, including the following: united states coast guard consumer affairs staff (g-bc) office o...

  • Page 12: Important Labels

    E 1-5 q w e e t 905011 r emu00014 important labels warning labels 2 3 warning 6k1-83623-41 yamaha use only a counterclockwise rotation propeller with this engine. Counterclockwise propellers are marked with a letter "l" after the size indication. The wrong type of propeller could cause the boat to g...

  • Page 13: Basic Boating Rules

    E 1-6 stand-on vessel the vessel with the right-of-way has the duty to continue its course and speed, except to avoid an immediate collision. When you maintain your direction and speed, the other vessel will be able to determine how best to avoid you. Give-way vessel the vessel which does not have t...

  • Page 14

    E 1-7 rules when encountering vessels there are three main situations which you may encounter with other vessels which could lead to a collision unless the steering rules are followed: meeting (you are approaching another vessel head-on) crossing (you are traveling across the other vessel’s path) ov...

  • Page 15

    E 1-8 the power-driven vessel, the power- driven vessel has the right-of-way. 2. Sailing vessels should keep clear of any fishing vessel. 3. In a narrow channel, a sailing vessel should not hamper the safe passage of a power-driven vessel which can navigate only in such a channel. Reading buoys and ...

  • Page 16

    E 1-9 1 1 1 a 1 1 1 proceeding toward head of navigation from seaward can buoy odd number. Leave to port. Or secondary channel buoys starts new numbering system old new c " 1" nun buoy even number. Leave to starboard n " 2" no change buoy color code black red green " a" " 2" " 1" " 3" " 4" " 5" " 7"...

  • Page 17: Fueling Instructions

    E 1-10 emu00017 fueling instructions w gasoline and its vapors are high- ly flammable and explosive! 8 do not smoke when refueling, and keep away from sparks, flames, or other sources of ignition. 8 stop engine before refueling. 8 refuel in a well-ventilated area. Refuel portable fuel tanks off the ...

  • Page 18

    E 1-11 emu00858 engine oil if the recommended engine oil is not available, another 2-stroke engine oil with a nmma-certified tc-w3 rating may be used. Emu00019 gasoline (petrol) if knocking or pinging occurs, use a differ- ent brand of gasoline or premium unlead- ed fuel. Emu00027 gasohol there are ...

  • Page 19: Propeller Selection

    E 1-12 emu01395* propeller selection the performance of your outboard motor will be critically affected by your choice of propeller, as an incorrect choice could adversely affect performance and could also seriously damage the motor. Engine speed depends on the propeller size and boat load. If engin...

  • Page 20

    E 1-13 25-mf q w 602023 yamaha outboard motors are fitted with propellers chosen to perform well over a range of applications, but there may be uses where a propeller with a different pitch would be more appropriate. For a greater operating load, a smaller-pitch propeller is more suitable as it enab...

  • Page 21: Start-In-Gear Protection

    E 1-14 emu01209 start-in-gear protection yamaha outboard motors or yamaha approved remote control units are equipped with start-in-gear protection device(s). This feature permits the engine to be started only when it is neutral. Always select neutral before starting the engine. 67n-9-13-1 4/19/01 5:...

  • Page 22: -Memo-

    E -memo- 67n-9-13-1 4/19/01 5:05 pm page 20

  • Page 23: Chapter 2

    E emu00037 chapter 2 basic components main components..............................2-1 operations of controls and other functions ................................2-2 remote control .....................................2-2 power trim/tilt switch ...........................2-6 digital tachometer.........

  • Page 24: Main Components

    E emu01206 main components 2-1 q w e r t y u i o !1 !0 101014* !2 101103 trip time batt km/h knot mph km mile speed yamaha set mode !4 !0 !5 !6 !3 !1 1 power trim and tilt switch 2 flushing device 3 tilt support lever 4 anti-cavitation plate 5 propeller 6 cooling water inlet 7 anode 8 clamp bracket ...

  • Page 25: Operations of Controls

    E emu00039 operations of controls and other functions emu00096 remote control both the shifter and the throttle are actu- ated by the remote control lever. In addi- tion, this control also has the electrical switches. 1 remote control lever 2 neutral interlock trigger 3 neutral throttle lever 4 main...

