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Yamaha 25D Owner's Manual

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25D
OWNER'S MANUAL
U.S.A.Edition
LIT-18626-05-83
6L2-28199-1L

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  • Page 1 OWNER’S MANUAL U.S.A.Edition LIT-18626-05-83 6L2-28199-1L...
  • Page 2 EMU25060 ZMU01690 Read this owner’s manual carefully before operating your outboard motor.

  • Page 3: Important Manual Information

    EMU25110 tain maximum enjoyment from your new Yamaha. If you have any question about the operation or maintenance of your outboard motor, please consult a Yamaha dealer. In this Owner’s Manual particularly important OWNER’S MANUAL...

  • Page 4: Table Of Contents

    Table of contents General information ......1 Operation ......... 17 Identification numbers record... 1 Installation........17 Outboard motor serial number ..1 Mounting the outboard motor ..17 Emission control information .... 1 Clamping the outboard motor..18 Breaking in engine ......19 North American models.....
  • Page 5 Table of contents Clamp screw mounting models ..34 IMPORTANT WARRANTY INFORMATION IF YOU USE Storing outboard motor ....34 YOUR YAMAHA OUTSIDE Procedure ........35 U.S.A. OR CANADA ....60 Lubrication (except oil injection models) ..36 Cleaning and anticorrosion measures ........

  • Page 6: General Information

    Record your outboard motor serial number in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in case your outboard motor is sto- len. ZMU04828 1.

  • Page 7: Safety Information

    General information Do not modify the outboard. Modifications could make the motor unfit or unsafe to 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.

  • Page 8: Important Labels

    General information a Float Plan with a responsible person. Be EMU25380 Important labels sure to cancel the Float Plan when you re- EMU25395 turn. Warning labels Use common sense and good judgment when boating. Know your abilities, and be sure you understand how your boat han- dles under the different boating conditions you may encounter.

  • Page 9: Basic Boating Rules (Rules Of The Road)

    General information control is in neutral position. Give-way vessel The vessel which does not have the right-of- EMU25500 way has the duty to take positive and timely Basic boating rules (Rules of action to stay out of the way of the Stand-On the road) vessel.

  • Page 10: Other Special Situations

    General information Way vessels). Both you and the meeting tion, provided the other vessel gives you the vessel must alter course to avoid each other. right-of-way as it should. Meeting Overtaking If you are meeting another power vessel If you are passing another vessel, you are head on, and are close enough to run the risk the “Give-Way”...
  • Page 11 General information Fishing vessel right-of-way state. The Uniform State Waterway Marking All vessels which are fishing with nets, lines System has been devised for these waters. or trawls are considered to be “fishing ves- This system uses buoys and signs with dis- sels”...

  • Page 12: Fueling Instructions

    General information ZMU01708 EMU25540 away from sparks, flames, or other Fueling instructions sources of ignition. EWM00010 Stop engine before refueling. WARNING Refuel in a well-ventilated area. Refuel GASOLINE AND ITS VAPORS ARE HIGH- portable fuel tanks off the boat. LY FLAMMABLE AND EXPLOSIVE! Take care not to spill gasoline.

  • Page 13: Gasoline

    Yamaha outboard motors are fitted with pro- EMU25570 pellers chosen to perform well over a range Gasoline of applications, but there may be uses where...

  • Page 14: Start-In-Gear Protection

    For instructions on propeller removal and in- stallation, see page 43. EMU25770 Start-in-gear protection Yamaha outboard motors or Yamaha-ap- proved remote control units are equipped with start-in-gear protection device(s). This feature permits the engine to be started only when it is in neutral. Always select neutral...

  • Page 15: Basic Components

    Basic components EMU25795 Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. ZMU04829 1. Top cowling lock lever 14. Clamp bracket 2. Choke knob 15. Rope attachment 3.

  • Page 16: Fuel Joint

    Basic components be used as a fuel storage container. Com- mercial users should conform to relevant licensing or approval authority regula- tions. ZMU02846 EMU25922 Gear shift lever Pulling the gear shift lever towards you puts the engine in forward gear so that the boat ZMU03157 moves ahead.

  • Page 17: Throttle Indicator

    Basic components there is too much resistance, it could be difficult to move throttle lever or grip, which could result in an accident. ZMU02848 EMU25961 Throttle indicator The fuel consumption curve on the throttle ZMU03688 indicator shows the relative amount of fuel When constant speed is desired, tighten the consumed for each throttle position.

