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20
PRE-OPERATING PREPARATIONS
ENOM00030-A
1. Fuel handling
ENOW000017-0
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
6
gasoline meeting the following specifica-
tions:
USA and Canada — having a posted pump
Octane Rating of 87 (R+M)/2 minimum.
Premium gasoline (92 [R+M]/2 Octane) is
also acceptable. Do not use leaded gaso-
line.
O u t s i d e U S A a n d C a n a d a — U s 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 (hererinafter referred to as
the "ethanol"), content in the gasoline.
But if the gasoline in your area contains
ethanol, you should be aware of certain
adverse effects that can occur. Increas-
ing the percentage of ethanol in the fuel
can also worsen these adverse effects.
CAUTION
Some of these adverse effe c ts are
caused because the ethanol in the gaso-
line 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 51) for additional information.
ENOW00020-0
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, common
to boats, 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 storage if alcohol has washed
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