  • Page 26

    E 000323 up dn n 701033 w q 2-3 emu00099 neutral interlock trigger to shift out of neutral, the neutral inter- lock trigger of the remote control lever must first be pulled up. Emu00101 main switch the main switch controls the ignition sys- tem; its operation is described below. 8 off electrical cir...

  • Page 27

    E 2-4 emu00934 engine stop lanyard switch the lock-plate 1 must be attached to the engine stop lanyard switch for the engine to run. The lanyard 2 should be attached to a secure place on the operator’s cloth- ing, or arm or leg. Should the operator fall overboard or leave the helm, the lanyard will ...

  • Page 28

    E 701035 2-5 up dn 701034 up dn emu01331 power trim/tilt switch the power trim/tilt adjusts the motor angle in relation to the transom. The power trim/tilt switch is located on the remote control lever grip. Pushing the switch “up” trims the motor up, then tilts the motor up. Pressing the switch “dn...

  • Page 29

    E 2-6 302012 up down emu01125 power trim/tilt switch the power trim/tilt adjusts the motor angle in relation to the transom. The power trim/tilt switch is located on the side of the bottom engine cowling. Pushing the switch “up” trims the motor up, then tilts the motor up. Pressing the switch “dn” t...

  • Page 30

    E 2-7 001082 001049 emu01614 digital tachometer this gauge contains the tachometer, trim meter, hour meter, oil level indicator, and the overheat warning indicator. 1 tachometer 2 trim meter 3 hour meter 4 oil level indicator 5 overheat warning indicator 6 set button 7 mode button note: all segments...

  • Page 31

    E 2-8 emu00138 oil-level indicator this indicator shows the engine oil level. If the oil level falls below the lower limit, the warning indicator will start to blink. Refer to the sections “filling oil” and “oil level warning” for details. 1 oil-level indicator c c do not operate the engine without ...

  • Page 32

    E 2-9 802016* trip time batt km/h knot mph km mile speed yamaha set mode q w e r emu00140 digital speedometer this meter contains the speedometer, fuel meter with warning, trip meter, clock and voltmeter with warning. 1 speedometer 2 fuel meter 3 trip meter/clock/voltmeter 4 warning indicator note: ...

  • Page 33

    E 2-10 q w e 802023* emu00141 speedometer the meter will show the boat speed. Note: the speedometer displays km/h, mph, or knots, depending upon operator prefer- ence. Select the desired unit of measure- ment by setting the selector switch on the back of the meter. See the illustration for setting. ...

  • Page 34

    E 2-11 802025* trip time batt km/h knot mph km mile speed yamaha set mode emu00144 fuel meter the fuel level is displayed by eight seg- ments. When all segments are showing, the fuel is full. C c the yamaha fuel tank sensor is different from a conventional-type sensor. A wrong setting of the selecto...

  • Page 35: P S

    E 2-12 p s mpg km/l gph i/h econ sync ttl fuel management emu00145 warning indicator 8 fuel warning if the fuel level decreases to one segment the fuel level warning segment 1 begins blinking. 8 low battery voltage warning if battery voltage drops, the display 2 will be automatically turned on and i...

  • Page 36

    E 2-13 yamaha p s gph i/h econ sync ttl fuel management set mode 2 6 5 4 3 1 on (liter) l/h (gallon) gph q emu00147 fuel flow meter the meter displays fuel flow within one hour, at the rate of current engine opera- tion. If twin engines are installed on your boat, the meter will display total fuel f...

  • Page 37: P S

    E 2-14 emu01277 fuel economy this meter displays the distance per liter or gallon when cruising for reference use by the operator. Repeatedly push and release the “mode” button until the indicator on the face of the meter points to “econ.” note: if twin engines are installed on your boat, the meter ...

  • Page 38

    E 2-15 note: 8 fuel consumption varies greatly with boat design, weight, propeller used, engine trim angle, sea conditions (including wind), and throttle position. Fuel consumption also varies slightly with the type of water (salt, fresh, and contaminate levels), air temperature and humidity, cleanl...