  • Page 18: Engine Stop Button

    Basic components could cause people and objects in the boat to be thrown forward. NOTE: The engine cannot be started with the lock plate removed. ZMU04127 EMU26070 Manual starter handle To start the engine, first gently pull the han- dle out until resistance is felt. From that posi- tion, then pull the handle straight out quickly ZMU03689 to crank the engine.

  • Page 19: Trim Tab With Anode

    Basic components starboard side “B” in the figure. ECM00840 CAUTION: The trim tab also serves as an anode to protect the engine from electrochemical corrosion. Never paint the trim tab as it will become ineffective as an anode. ZMU02908 To increase resistance, turn the adjuster clockwise.

  • Page 20: Tilt Lock Mechanism

    CAUTION: in the tilted up position. Do not continue to operate the engine if a warning device has activated. Consult your Yamaha dealer if the problem can- not be located and corrected. EMU26813 Overheat warning This engine has an overheat warning device.
  • Page 21 Basic components If the engine temperature rises too high, the warning device will activate. Activation of warning device The engine speed will automatically de- crease to about 2000 r/min. The overheat warning indicator will light (if equipped on the bottom cowling or the ta- chometer).

  • Page 22: Operation

    Operation EMU26901 specific boat and motor combination. Installation EWM00830 ECM00110 WARNING CAUTION: Improper mounting of the outboard mo- Incorrect engine height or obstructions tor could result in hazardous conditions to smooth water flow (such as the design such as poor handling, loss of control, or or condition of the boat, or accessories fire hazards.

  • Page 23: Clamping The Outboard Motor

    Other- termine the optimum mounting height. wise the engine could be completely lost Consult your Yamaha dealer or boat man- if it accidentally falls off the transom. ufacturer for further information on deter- mining the proper mounting height.

  • Page 24: Breaking In Engine

    Operation board (if packed). For details, consult EMU27050 Gasoline and engine oil mixing chart your Yamaha dealer. (25:1) EWM00650 WARNING Avoid using bolts, nuts or washers other than those contained in the engine pack- aging. If used, they must be of at least the same quality of material and strength and must be tightened securely.

  • Page 25: Preoperation Checks

    Close the cap securely after refueling. line fumes. Wipe up any spilled fuel. Check fuel line connections to be sure they are tight (if equipped Yamaha fuel tank or Fuel tank capacity (if equipped Yamaha boat tank). fuel tank): Be sure the fuel tank is positioned on a se-...

  • Page 26: Ring Free Fuel Additive

    Yamaha recommends the use of Replace the fuel tank cap and close Ring Free Fuel Additive, available from tightly. your Yamaha dealer. Ring Free Fuel Addi- Shake the fuel tank to mix the fuel thor- tive has repeatedly proven its ability to clean oughly.

  • Page 27: Operating Engine

    Operation Replace the fuel can cap and close tight- are flammable and explosive. Refrain from smoking, and keep away from Shake the fuel can to mix the fuel thor- open flames and sparks while loosen- oughly. ing the air vent screw. Make sure that the oil and gasoline are This product emits exhaust gases mixed.

  • Page 28: Starting Engine

    Operation ZMU03714 ZMU02024 If a steering friction adjuster is provided NOTE: on your outboard motor, securely attach The start-in-gear protection device prevents the fuel line to the fuel line clamp. the engine from starting except when in neu- NOTE: tral. During engine operation place the tank hori- Attach the engine stop switch lanyard to zontally, otherwise fuel cannot be drawn...
  • Page 29 Operation the engine will run poorly or stall. Pull the manual starter handle slowly un- til you feel resistance. Then give a strong pull straight out to crank and start the engine. Repeat if necessary. ZMU03744 Place the throttle grip in the “ ”...

  • Page 30: Warming Up Engine

    Stop the engine and check whether the cooling water inlet on the lower case or the cooling water pilot hole is blocked. Consult your Yamaha dealer if the problem cannot be located and cor- rected. ZMU02030 Move the gear shift lever quickly and firmly from neutral to forward.

  • Page 31: Reverse (Manual Tilt And Hydro Tilt Models)

    Operation sition. ZMU03718 ZMU03719 Remote control models Pull up the neutral interlock trigger (if Move the gear shift lever quickly and equipped) and move the remote control firmly from neutral to reverse. lever quickly and firmly from neutral to forward. EMU27795 Reverse (manual tilt and hydro tilt models)

  • Page 32: Trimming Outboard Motor

    Operation ing the lock plate from the engine stop switch. EMU27861 Trimming outboard motor The trim angle of the outboard motor helps determine the position of the bow of the boat in the water. Correct trim angle will help im- prove performance and fuel economy while reducing strain on the engine.

