Yamaha 115 C Service Manual

							5-10
E
301026*
e
q
w
NOTE:
8Reserve oil capacity is maximum 1,500
cm
3(1.6 US qt, 1.31 Imp qt).
8Put the engine in the down position
before operating the emergency switch.
EMD64111*
TOP COWLING DOES NOT UNLOCK
If the top cowling stays locked when the
release lever is operated, the cable may
be damaged or misadjusted.
1) Pull the cowling release lever 1to
unlock the front lock.
2) Pull the emergency cowling release
wire 2coming out of the hole on the
side of the pilot hole in the bottom
cowling to release the port side rear
lock.
3) Lift the port side of the top cowling to
pull out the emergency cowling
release wire 3from the port side of
the bottom cowling.
4) Pull the emergency cowling release
wire 3to release the starboard side
rear lock.
cC
Be sure the problem with the cowling
lock is repaired before reinstalling the
cowling.
 64C-9-18-5  3/13/03 10:21 AM  Page 11 
						

							5-11
EMN50011
TREATMENT OF SUBMERGED
MOTOR
If the outboard motor is submerged, imme-
diately take it a Yamaha dealer. Otherwise,
some corrosion may begin almost immedi-
ately. If you cannot immediately take the
outboard motor to a Yamaha dealer, follow
the procedure below for taking care to mini-
mize engine damage.
1) Thoroughly wash away mud, salt, sea-
weed, etc. with fresh water.
2) Remove the spark plugs, and face the
spark plug holes downward to allow any
water, mud or contaminants to drain.
3) Drain the fuel from the carburetor.
4) Feed fogging oil or engine oil through
the carburetors and spark plug holes
while cranking with the manual starter or
emergency starter rope.
5) Take the outboard motor to a Yamaha
dealer as soon as possible.
cC
Do not attempt to run the motor until it
has been completely inspected.
E
107012
107013
107014
 64C-9-18-5  3/13/03 10:21 AM  Page 12 
						

							EMP00010
Chapter 6
INDEX
INDEX........................................................6-1
E
1
2
3
4
5
6
 64C-9-18-6  2/19/03 9:13 AM  Page 1 
						

							6-1
E
EMR80000
INDEX
A
Adjusting trim angle ..............................3-21
B
Basic boating rules ..................................1-6
Battery care...............................................4-8
Battery requirement ..............................1-12
Breaking in engine .................................3-11
C
Changing gear oil...................................4-22
Checking battery ....................................4-24
Checking bolts and nuts ........................4-28
Checking fuel system ............................4-12
Checking painted surface of motor......4-29
Checking power trim and tilt system ...4-19
Checking propeller .................................4-20
Checking top cowling ............................4-11
Checking water trap under engine oil 
tank ..........................................................4-15
Checking wiring and connectors ..........4-16
Choke knob ...............................................2-8
Choke switch ............................................2-5
Cleaning and adjusting spark plug ......4-10
Cleaning and anti-corrosion 
measure ....................................................4-6
Cleaning cooling-water passages ........4-28
Cleaning fuel filter..................................4-13
Cleaning the outboard motor ...............4-28
Clock ........................................................2-14
Coating the boat bottom .......................4-29
Connecting the battery ..........................4-26
Cruising in other conditions .................3-25
Cruising in salt water .............................3-25
Cruising in turbid water ........................3-25
D
Digital speedometer ..............................2-13
Digital tachometer .................................2-10
Disconnecting the battery .....................4-27
E
Emission control information .................1-2Engine fails to operate.............................5-8
Engine oil ................................................1-11
Engine stop lanyard switch.....................2-6
Exhaust leakage .....................................4-16
F
Filling fuel .................................................3-4
Filling fuel and engine oil ........................3-4
Filling fuel tank .........................................4-4
Filling oil....................................................3-5
Flushing cooling system and fogging 
engine........................................................4-5
Flushing device ......................................2-21
Forward ...................................................3-18
Free accelerator ........................................2-8
Fuel consumption meter .......................2-17
Fuel economy .........................................2-17
Fuel flow meter ......................................2-16
Fuel management meter .......................2-16
Fuel meter ...............................................2-15
Fueling instructions ...............................1-10
G
Gasohol ...................................................1-11
Gasoline ..................................................1-11
Greasing..................................................4-17
H
Hour meter..............................................2-11
I
Identification numbers record ................1-1
Impact damage ........................................5-5
Important labels .......................................1-5
Inspecting and replacing anode ...........4-23
Inspecting idling speed .........................4-14
Installation ................................................3-1
K
Key number ..............................................1-1
L
Low oil lever warning activates..............5-9
Lubrication ................................................4-6
M
Main components ....................................2-1
Main switch ..............................................2-5
 64C-9-18-6  2/19/03 9:13 AM  Page 2 
						