  • Page 39: P S

    E 2-16 emu01278 twin engine speed synchronizer this meter displays the difference in engine speed (r/min) between the port and starboard engines for reference pur- poses when synchronizing the two engines’ speeds. Repeatedly push and release the “mode” button until the indicator on the face of the m...

  • Page 40

    E 2-17 emu00163 top cowling lock levers to remove the engine top cowling, pull up the front and rear lock levers. Then lift off the cowling. When replacing the cowl- ing, check to be sure it fits properly in the rubber seal. Then lock the cowling again by moving the levers downward. 301021 301022 em...

  • Page 41: Warning System

    E 2-18 701054 emu00169 warning system c c do not continue to operate the engine if the warning device has activated. Consult your yamaha dealer if the problem can- not be located and corrected. 605022 emu00170 overheat warning this engine has an overheat warning device. If the engine temperature ris...

  • Page 42

    E 2-19 701054 213022 q emu00172 oil level warning / oil filter clogging warning this engine has an oil level warning sys- tem. If oil level falls below lower limit, the warning device will activate. ( 1); included (—); n/a if the warning system has been activated, stop the engine and check for the c...

  • Page 43: Chapter 3

    E emu00174 chapter 3 operation installation ........................................3-1 mounting the outboard motor............3-2 filling fuel and engine oil ............3-4 filling fuel..............................................3-4 filling oil ................................................3-5...

  • Page 44: Installation

    E emu00175 installation c c incorrect engine height or obstructions to smooth water flow (such as the design or condition of the boat or accessories such as transom ladders/depth finder trans- ducers) can create airborne water spray while the boat is cruising. Severe engine damage may result if the ...

  • Page 45

    E emu00176 mounting the outboard motor w improper mounting of the outboard motor could result in hazardous condi- tions such as poor handling, loss of con- trol, or fire hazards. Observe the follow- ing: 8 the information presented in this sec- tion is intended as reference only. It is not possible ...

  • Page 46

    E w overpowering a boat may cause severe instability. Do not install an outboard motor with more horsepower than the maximum rating on the capacity plate of the boat. If the boat does not have a capacity plate, consult the boat manufac- turer. Emu01300* mounting height to run your boat at optimum ef...

  • Page 47: Filling Fuel

    E emu00186 filling fuel and engine oil emu01031 filling fuel 1) remove the fuel tank cap. 2) fill the fuel tank carefully. 3) close the cap securely after refueling. Wipe up any spilled fuel. Emu01019 ring free fuel additive gasoline is a precise blend of many differ- ent substances, each chosen to ...

  • Page 48

    E emu00190 filling oil (for precision blend system model) this engine uses the yamaha preci- sion blend system, which provides superior lubrication by ensuring the prop- er oil ratio for all operating conditions. No fuel premixing is needed (except during break-in/running-ins). Simply pour gaso- lin...

  • Page 49

    E c c when the engine is operated for the first time or stored for a period of time, a min- imum of 5 liters (5.3 us qt, 4.4 imp qt) of oil should be kept in the remote oil tank. Otherwise, the oil-feed pump chamber will not be filled with oil, and no oil will be supplied. 3-6 67n-9-13-3 4/19/01 5:0...

  • Page 50

    E 3-7 1,500 cm 3 (1.6 us qt, 1.31 imp qt) or less emu00200* oil level indicator the various oil level system functions are as follows: remarks oil level indi- cator (digital tachometer) oil level indi- cator (analog tachometer) engine oil tank remote oil tank green red green yellow red more than 300...

  • Page 51: Pre-Operation Checks

    E 3-8 emu00204 pre-operation checks w if any item in the pre-operation check is not working properly, have it inspected and repaired before operating the out- board motor. Otherwise, an accident could occur. C c do not start the engine out of water. Overheating and serious engine damage can occur. E...

  • Page 52

    E 3-9 emu00211 engine 8 check the engine and engine mounting. 8 look for loose or damaged fasteners. 8 check the propeller for damage. 8 check that the battery is in good condi- tion and battery connections are secure. Emu01174 operation after a long period of storage (for precision blend system mod...

