Evinrude 4906B 4HP 1969 Owner's Manual page 197

6-8 ELECTRICAL
lamp on the dash should light.
light, check for a burned-out bulb or a break
in the wiring to the light.
THERMOMEL T STICKS
Thermomel t sticks are an easy method
of determining if the engine is running at
the proper temperature.
are not expensive and are available at your
local mar ine dealer.
Start the engine with the propeller in the
water and run it for about 5 minutes
roughly 3000 rpm.
CAUTION: Water must circulate through
the lower unit to the engine any time the en-
gine is run to prevent
pump in the lower unit. Just five seconds
without water will damage the water pump.
The 140 degree stick should melt when
you touch it to the lower thermostat
or on the top cylinder.
the thermostat is stuck in the open position
and the engine temperature
Touch the 170 degree stick to the same
spot on the lower thermostat
the top cylinder. The stick should not melt.
If it does, the thermostat
closed position or the water
operating properly
running too hot. For service procedures on
the cooling system, see Chapter 8.
A thermomelt stick is
and fairly accurate method
temperature.
If it does not
Thermomelt sticks
damage to the water
housing
If it does not melt,
is too low.
housing or on
is stuck in the
pump is not
because the engine
a quick, simple, inexpensive,
to
determine engine running
6-5 FUEL SYSTEM
FUEL GAUGE
The fuel gauge is intended
the quantity
experienced
reading is seldom an accurate
fuel available in the tank.
for this false reading is because the boat is
rarely on an even keel.
difference in fuel quantity will be indicated
at
by the gauge if the bow or stern is heavy, or
if the boat has a list to port or starbaord,
Therefore,
The amount of fuel drawn from the tank is
dependent on the location of the fuel pickup
tube in the tank.
while cruising because
above of the fuel level.
the tank is empty, shift weight in the boat
to change the trim and the problem may be'
solved until you are able to take on more
fuel.
FUEL GAUGE HOOKUP
The Boating Industry Association recom-
mends the following color coding be used on
is
all fuel gauge installations:
Black -- for all grounded current-carry-
ing conductors.
Pink -- insula ted wire for the fuel gauge
sending unit to the gauge.
Red -- insula ted wire for a connection
from the positive side of the battery
electr ical equipment.
Connect one end of a pink insulated wire
to the terminal on the gauge marked TANK
and the other end to the terminal
the tank unit.
Connect one end of a black wire to the
terminal on the fuel gauge marked IGN and
the other end to the ignition switch.
Schematic for
of fuel in the tank.
boatman has learned, the gauge
report of the
The main reason
A considerable
the reading is usually
The engine may cutout
the pickup tube is
Instead of assuming
IGNITION
•••• TTERT
SWITCH
TANK
THROUGH
a safe fuel tank gauge hookup.
to indicate
As the
low.
to any
on top of
GROUNDED
FRAME