Yamaha 90A User manual

Read this manual carefully before operating this
outboard motor.
OWNER’S MANUAL
90A
6H1-28199-2A-E0
6H1-9-2A-1E0.book 1 ページ ２０１０年２月１７日 水曜日 午前１０時４２分

EMU25052
Read this manual carefully before operating 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.
6H1-9-2A-1E0.book 1 ページ ２０１０年２月１７日 水曜日 午前１０時４２分

Important manual information
EMU25107
To the owner
Thank you for selecting a Yamaha outboard
motor. This Owner’s Manual contains infor-
mation needed for proper operation, mainte-
nance and care. A thorough understanding
of these simple instructions will help you ob-
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
information is distinguished in the following
ways.
: This is the safety alert symbol. It is
used to alert you to potential personal injury
hazards. Obey all safety messages that fol-
low this symbol to avoid possible injury or
death.
WARNING
EWM00781
A WARNING indicates a hazardous situa-
tion which, if not avoided, could result in
death or serious injury.
NOTICE
ECM00701
A NOTICE indicates special 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 prod-
uct information available at the time of print-
ing, there may be minor discrepancies
between your machine and this manual. If
there is any question concerning this manu-
al, please consult your Yamaha dealer.
To ensure long product life, Yamaha recom-
mends that you use the product and perform
the specified periodic inspections and main-
tenance by correctly following the instruc-
tions in the owner’s manual. Any damage
resulting from neglect of these instructions is
not covered by warranty.
Some countries have laws or regulations re-
stricting users from taking the product out of
the country where it was purchased, and it
may be impossible to register the product in
the destination country. Additionally, the war-
ranty may not apply in certain regions. When
planning to take the product to another coun-
try, consult the dealer where the product was
purchased for further information.
If the product was purchased used, please
consult your closest dealer for customer re-
registration, and to be eligible for the speci-
fied services.
TIP:
The 90AETO and the standard accessories
are used as a base for the explanations and
illustrations in this manual. Therefore some
items may not apply to every model.
EMU25121
90A
OWNER’S MANUAL
©2010 by Yamaha Motor Co., Ltd.
1st Edition, March 2010
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in Japan
6H1-9-2A-1E0.book 1 ページ ２０１０年２月１７日 水曜日 午前１０時４２分

Table of contents
Safety information............................. 1
Outboard motor safety .....................1
Propeller............................................ 1
Rotating parts.................................... 1
Hot parts ........................................... 1
Electric shock.................................... 1
Power trim and tilt ............................. 1
Engine shut-off cord (lanyard)........... 1
Gasoline............................................ 1
Gasoline exposure and spills ............ 2
Carbon monoxide.............................. 2
Modifications ..................................... 2
Boating safety .................................. 2
Alcohol and drugs ............................. 2
Personal flotation devices ................. 2
People in the water ........................... 2
Passengers ....................................... 2
Overloading....................................... 2
Avoid collisions ................................. 3
Weather ............................................ 3
Passenger training ............................ 3
Boating safety publications ............... 3
Laws and regulations ........................ 3
General information .......................... 4
Identification numbers record...........4
Outboard motor serial number .......... 4
Key number....................................... 4
EC Declaration of Conformity
(DoC).............................................. 4
CE Marking ...................................... 4
C-Tick label ...................................... 5
Read manuals and labels................. 6
Warning labels ................................. 6
Specifications and requirements..... 9
Specifications ................................... 9
Installation requirements ................ 10
Boat horsepower rating................... 10
Mounting motor ............................... 10
Remote control requirements.........10
Battery requirements...................... 10
Battery specifications ...................... 10
Mounting battery ............................. 10
Multiple batteries............................. 11
Propeller selection.......................... 11
Start-in-gear protection .................. 11
Engine oil requirements ................. 11
Fuel requirements.......................... 11
Gasoline .......................................... 11
Muddy or acidic water.................... 12
Anti-fouling paint ............................ 12
Motor disposal requirements.......... 12
Emergency equipment................... 12
Components .................................... 13
Components diagram..................... 13
Fuel tank ......................................... 13
Fuel joint.......................................... 14
Fuel gauge ...................................... 14
Fuel tank cap................................... 14
Air vent screw.................................. 14
Remote control box ......................... 14
Remote control lever ....................... 14
Neutral interlock trigger ................... 15
Neutral throttle lever........................ 15
Tiller handle..................................... 15
Gear shift lever................................ 15
Throttle grip ..................................... 15
Throttle indicator ............................. 16
Throttle friction adjuster................... 16
Engine shut-off cord (lanyard) and
clip................................................. 16
Engine stop button .......................... 17
Main switch ..................................... 17
Steering friction adjuster ................. 18
Power trim and tilt switch on
remote control or tiller handle ....... 18
Power trim and tilt switch on
bottom cowling .............................. 18
Trim tab with anode......................... 19
Tilt support lever for power trim
and tilt model................................. 19
Cowling lock lever(s) (turn type)...... 20
Flushing device ............................... 20
Instruments and indicators............ 21
Digital tachometer .......................... 21
Tachometer ..................................... 21
Trim meter....................................... 21
Hour meter ...................................... 21
Oil level indicator (digital type) ........ 22
Overheat-alert indicator................... 22
Digital speedometer ....................... 22
6H1-9-2A-1E0.book 1 ページ ２０１０年２月１７日 水曜日 午前１０時４２分