  • Page 53: Breaking In (Running In)

    Eemu01175 breaking in (running in) engine your new engine requires a period of break-in (running-in) to allow mating sur- faces of moving parts to wear-in evenly. Correct break-in (running-in) will help ensure proper performance and longer engine life. C c 8 failure to follow the break-in (running- ...

  • Page 54

    E 3-11 emu00231 run the engine under load (in gear with a propeller installed) as follows. 1) first 10 minutes: run the engine at the lowest possi- ble-speed. A fast idle in neutral is best. 2) next 50 minutes: do not exceed half throttle (approxi- mately 3,000 r/min). Vary engine speed occasionally...

  • Page 55: Starting Engine

    E 3-12 902023* 902025 emu01197 starting engine w 8 before starting the engine, make sure that the boat is tightly moored and that you can steer clear of any obstructions. Be sure there are no swimmers in the water near you. 8 when the air vent screw is loosened, gasoline (petrol) vapor will be relea...

  • Page 56

    E 3-13 emu00248 procedure for remote control model 4) place the remote control lever in the neutral position. Note: the start-in-gear protection device per- mits the engine to be started only when it is in neutral. 000293 5) attach the engine stop switch lanyard to a secure place on your clothing, o...

  • Page 57

    On start off 701022 e 3-14 emu00949 electric start model 7) turn the main switch to “start”, and hold it for a maximum of 5 sec- onds. 8) immediately after the engine starts, release the main switch to return it to “on”. C c 8 do not turn the main switch to “start” when the engine is running. 8 do n...

  • Page 58: Warming Up Engine

    E 3-15 309013 emu01198 warming up engine 1) before beginning operation, allow the engine to warm up at idling speed for 3 minutes. (failure to do this will shorten engine life.) 2) check for a steady flow of water from the cooling-water pilot hole. C c a continuous flow of water from the pilot hole ...

  • Page 59: Shifting

    701043 n f n r 701044 e 3-16 emu00261 shifting w before shifting, make sure there are no swimmers or obstacles in the water near you. C c to change the shifting position from for- ward to reverse or vice-versa, close the throttle first so that the engine idles (or runs at low speeds). Emu00264 forwa...

  • Page 60: Stopping Engine

    E 3-17 on start off 701023 emu00273 stopping engine let it cool off for a few minutes at idle or low speed first. Stopping the engine immediately after operating at high speed is not recommended. Emu00276 1) turn the main switch to “off”. 2) if the fuel joints are provided, discon- nect the fuel lin...

  • Page 61: Trimming Outboard

    Q 000860 e 3-18 emu01412 trimming outboard motor the trim angle of the outboard motor helps determine the position of the bow of the boat in the water. The correct trim angle will help improve performance and fuel economy while reducing strain on the engine. The correct trim angle depends upon the c...

  • Page 62

    E 3-19 up dn 701034 up dn q adjusting trim angle emu01401 power trim/tilt model w 8 be sure all people are clear of the out- board motor when adjusting the trim/tilt angle, also be careful not to pinch any body parts between the drive unit and clamp bracket. 8 use caution when trying a trim position...

  • Page 63

    E 3-20 emu00282 bow up when the boat is on plane, a bow-up atti- tude result in less drag, greater stability and efficiency. This is generally when the keel line of the boat is up about 3 to 5 degrees. When trimmed out, the boat may have more tendency to steer to one side or the other. Compensate fo...

  • Page 64: Tilting Up/down

    E 000857 3-21 emu01200 tilting up/down if the engine will be stopped for some time, or if the boat is moored in shallows, the engine should be tilted up to protect the propeller and casing from damage by collision with obstructions, and also to reduce salt corrosion. C c before tilting the motor, fo...

  • Page 65

    E 3-22 up dn 701034* up dn 403033 302012 up down emu01201 procedure for tilting up power trim/tilt model 1) if there is a fuel joint or a fuel cock on the boat, disconnect the fuel line or close the fuel cock. 2) push the power trim/tilt switch “up” until the outboard has tilted up com- pletely. 3) ...

