Pre-Operating Preparations; Fuel Handling - TOHATSU MFS 30C Owner's Manual

28

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 satisfac-
torily when using a major brand of
6
unleaded gasoline meeting the following
specifications:
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 — U s e
unleaded gasoline with declared octane
rating of 91 RON or over. Use of pre-
mium 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
CAUTION
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
suspected 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
frequently.
And, in case any of such abnormality is
found, discontinue the use of such gas-
oline and contact our dealer immedi-
ately.
If the outboard motor will only be used
infrequently, please see the remarks on
fuel deterioration in the STORAGE chap-
ter (P 78) 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 trou-
ble, 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 protective oil
films from internal components.