2007 Yamaha Outboard 50 Boat Motor Owners Manual

Specifications and requirements
comends  that   you  use   alcohol-free  (see     al fuel system maintenance.
Gasohol) gasoline whenever possible.
EMU27270
Ring Free Fuel Additive
Recommended gasoline:
Gasoline is a precise blend of many different
substances,  each  chosen   to  give  certain
characteristics. Gasoline  blends have  been
changing in recent years in response to con-
cerns  about  pollution  and  resulting   emis-
sions regulations.  One of the  most obvious
changes  has  been the  elimination  of  lead
Do  not  use  leaded  gasoline.   Leaded    from most fuels.
gasoline can seriously damage  the en-
gine.
Regular unleaded gasoline with a min-
imum Octane rating of 86
(
Pump Octane Number) = (R+M)/2
ECM01981
NOTICE
q
As gasoline has changed, the amount of ad-
ditives  such as  aromatics  and  oxygenates
q
Avoid getting  water and  contaminants    has  increased. These  additives  are impor-
in the fuel tank.  Contaminated fuel can
cause   poor   performance   or   engine
damage.  Use only  fresh  gasoline that
has been stored in clean containers.
tant for  the engines  in passenger  cars, but
they can have  detrimental effects in  marine
engines,  because of  increased  deposits in
the combustion chamber. When enough de-
Gasohol
posits  collect,  piston  rings  begin  sticking.
There are two types of gasohol: gasohol con-   Performance  drops   and  engine  wear   in-
taining  ethanol  (E10)  and  that   containing    creases dramatically.
methanol. Ethanol can be used if the ethanol   While  many additives available  may reduce
content does  not exceed  10% and  the fuel    deposits,  Yamaha  recommends the  use of
meets the minimum octane ratings. E85 is a     Ring  Free  Fuel  Additive,  available  from
fuel containing 85% ethanol and must not be    your Yamaha dealer. Ring Free Fuel Addi-
used  in  your  outboard  motor.  All  ethanol     tive has repeatedly proven its ability to clean
blends  containing  more than  10%  ethanol    combustion  deposits from inside the engine,
can cause fuel system damage or cause en-    notably the critical piston-ring-land area, and
gine starting and running problems. Yamaha    fuel system components.  Follow product la-
does  not   recommend  gasohol  containing     beling for use instructions.
methanol because it  can cause fuel system
damage or engine performance problems.
It is  recommended that you  install a  water-
separating  marine  fuel  filter assembly  (10
micron minimum)  between  your boats  fuel
tank and  outboard motor  when using  etha-
nol. Ethanol is known to allow moisture to be
absorbed into  boat fuel tanks and  systems.
Moisture in  the fuel can  cause corrosion  of
metallic  fuel  system  components,  starting
and running complaints and require addition-
EMU36880
Muddy or acidic water
Yamaha strongly recommends that you have
your  dealer  install  the optional  chromium-
plated water pump kit if you use the outboard
motor in  muddy or  acidic water  conditions.
However, depending  on the  model it  might
not be required.
EMU36330
Anti-fouling paint
A clean hull improves boat performance. The
boat bottom should be  kept as clean of ma-
16
Product Specification
CategoriesMarine, Yamaha Outboard Manuals
Document TypeBoat Motor Manual Free Download. Marine Operator's Boating Guide.
Tags
Model Year2007
Download File
Please Enter the Security Characters Shown Below. Letters are Case Sensitive. Your download link will appear upon completing this step.
- 90 pages
LanguageEnglish
Product BrandYamaha Motor. Yamaha Motor Corporation, USA - Support Customer Relations for US: 1-800-962-7926
Yamaha Boats: 1-800-962-7926
Yamaha Outboard Customer Relations: 1-866-894-1626 , Yamaha Outboard
Document File TypePDF
Publisheryamaha-motor.com
Wikipedia's PageYamaha Motor Company
CopyrightAttribution Non-commercial
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