Table of contents
Speedometer .................................. 22
Fuel gauge ...................................... 23
Trip meter / Clock / Voltmeter ......... 23
Fuel level-alert indicator.................. 24
Low battery voltage-alert
indicator ........................................ 24
Analog tachometer ......................... 24
Oil level indicators (three
indicators) ..................................... 24
Analog speedometer ...................... 25
Analog trim meter........................... 25
Hour meter ..................................... 25
Engine control system.................... 26
Alert system ................................... 26
Overheat alert ................................. 26
Oil level alert and oil filter clogging
alert............................................... 26
Installation ....................................... 28
Installation ...................................... 28
Mounting the outboard motor.......... 28
Operation ......................................... 30
First-time operation ........................ 30
Breaking in engine .......................... 30
Getting to know your boat ............... 30
Checks before starting engine .......30
Fuel level......................................... 31
Remove cowling.............................. 31
Fuel system..................................... 31
Controls........................................... 31
Engine shut-off cord (lanyard)......... 32
Oil.................................................... 32
Engine............................................. 32
Operation after a long period of
storage.......................................... 32
Flushing device ............................... 33
Install cowling.................................. 33
Checking power trim and tilt
system .......................................... 34
Battery............................................. 35
Filling fuel and engine oil................ 35
Filling fuel for portable tank............. 35
Filling oil for electric start models.... 36
Oil level indicator operation............. 37
Operating engine............................ 37
Sending fuel (portable tank)............ 37
Starting engine ................................ 38
Checks after starting engine .......... 41
Cooling water .................................. 41
Warming up engine........................ 41
Electric start and prime start
models .......................................... 41
Checks after engine warm up ........ 41
Shifting ............................................ 41
Stop switches .................................. 41
Shifting........................................... 41
Stopping boat................................. 43
Stopping engine............................. 43
Procedure........................................ 43
Trimming outboard motor............... 44
Adjusting trim angle (Power trim
and tilt) .......................................... 44
Adjusting boat trim .......................... 45
Tilting up and down........................ 46
Procedure for tilting up (power trim
and tilt models).............................. 46
Procedure for tilting down (power
trim and tilt models)....................... 48
Shallow water................................. 49
Power trim and tilt models............... 49
Cruising in other conditions............ 50
Maintenance .................................... 51
Transporting and storing outboard
motor............................................ 51
Storing outboard motor ................... 51
Procedure........................................ 52
Lubrication (oil injection models)..... 53
Flushing power unit ......................... 53
Cleaning the outboard motor........... 54
Checking painted surface of
outboard motor.............................. 54
Periodic maintenance .................... 54
Replacement parts .......................... 54
Severe operating conditions............ 55
Maintenance chart 1........................ 56
Maintenance chart 2........................ 58
Greasing.......................................... 59
Cleaning and adjusting spark
plug ............................................... 59
Checking fuel filter........................... 60
Inspecting idle speed ...................... 60
6H1-9-2A-1E0.book 2 ページ ２０１０年２月１７日 水曜日 午前１０時４２分