  • Page 33: Adjusting Trim Angle For Manual Tilt Models

    Operation ZMU02909 1. Trim rod Reposition the rod in the desired hole. To raise the bow (“trim-out”), move the rod away from the transom. To lower the bow (“trim-in”), move the rod to- ward the transom. Make test runs with the trim set to different angles to find the position that works best for ZMU02858 your boat and operating conditions.

  • Page 34: Tilting Up And Down

    Operation the boat is up about 3 to 5 degrees. With the and making it hard to increase speed. Oper- bow up, the boat may have a greater tenden- ating with excessive trim-in at higher speeds cy to steer to one side or the other. Compen- also makes the boat unstable.

  • Page 35: Procedure For Tilting Up

    Operation the engine will be tilted for more than a few minutes. Otherwise fuel may leak. ECM00241 CAUTION: Before tilting the outboard motor, stop the engine by following the procedure on page 26. Never tilt the outboard mo- tor while the engine is running. Severe damage from overheating can result.

  • Page 36: Cruising In Shallow Water

    Operation port bar is automatically released. Slowly tilt the engine down. EMU28060 Cruising in shallow water The outboard motor can be tilted up partially to allow operation in shallow water. EMU28071 Cruising in shallow water (manual tilt models) ZMU02868 EWM00710 WARNING EMU28132 Place the gear shift in neutral before us-...

  • Page 37: Cruising In Other Conditions

    NOTE: For cooling system flushing instructions, see page 33. Cruising in turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit if you use the outboard motor in turbid (mud- dy) water conditions. ZMU03729...

  • Page 38: Maintenance

    Maintenance EMU28216 Choke valve Specifications Alternator output: Dimension: 80 W Overall length: Drive unit: 936 mm (36.9 in) Gear positions: Overall width: Forward-neutral-reverse 358 mm (14.1 in) Gear ratio: Overall height S: 2.08 (27/13) 1068 mm (42.0 in) Trim and tilt system: Transom height S: Manual tilt 419 mm (16.5 in)

  • Page 39: Clamp Screw Mounting Models

    When storing your Yamaha outboard motor sition using a motor support device such as for prolonged periods of time (2 months or a transom saver bar. Consult your Yamaha longer), several important procedures must dealer for further details. be performed to prevent excessive damage.

  • Page 40: Procedure

    12-00) to each gallon of fuel. Before starting the engine, be sure to NOTE: supply water to the cooling water passag- The use of “Yamaha Fuel Conditioner and Stabilizer” eliminates the need to drain the ECM00290 fuel system. Consult your Yamaha dealer or...

  • Page 41: Lubrication (Except Oil Injection Models)

    44. Inspect the oil for the pres- ZMU02871 ence of water that indicates a leaky seal. Seal replacement should be performed NOTE: by an authorized Yamaha dealer prior to For cooling system flushing instructions, see use. page 33. Grease all grease fittings. For further de- EMU28460 tails, see page 39.

  • Page 42: Periodic Maintenance

    If you or the owner is not famil- iar with machine servicing, this work should be done by your Yamaha dealer or other qualified mechanic. Maintenance, replacement, or repair of the emission control devices and sys- tems may be performed by any marine engine repair establishment or individual.

  • Page 43: Maintenance Chart

    Refer to the sections in this chapter for explanations of each owner-specific action. The “ ” symbol indicates the check-ups which you may carry out yourself. The “ ” symbol indicates work to be carried out by your Yamaha dealer. Initial Every 50 hours Item...

  • Page 44: Greasing

    Maintenance EMU28931 Greasing Yamaha marine grease (Water resistant grease) ZMU03734 EMU28951 sparks, which could lead to explosion or Cleaning and adjusting spark plug fire. EWM00560 The spark plug is an important engine com- WARNING ponent and is easy to inspect. The condition...

  • Page 45: Checking Fuel System

    Improper repairs can make the outboard unsafe to operate. Check the fuel lines for leaks, crack, or mal- function. If a problem is found, your Yamaha 1. Spark plug gap dealer or other qualified mechanic should re- 2. Spark plug I.D. mark (NGK) pair it immediately.

  • Page 46: Inspecting Fuel Filter

    If any water is found in the doing this procedure, consult your Yamaha dealer. fuel, the Yamaha portable fuel tank or other fuel tanks should be checked and Do not perform this procedure on a hot or running engine. Allow the engine to cleaned.