							6-2
E
Maintenance chart .................................4-10
Motor exterior ........................................4-28
Mounting height ......................................3-3
Mounting the outboard motor ...............3-2
N
Neutral interlock trigger ..........................2-4
Neutral throttle lever ...............................2-4
O
Oil level indicator .............................2-12,3-8
Oil level warning/oil filter clogging
warning ...................................................2-23
Operation after a long period of 
storage ....................................................3-10
Operations of controls and other
functions ...................................................2-3
Outboard motor serial number ..............1-1
Overheat warning ..................................2-22
Overheat warning indicator ..................2-12
P
Periodic maintenance ..............................4-8
Power trim / tilt will not operate .............5-5
Power trim/tilt switch...............................2-9
Power trim / tilt switches .........................2-7
Pre-operation check .................................3-9
Propeller selection .................................1-12
R
Remote control.........................................2-3
Remote control lever ...............................2-4
Replacement parts ...................................4-8
Replacing fuse ........................................4-16
Reverse ...................................................3-18
S
Safety information ...................................1-3
Shifting....................................................3-18
Specifications ...........................................4-1
Speedometer ..........................................2-13
Start-in-gear protection .........................1-14
Starter will not operate............................5-6
Starting engine ......................................3-13
Stopping engine.....................................3-19
Storing outboard motor ..........................4-4T
Tachometer.............................................2-10
Temporary action in emergency ............5-5
Throttle friction adjusting screw ............2-7
Tilt support lever ....................................2-20
Tilting up/down ......................................3-23
Top cowling does not unlock ...............5-10
Top cowling lock levers.........................2-20
Top cowling release lever .....................2-20
Trailering outboard motor ......................4-3
Transporting and storing outboard 
motor .........................................................4-3
Treatment of submerged motor ..........5-11
Trim angle settings and boat 
handling ..................................................3-22
Trim meter ..............................................2-11
Trim tab .....................................................2-8
Trimming outboard motor....................3-20
Trip meter ...............................................2-14
Troubleshooting.......................................5-1
Twin engine speed synchronizer .........2-19
W
Warming up engine ...............................3-17
Warning indicator ..................................2-15
Warning system .....................................2-22
Warranty information .................Next page
Water leakage.........................................4-16
Water separator warning indicator ......2-19
 64C-9-18-6  2/19/03 9:13 AM  Page 3 
						

							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
committed to exceptional customer satisfaction, and we want your ownership
experience to be a satisfying one. Please read the following warranty information to help
ensure satisfaction with your Yamaha.
Yamaha is ready to stand behind your purchase with strong warranty coverage. To be sure
you receive all the benefits of warranty, please take the following steps:
1. Be sure your new Yamaha is registered for warranty. Your boat dealer should do this at
the time of sale. Make sure your dealer gives you a copy of the completed Yamaha
registration card for your records. If you are unsure whether or not your Yamaha is
registered, complete the Warranty Registration card found inside the cover of the
Owners Manual. Mail it to the distributor for the country in which you live (see step 6 for
the correct address). If your Yamaha is not properly registered, a warranty repair could
be unnecessarily delayed while registration records are checked.
2. Read the Limited Warranty statement which follows these instructions. This warranty
applies to Yamaha outboard motors sold in the United States, whether purchased
separately or when supplied as original equipment by a boat builder. The terms also
apply to original equipment packages sold in Canada, with coverage provided by
Yamaha Motor Canada (see ``Warranty Guide for Canadian models). This warranty
explains the conditions of the warranty, including the obligations that your dealer and
you as the owner have under the warranty. For example, your Yamaha outboard must
receive a proper pre-delivery inspection (PDI) by the selling dealer. Failure to take this
important step could jeopardize warranty coverage!
3. If you need warranty repairs, you must take your Yamaha outboard to an authorized
Yamaha outboard dealer. Be aware that not all selling boat dealers are authorized
Yamaha dealers. Only authorized dealers have the factory training, special tools, and
Yamaha support needed to perform warranty repairs.
4. If you are away from home, or your selling dealer is not an authorized Yamaha dealer,
use the following toll-free numbers to find the nearest Yamaha dealer.
United States Dealer Locations: 1-800-692-6242
Canada Dealer Locations: 1-800-267-8577
 64C-9-18-6  2/19/03 9:13 AM  Page 4 
						

							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
purchased Yamaha needs service while in the United States, Yamaha will assist the local
dealer whenever possible. However, some products available in one country may not be
sold or serviced in the other.
6. If you need any additional information about your Yamaha or warranty coverage which
your dealer cannot provide, please contact us directly.
Yamaha Motor Corporation, U.S.A.
P.O. Box 6555
Cypress, CA 90630
Attention: Customer Relations Department
Telephone No. (714) 761-7439
Fax No. (714) 761-7559
Yamaha Motor Canada Ltd.
480 Gordon Baker Road
Toronto, Ontario
M2H 3B4
Attention: Customer Relations Department
Telephone No. (416) 498-1911
Fax No. (416) 491-3122
 64C-9-18-6  2/19/03 9:13 AM  Page 5 
						

