Pre-Operating Preparations; Fuel Handling - TOHATSU MFS 9.9E Series Owner's Manual

PRE-OPERATING PREPARATIONS

ENOM00030-A

1. Fuel handling

ENOW000017-0
CAUTION
Use of improper gasoline can damage your
engine. Engine damage resulting from the
use of improper gasoline is considered mis-
use of the engine, and damage cause d
thereby will not be covered under the lim-
ited warranty.
ENOM00031-A
FUEL RATING
TOHATSU engines will operate satisfacto-
rily when using a major brand of unleaded
gasoline meeting the following specifica-
tions:
USA and Canada — having a posted
pump Octane Rating of 87 (R+M)/2 mini-
mum. Premium gasoline (92 [R+M]/2
Octane) is also acceptable. Do not use
leaded gasoline.
O u t s i d e U S A a n d C a n a d a — Us e
unleaded gasoline with declared octane
rating of 91 RON or over. Use of premium
gasoline of 98 RON is also allowed.
ENOM00032-A
GASOLINES CONTAINING
ALCOHOL
The fuel system components on your
TOHATSU engine will withstand up to 10%
ethyl alcohol (hereinafter referred to as
the "ethanol"), content in the gasoline.
But even if the gasoline in your area con-
tains ethanol less than 10%, you should
be aware of certain adverse effects that
can occur. Increasing the percentage of
ethanol in the fuel can also worsen these
adverse effects. Some of these adverse
effects are caused because the ethanol
in the gasoline can absorb moisture from
the air, resulting in a separation of the
water/ethanol from the gasoline in the
fuel tank.
These may cause increased:
Corrosion of metal parts
Deterioration of rubber or plastic parts
Fuel permeation through rubber fuel
lines
Starting and operating difficulties
If the use of gasoline containing alcohol is
inevitable, or presence of alcohol is sus-
pected in the gasoline, it is recom-
mended to add a filter that has water
separating capability, and check the fuel
system for leaks and mechanical parts for
corrosion and abnormal wear more fre-
quently.
And, in case any of such abnormality is
found, discontinue the use of such gaso-
line and contact our dealer immediately.
If the outboard motor will only be used
infrequently, please see the remarks on
fuel deterioration in the STORAGE chap-
ter (P 72) for additional information.
ENOW00020-1
CAUTION
When operating a TOHATSU engine on gaso-
line containing alcohol, storage of gasoline in
the fuel tank for long periods should be
avoided. Long periods of storage, create
unique problems. In cars, alcohol blend fuels
normally are consumed before they can
absorb enough moisture to cause trouble,
but boats often sit idle long enough for
phase separation to take place. In addition,
internal corrosion may take place during
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