  • Page 66: Cruising In Other

    Emu00316 cruising in other conditions cruising in salt water after operating in salt water, wash out the cooling-water passages with fresh water to prevent them from becoming clogged- up with salt deposits. Note: refer to cooling system flushing instruc- tions in “transporting and storing outboard m...

  • Page 67: Chapter 4

    E emu00317 chapter 4 maintenance specification data.............................4-1 transporting and storing outboard motor ...............................4-2 trailering outboard motor...................4-2 storing outboard motor ......................4-3 periodic maintenance......................4-...

  • Page 68: Specification Data

    Recommended fuel p.O.N. Fuel tank capacity l (us gal, imp gal) recommended engine oil fuel/oil premix ratio fuel : oil engine oil capacity (engine oil tank) l (us qt, imp qt) (remote oil tank) l (us qt, imp qt) recommended gear oil gear oil capacity cm 3 (us oz, imp oz) spark plug n•m (kgf•m, lb•ft)...

  • Page 69: Transporting and

    E 4-2 emu01369 transporting and storing outboard motor w leaking fuel is a fire hazard. When trans- porting and storing the outboard motor, close the air vent screw and fuel cock to prevent fuel from leaking. 000858 emu00326 trailering outboard motor the motor should be trailered and stored in the n...

  • Page 70

    E 4-3 emu00332 storing outboard motor when storing your yamaha outboard for prolonged periods of time, (2 months or longer), several important procedures must be performed to prevent expensive damage. This is especially important for your precision blend equipped outboard due to the lean oil ratios ...

  • Page 71

    E 4-4 emu00338* flushing cooling system and fogging engine cooling system flushing is essential to prevent the cooling system from clogging up with salt, sand, or dirt. In addition, fog- ging of the engine is mandatory to pre- vent expensive engine damage due to rust. Perform the flushing and foggin...

  • Page 72

    E 4-5 6) just prior to turning off the engine, quickly spray “yamaha stor-rite engine fogging oil” (part no. Lub- strrt-12-00) alternately into each carburetor. When properly done, the engine will smoke excessively and almost stall. 7) after stopping the engine, turn off the water and disconnect the...

  • Page 73

    E 4-6 emu00350* lubrication 1) remove the spark plug(s). Spray a “yamaha stor-rite engine fogging oil” into each cylinder for 5 seconds. Grease the spark plug threads and reinstall the spark plug(s) and torque to proper specification. (refer to “cleaning and adjusting spark plug”.) 2) turn the engin...

  • Page 74

    E 901015 upp er lev el low er le vel 4-7 emu00353 battery care w battery electrolyte is poisonous and dan- gerous, causing severe burns, etc. It con- tains sulfuric acid. Avoid contact with skin, eyes, or clothing. Antidote: external; flush with water. Internal; drink large quantities of water or mi...

  • Page 75: Periodic Maintenance

    E 4-8 emk32110 periodic maintenance w be sure to turn off the engine when you perform maintenance unless otherwise specified. If the owner is not familiar with machine servicing, this work should be done by a yamaha dealer or other quali- fied mechanic. A service manual is available for purchase thr...

  • Page 76

    E 4-9 emu00362 maintenance chart frequency of maintenance operations may be adjusted according to the operating con- ditions, but the following table gives general guidelines. The mark ( 6) indicates the check-ups which you may carry out yourself. The mark ( 1) indicates work to be carried out by yo...

  • Page 77

    E 4-10 emu00366 greasing yamaha marine grease (water resistant grease) 103171 67n-9-13-4 4/19/01 5:11 pm page 11.

  • Page 78

    Emu01202 cleaning and adjusting spark plug w when removing or installing a spark plug, be careful not to damage the insulator. A damaged insulator could allow external sparks, which could lead to explosion or fire. The spark plug is an important engine component and is easy to inspect. The condition...

  • Page 79

    E 4-12 when fitting the plug, always clean the gasket surface and use a new gasket. Wipe off any dirt from the threads and screw in the spark plug to the correct torque. Note: if a torque-wrench is not available when you are fitting a spark plug, a good esti- mate of the correct torque is 1/4 to 1/2...