							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 customer satisfaction. The Yamaha Outboard
Limited Warranty is your assurance of  this commitment.
This warranty provides you with protection against the expense of repairs for your outboard motor that are required as a result of
defects in materials or workmanship. When maintained and utilized in the prescribed manner, you can count on your Yamaha outboard
to provide reliable service.
This warranty provides you with specific coverage and notes your responsibilities in maintaining and operating your outboard. Please
take the time to read and become familiar with this warranty.
PERIOD OF WARRANTY.Any new Yamaha outboard motor purchased and registered with Yamaha Motor Corporation, U.S.A. for
pleasure use in the United States, will be warranted against defects in material or workmanship for a period of two (2) years from date of
purchase, subject to exclusions noted herein. Any Yamaha outboard motor purchased and utilized for commercial applications will be
warranted for a period of one (1) year from the date of purchase, subject to exclusions noted herein. Yamaha peripheral equipment
included with the motor, such as gauges, fuel tanks and hoses, remote control boxes, propellers, and wiring external from the motor
unit, will be warranted for one (1) year from the date of purchase for either pleasure or commercial use. Replacement parts used in
warranty repairs will be warranted for the balance of the applicable warranty period.
The second year of warranty (if applicable) shall be limited to covering the cost of parts and labor for major components only. The major
components covered are:
Power Unit Section
8Power Head
8Intake Manifold and Reed Valve Assembly
8Carburetor Assembly and its Related Components
8Fuel and Oil Pump Assemblies
8Ignition System (Standard and Microcomputer)
8Precision Blend ® System
Bracket Section
8Bracket System
8Power Trim and Tilt Assembly
Lower Unit Section
8Exhaust System
8Upper Casing
8Lower Unit Assembly
The warranty described here applies to outboard motor purchased and registered for use in the United States only excluding its
territories. For warranty provisions outside the United States, contact the particular country’s local Yamaha distributor.
WARRANTY REGISTRATION.To be eligible for warranty coverage, the outboard motor must first be registered with Yamaha Motor
Corporation, U.S.A. A warranty registration form is provided in the Owner`s Manual with each outboard. This form must be completed
and mailed to Yamaha by either the selling dealer or the purchaser. Warranty registration can also be accomplished by any authorized
Yamaha outboard dealer. Upon receipt of the registration, an Owner`s Warranty Card will be sent by Yamaha to the registered
purchaser.
OBTAINING REPAIRS UNDER WARRANTY.To receive repairs under this warranty, a valid Owner`s Warranty Card must be presented to
an authorized Yamaha outboard dealer.
During the period of warranty, any authorized Yamaha outboard dealer will, free of charge, repair or replace, at Yamaha`s option, any
parts adjudged defective by Yamaha due to faulty workmanship or material from the factory. All replaced parts will become the property
of Yamaha Motor Corporation, U.S.A.
CUSTOMER`S RESPONSIBILITY.Under the terms of this warranty, the customer will be responsible for ensuring that the outboard
motor is properly operated, maintained and stored as specified in the applicable Owner’s Manual.
The owner of the outboard motor shall give notice to an authorized Yamaha marine dealer of any and all apparent defects within ten
(10) days of discovery and make the motor available at that time for inspection and repairs at the dealer’s place of business.
GENERAL EXCLUSIONS FROM WARRANTY.This warranty will not cover the repair of damage if the damage is a result of abuse or
neglect of the product. Examples of abuse and neglect include, but are not limited to:
1. Racing or competition use, modification of original parts, abnormal strain.
2. Lack of proper maintenance and off-season storage as described in the Owner`s Manual, improper mounting of the motor,
installation of parts or accessories that are not equivalent in design and quality to genuine Yamaha parts.
3. Operation of the motor at an rpm other than specified, improper propeller selection, use of lubricants, oils, and fuel/oil mixtures
that are not suitable for outboard motor use.
4. Damage as a result of accidents, collisions, contact with foreign materials, or submersion.
5. Growth of marine organisms on motor surfaces.
6. Normal deterioration.
 64C-9-18-6  2/19/03 9:13 AM  Page 6 
						

