Pre-Operating Preparations; Fuel Handling - TOHATSU MFS 4D 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.
ENOM00031-1
FUEL RATING
Use only major brand unleaded fuel
meeting the following specifications:
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.
ENOM00032-1
GASOLINES CONTAINING
ETHANOL
The fuel system components on your
TOHATSU outboard motor will withstand
up to 10% ethyl alcohol (hereinafter
referred to as the "ethanol") content in
the gasoline. If the gasoline in your area
contains ethanol, be aware of certain
adverse effects that can occur. Increas-
ing the percentage of ethanol in the fuel
can also worsen these adverse effects.
Some of these adverse effec ts are
caused by ethanol absorbing moisture in
the air, which leads to separation of the
water/ethanol from the gasoline in the
fuel tank.
Use of gasoline containing ethanol may
accelerate:
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 ethanol
cannot be avoided or presence of etha-
nol is suspected in the gasoline, it is rec-
ommended to use a filter to separate
water, and frequently check the fuel sys-
tem for leaks, mechanical parts for cor-
rosion and abnormal wear.
In case any of such abnormality is found,
discontinue the use of such gasoline 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 64) for additional information.
ENOW00975-0
CAUTION
When operating an outboard motor with
gasoline containing ethanol, storing gasoline
in the fuel tank for long periods should be
avoided. Storing gasoline for long periods
creates unique problems. In cars, ethanol
blended fuels are normally consumed before
they can absorb enough moisture to cause
problems, but boats often sit idle long
enough for separation phase to take place.
In addition, internal corrosion may take
place during storage if ethanol washes away
the oil films protecting internal components.
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