  • Page 80

    E 4-13 emu00369 checking fuel system w gasoline (petrol) and its vapors are highly flammable and explosive. Keep away from sparks, cigarettes, flames or other sources of ignition. Check the fuel line for leaks, cracks, or malfunctions. If any problem is found, it should be repaired immediately by ya...

  • Page 81

    E 4-14 207052* r t e w y emu00370 inspecting fuel filter w gasoline (petrol) is highly flammable, and its vapors are flammable and explosive. 8 if you have any question about properly doing this procedure, consult your yamaha dealer. 8 do not perform this procedure on a hot or running engine. Allow ...

  • Page 82

    E 4-15 5) tighten the ring nut approximately an additional 1/4 turn until ring nut is tight. Align one of the four larger ring nut tabs into the slot of the locking tab. Install the locking tab bolt and tighten. 6) run the engine and check the filter and lines for leaks. Note: if any water is in the...

  • Page 83

    E 4-16 a diagnostic tachometer should be used for this procedure. 1) start the engine and allow it to warm up fully in neutral until it is running smoothly. If the outboard is mounted on a boat, be sure the boat is tightly moored. 2) adjust the throttle stop-screw 1 to set the idling speed to specif...

  • Page 84

    E 4-17 w 000855 r e t q emu01330 replacing fuse if a fuse has blown, remove the electrical cover, open the fuse holder and remove the fuse with a fuse puller. Replace it with a spare one of proper amperage. W be sure to use the specified fuse. An incorrect fuse or a piece of wire may allow excessive...

  • Page 85

    E 4-18 q w emu00993 checking power trim and tilt system w 8 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 accidentally falls. 8 make sure no one is under the out- board before performing this test. 1) check th...

  • Page 86

    E 4-19 210012 602026 602035 602034 emu00388 checking propeller w you could be seriously injured if the engine accidentally starts while you are near the propeller. 8 before inspecting, removing or installing the propeller, remove the spark plug caps from the spark plugs. Also, put the shift control ...

  • Page 87

    E 4-20 602034 1 front thrust washer 2 front propeller 3 lock washer 4 front propeller nut 5 rear thrust washer 6 rear propeller 7 spacer 8 washer 9 rear propeller nut 0 cotter pin q w e r t y u i o !0 602064 q w 602071* emu00399 installing the propeller c c 8 the combination of front and rear pro- p...

  • Page 88

    E 4-21 5) bend the lock washer tab into the pro- peller nut groove. 6) shift into forward again and reset the front propeller with the trailing edge of the blade pointing up with the cen- ter line of the lower case. 7) turn the rear propeller shaft counter- clockwise until free play is removed. 8) i...

  • Page 89

    E 4-22 q w 601023* emu00905 changing gear oil w 8 be sure the outboard is securely fas- tened to the transom or a stable stand. You could be severely injured if the out- board falls on you. 8 never get under the lower unit while it is tilted, even when the tilt-support lever is locked. Severe injury...

  • Page 90

    E 4-23 5) with the outboard motor in an verti- cal position, using a flexible or pres- surized filling device, inject the gear oil into the oil drain plug hole. 6) when the oil begins to flow out of the oil level plug hole, insert and tighten the oil level plug. 7) insert and tighten the oil drain p...

  • Page 91

    E 4-24 emu00404 checking battery (for electric start model) w battery electrolytic fluid is dangerous; it contains sulfuric acid and therefore is poi- sonous and highly caustic. Always follow these preventive mea- sures: 8 avoid bodily contact with electrolytic fluid as it can cause severe burns or ...

  • Page 92

    E 4-25 c c 8 a poorly maintained battery will quick- ly deteriorate. 8 ordinary tap-water contains minerals harmful to a battery, and should not be used for topping-up. 1) check the electrolyte level at least once a month. Fill to the manufactur- er’s recommended level when neces- sary. Top up only ...

