Evinrude 4906B 4HP 1969 Owner's Manual page 13

1-8 SAFETY
Taking On Fuel
The fuel tank of your boat should be kept
full to prevent water
system through condensation caused by tem-
perature changes. Water droplets forming is
one of the greatest
system. By keeping the tank full, the air
space in the tank is kept to an absolute
minimum and there is no room for moisture
to form. It is a good practice
fuel in the tank over an extended period, say
for six months. Today, fuels contain ingre-
dients that change into gums when stored
for any length of time.
varnish products will cause carburetor
lems and poor spark plug performance.
additive (Sta-Bil) is available
used to prevent gums and varnish
forming.
Static Electricity
In very simple terms, static electricity
called fr icti onal electr ici ty. It is generated
by two dissimilar
each other. One form is gasoline flowing
through a pipe or into the air. Another form
is when you brush your hair or walk across a
synthetic carpet and then touch a metal
object. All of these actions cause an elec-
trical charge. In most cases, static electri-
city is generated during very dry weather
conditions, but when you are filling the fuel
tank on your boat it can happen at any time.
Fuel Tank Grounding
One area of protection
up of static electricity
An OMC fuel tank equipped with
fitting. This type of arrangement
be removed
tank must from the boat
from entering the
enemies of the fuel
not to store
These gums and
prob-
and can be
from
materials moving over
against the build-
is to have the fuel
a quick-disconnect
is handy when the
to
obtain fuel.
An
Old style pressure-type
the engine and quick-disconnect
tank properly grounded (also known as bond-
ing). A direct metal-to-metal
the fuel hose nozzle to the water in which
is the boat is floating.
of metal, and the fuel nozzle makes a good
contact with the deck plate,
ground is made.
As an economy measure, some boats use
rubber or plastic
compound bends in the pipe. Such a fill line
does not give any kind of ground and if your
boat has this type of installation
Adding fuel
fuel must be in the tank before oil is added
the oil from accumulating
tank showing the fuel line
fitting.
contact from
If the fill pipe is made
then a good
filler pipes because
and you do
to a six-gallon OMC fuel tank.
on
the tank bottom.
to
of
Some
to prevent