  • Page 47: Inspecting Idling Speed

    If you have difficulty ver- filter assembly. ifying the idle speed, or the idle speed re- Run the engine and check the filter and quires adjustment, consult a Yamaha dealer lines for leaks. or other qualified mechanic. EMU29040...

  • Page 48: Checking Propeller

    Maintenance EMU29171 Checking propeller EWM00321 WARNING 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, remove the spark plug caps from the spark plugs. Also, ZMU01897 place the shift control in neutral, turn Checkpoints...

  • Page 49: Removing The Propeller

    Apply Yamaha marine grease or a cor- Tilt the outboard motor so that the gear rosion resistant grease to the propeller oil drain screw is at the lowest point pos- shaft.

  • Page 50: Cleaning Fuel Tank

    If you have any question about properly NOTE: doing this procedure, consult your For disposal of used oil consult your Yamaha Yamaha dealer. dealer. Keep away from sparks, cigarettes, flames, or other sources of ignition With the outboard motor in a vertical po- when cleaning the fuel tank.

  • Page 51: Inspecting And Replacing Anode(S)

    Dispose of old gasoline according to lo- Inspect ground leads attached to external cal regulations. anodes on equipped models. Consult a Yamaha dealer for inspection and replace- Empty the fuel tank into an approved ment of internal anodes attached to the pow- container.
  • Page 52 Maintenance copper or graphite. These paints can cause more rapid engine corrosion. ZMU01943...

  • Page 53: Trouble Recovery

    Q. Has fuel pump malfunctioned? If your outboard motor requires repair, bring A. Have serviced by a Yamaha dealer. it to your Yamaha dealer. If the engine trouble warning indicator is Q. Are spark plug(s) fouled or of incorrect flashing, consult your Yamaha dealer.
  • Page 54 Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel. Q. Is carburetor clogged? A. Have serviced by a Yamaha dealer. Q. Is fuel filter clogged? A. Clean or replace filter. Q. Is fuel joint connection incorrect? A.
  • Page 55 Trouble Recovery A. Have serviced by a Yamaha dealer. Q. Are weeds or other foreign matter tangled on gear housing? Q. Is load on boat improperly distributed? A. Remove foreign matter and clean lower A. Distribute load to place boat on an even unit.

  • Page 56: Temporary Action In Emergency

    (the engine cannot be cranked with the start- er), the engine can be started with an emer- Q. Is steering pivot loose or damaged? gency starter rope. A. Tighten or have serviced by a Yamaha EWM01020 dealer. WARNING Use this procedure only in an emergen- EMU29431 cy and only to return to port for repairs.

  • Page 57: Emergency Starting Engine

    Trouble Recovery your arm or leg while operating. Do not attach the lanyard to clothing that could tear loose. Do not route the cord where it could become entangled, preventing it from functioning. Avoid accidentally pulling the lanyard during normal operation. Loss of en- gine power means the loss of most steering control.

  • Page 58: Treatment Of Submerged Motor

    After the engine If the outboard motor is submerged, immedi- starts, gradually return the choke knob ately take it to a Yamaha dealer. Otherwise to its home position as the engine warms some corrosion may begin almost immedi- ately.
  • Page 59 Feed fogging oil or engine oil through the carburetor(s) and spark plug holes while cranking with the manual starter or emergency starter rope. ZMU01911 Take the outboard motor to a Yamaha dealer as soon as possible. ECM00400 CAUTION: Do not attempt to run the outboard motor...

  • Page 60: Consumer Information

    Consumer information EMU29811 Important warranty information for U.S.A. and Canada...
  • Page 61 Consumer information...

  • Page 62: Yamaha Motor Corporation, U.s.a. Outboard Motor Two Year Limited Warranty

    Consumer information EMU29820 YAMAHA MOTOR CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY...
  • Page 63 Consumer information...
  • Page 64 Consumer information...
  • Page 65 Consumer information EMU29840 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE U.S.A. OR CANADA...
  • Page 66 Printed in Japan March 2004–0.2 × 1 ! Printed on recycled paper...
  • Page 67 (A l’usage du concessionnaire) MODÉLE ET NO. DE SÉRIE DU MOTEUR HORS-BORD (sur l’étiquette d’identification de la presse de fixation) YAMAHA DEALER NUMBER NO. DU CONCESSIONNAIRE YAMAHA DEALER NAME YAMAHA MOTOR CO., LTD. NOM DU MADE IN JAPAN CONCESSIONNAIRE PAYS D'ORIGINE JAPON USAGE...
  • Page 68 PLACE POSTAGE HERE ATTN: WARRANTY DEPARTMENT...

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