  • Page 93

    E 4-26 c c 8 make sure the main switch (on applica- ble models) is “off” before working on the battery. 8 reversal of the battery leads will dam- age the rectifier. 8 connect the red lead first when installing the battery and disconnect the red lead last when removing it. Otherwise, the electrical s...

  • Page 94

    E 4-27 emu01280 disconnecting the battery disconnect the black lead from the neg- ative (-) terminal first. Then disconnect the red lead from the positive (+) termi- nal. Emu00408 checking bolts and nuts 1) check that bolts securing the cylinder head and engine and the nut securing the flywheel are ...

  • Page 95

    E 4-28 q w e 000843 emu01172 cleaning cooling-water passages flushing device equipped model perform this procedure right after opera- tion for the most thorough flushing. 1) after shutting off the engine, unscrew the garden-hose connector 2 from the fitting 1 on the bottom cowling. 2) screw the gard...

  • Page 96

    E 4-29 emu00412 checking painted surface of motor check the motor for scratches, nicks, or flaking paint. Areas with damaged paint are more likely to corrode. If necessary, clean and paint the areas. A touch-up paint is available from a yamaha dealer. 102055 emu00413 coating the boat bottom a clean ...

  • Page 97: Chapter 5

    E emu00414 chapter 5 trouble recovery troubleshooting ..............................5-1 temporary action in emergency ............................................5-5 impact damage.....................................5-5 power trim/tilt will not operate ...........5-5 starter will not operate ..........

  • Page 98: Troubleshooting

    E 5-1 emu01204¯ troubleshooting a problem in the fuel, compression, or ignition systems can cause poor starting, loss of power, or other problems. The troubleshooting chart describes basic checks and possi- ble remedies. (this chart covers all yamaha outboard motors. Therefore, some items may not ap...

  • Page 99

    E 5-2 c. Engine idles irregularly or stalls. Trouble possible cause remedy 1. Spark plug(s) fouled or incorrect type. 2. Fuel system obstructed. 3. Fuel contaminated or stale. 4. Fuel filter clogged. 5. Failed ignition parts. 6. Warning system activated. 7. Spark plug gap incorrect. 8. Poor connecti...

  • Page 100

    E 5-3 d. Warning buzzer sounds or indicator lamp lights. Trouble possible cause remedy 1. Cooling system clogged. 2. Engine oil level low. 3. Heat range of spark plug incorrect. 4. Specified engine oil not used. 5. Engine oil contaminated or deteriorated. 6. Oil filter clogged. 7. Oil feed/injection...

  • Page 101

    E 5-4 trouble possible cause remedy 15. Specified engine oil not used. 16. Thermostat faulty or clogged. 17. Air vent screw closed. 18. Fuel pump damaged. 19. Fuel joint connection incorrect. 20. Heat range of spark plug incorrect. 21. Engine not responding properly to shift lever position. 15. Chec...

  • Page 102: Temporary Action In

    E emu00416 temporary action in emergency emu00417 impact damage w 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 the outboard motor hits any object in the water, follow the procedure below. 1) sto...

  • Page 103

    E 5-6 emu00424 starter will not operate if the starter mechanism does not operate (engine cannot be cranked with the starter), the engine can be manually start- ed with an emergency starter rope. However, the engine can not be manually started if the battery has low voltage. If the battery is discha...

  • Page 104

    On start off 701026 e 301021 208036 5-7 emu00430 emergency starting engine 1) remove the top cowling. 301022 2) remove the flywheel cover. 3) prepare the engine for starting. See “starting engine” for procedures. Be sure the engine is in neutral and that the lanyard is attached to the engine stop sw...

  • Page 105

    E 5-8 emu00438 engine fails to operate if the engine speed becomes erratic or the engine stops unexpectedly, or if the engine does not start, the following emer- gency circuit procedure may allow you to return to port for repairs. Before using this procedure, be sure to check the “troubleshooting” s...

  • Page 106

    701063 n e w q on start off 701022 5-9 000858 if an engine fails to start, use the follow- ing procedure. 1) adjust the trim angle so that the engine is vertical or trimmed in. 2) disconnect the yellow/white emer- gency connector. The ignition timing advance circuit of the microcomputer is bypassed....