							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 removal of the motor from a boat and transporting the motor to and from an authorized
Yamaha outboard dealer are excluded from warranty coverage.
Specific parts excluded from the second year of warranty (if applicable) are:
8Top and Bottom Cowling
8Electric Components (other than ignition system)
8Rubber Components (such as hoses, tubes, rubber seals, fittings, and clamps)
TRANSFER OF WARRANTY.Transfer of the warranty from the original purchaser to any subsequent purchaser is possible by having the
motor inspected by an authorized Yamaha outboard dealer and requesting the dealer to submit a change of registration to Yamaha
Motor Corporation, U.S.A. within ten (10) days of the transfer.
EMISSION CONTROL SYSTEM WARRANTY.Yamaha warrants to the ultimate purchaser and each subsequent purchaser, that this
engine is designed, built, and equipped so as to conform at the time of sale with applicable regulations under section 213 of the Clean
Air Act and this engine is free from defects in materials and workmanship which cause said engine to fail to conform with applicable
regulations for one (1) year from date of purchase.
YAMAHA MOTOR CORPORATION, U.S.A. MAKES NO OTHER WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED. ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH EXCEED THE OBLIGATIONS AND
TIME LIMITS STATED IN THIS WARRANTY ARE HEREBY DISCLAIMED BY YAMAHA MOTOR CORPORATION, U.S.A. AND
EXCLUDED FROM THIS WARRANTY.
SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION
MAY NOT APPLY TO YOU. ALSO EXCLUDED FROM THIS WARRANTY ARE ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES
INCLUDING LOSS OF USE. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THE ABOVE EXCLUSION MAY NOT APPLY TO YOU.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE
TO STATE.
YAMAHA MOTOR CORPORATION, U.S.A.
Post Office Box 6555
Cypress, California 90630
WARRANTY QUESTIONS AND ANSWERS
Q. What costs are my responsibility during the warranty period?
A. The customer`s responsibility includes all costs of normal maintenance services, non-warranty repairs, accident and collision
damages.
Q. What are some examples of ``abnormal’’ strain, neglect, or abuse?
A. These terms are general and overlap each other in areas. Specific examples include:
Running the machine out of oil, operating the machine with a broken or damaged part which causes another part to fail, damage or
failure due to improper or careless transportation, and/or tie down. If you have any specific questions on operation or
maintenance, please contact your Yamaha outboard dealer for advice.
Q. Does the warranty cover incidental costs such as towing or transportation due to a failure?
A. No. The warranty is limited to repair of the machine itself.
Q. May I perform any or all of the recommended maintenance shown in the Owner’s Manual instead of having the dealer do them?
A. Yes, if you are a qualified mechanic and follow the procedures specified in the Owner’s and Service Manuals. We do recommend,
however, that items requiring special tools or equipment be done by a Yamaha outboard dealer.
Q. Will the warranty be void or canceled if I do not operate or maintain my new outboard exactly as specified in the Owner’s Manual?
A. No. The warranty on a new outboard cannot be ’’voided`` or ’’canceled``. However, if a particular failure is caused by operation or
maintenance other than as shown in the Owner’s Manual, that failure may not be covered under warranty.
Q. What responsibility does a Yamaha outboard dealer have under this warranty?
A. Each Yamaha outboard dealer is expected to:
1. Completely set up each outboard he sells prior to delivery.
2. Explain the operation, maintenance, and warranty requirements to your satisfaction at the time of sale, and upon your request
at any later date.
In addition, each Yamaha outboard dealer is held responsible for his setup, service and warranty repair work.
Q. Is the warranty transferable to second owners?
A. Yes. The remainder of any existing warranty can be transferred upon request. The unit has to be inspected and re-registered by an
authorized Yamaha outboard dealer for the policy to remain effective.
 64C-9-18-6  2/19/03 9:13 AM  Page 7 
						

							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 arises regarding warranty, first contact the owner of the dealership. Since all warranty matters are handled at the dealer level,
this person is in the best position to help you. If you are still not satisfied and require additional assistance, please write:
YAMAHA MOTOR CORPORATION U.S.A.
CUSTOMER RELATIONS DEPARTMENT
P.O.Box 6555
Cypress, California 90630
When contacting Yamaha Motor Corporation, U.S.A. don’t forget to include any important information such as names, addresses,
model, engine serial number, dates, and receipts.
CHANGE OF ADDRESS
The federal government requires each manufacturer of a motor vehicle to maintain a complete, up-to-date list of all first purchasers
against the possibility of a safety-related defect and recall. This list is complied from the purchase registrations sent to Yamaha Motor
Corporation, U.S.A. by the selling dealer at the time of your purchase.
If you should move after you have purchased your new outboard, please advise us of your new address by sending a postcard listing
your outboard model name, engine serial number, dealer number (or dealer’s name) as it is shown on your warranty identification, your
name and new mailing address. Mail to:
YAMAHA MOTOR CORPORATION, U.S.A.
WARRANTY DEPARTMENT
P.O.Box 6555
Cypress, California 90630
This will ensure that Yamaha Motor Corporation, U.S.A. has an up-to-date registration record in accordance with federal law.
 64C-9-18-6  2/19/03 9:13 AM  Page 8