  • Page 107

    E 5-10 emu01191 low oil level warning activates if the oil level is allowed to drop too low, the red segment will appear on the oil level indicator, the buzzer will sound, and engine speed will be limited to about 2,000 r/min. If this happens, a reserve amount of oil can be pumped from the remote oi...

  • Page 108

    E 5-11 note: 8 reserve oil capacity is maximum 1,500 cm 3 (1.6 us qt, 1.31 imp qt). 8 the oil feed pump will not operate if the engine is tilted more than 35°. Put the engine in the down position before operating the emergency switch. 67n-9-13-5 4/19/01 5:13 pm page 12.

  • Page 109

    E 5-12 emu00446 treatment of submerged motor if the outboard motor is submerged, immediately take it a yamaha dealer. Otherwise, some corrosion may begin almost immediately. If you cannot immediately take the out- board motor to a yamaha dealer, follow the procedure bellow for taking care to minimiz...

  • Page 110: -Memo-

    E -memo- 67n-9-13-5 4/19/01 5:13 pm page 14.

  • Page 111: Chapter 6

    E emu00450 chapter 6 index index........................................................6-1 1 2 3 4 5 6 67n-9-13-6 4/19/01 5:15 pm page 1.

  • Page 112: Index

    E emu00451 index a adjusting idling speed ..........................4-15 adjusting trim angle..............................3-19 b basic boating rules ..................................1-6 battery care...............................................4-7 battery requirement ................................

  • Page 113

    E 6-2 mounting height ......................................3-3 mounting the outboard motor ...............3-2 n neutral interlock trigger ..........................2-3 neutral throttle lever ...............................2-3 o oil level indicator..............................2-9, 3-7 oil level war...

  • Page 114: Canada

    Emu01599 important warranty information for u.S.A. And canada welcome to the yamaha family! Congratulations on the purchase of your new yamaha marine power. Yamaha is commit- ted to exceptional customer satisfaction, and we want your ownership experience to be a satisfying one. Please read the follo...

  • Page 115

    5. Your warranty applies specifically to repairs made in the country of purchase. If your u.S.-purchased yamaha needs warranty service while in canada, or your canadian pur- chased yamaha needs service while in the united states, yamaha will assist the local dealer whenever possible. However, some p...

  • Page 116

    Emu00912* yamaha motor corporation, u.S.A. Outboard motor two year limited warranty yamaha motor corporation, u.S.A. Is proud of its heritage and reputation for producing products with high standards of quality and workmanship. Product excellence provides the cornerstone for our commitment to custom...

  • Page 117

    Specific parts excluded from warranty. Parts replaced due to normal wear or routine maintenance such as oil, spark plugs, shear pins, propellers, hubs, fuel and oil filters, brushes for the starter motor and power tilt motor, water pump impellers, and anodes are not covered by warranty. Charges for ...

  • Page 118

    Customer service if your machine requires warranty service, you must take it to any authorized yamaha outboard dealer within the continental united states. Be sure to bring your warranty registration identification or other valid proof of the original date of purchase. If a question or problem arise...

  • Page 119

    Emu01178 important warranty information if you use your yamaha outside u.S.A. Or canada welcome to the yamaha family! Congratulations on the purchase of your new yamaha marine power. Yamaha is com- mitted to exceptional customer satisfaction, and we want your ownership experience to be a satisfying ...

  • Page 120

    67n-9-13-6 4/19/01 5:15 pm page 10

  • Page 121

    67n-9-13hyoshi 01.4.19 6:33 pm y [ w 2 (2,1).

  • Page 122: Own

    Dx1 50a printed in japan april 2001—0.5 × 1 ! 67n-28199-13 (d150neto) (e) printed on recycled paper own 67n-9-13hyoshi 01.4.19 6:33 pm y [ w 1 (1,1).

  • Page 123: Lit-18626-04-60

    Dx 150a lit-18626-04-60 dx150a owner’s manual u.S.A.Edition 67n-9-13hyoshi 01.4.19 6:33 pm y [ w 1 (2,1).