Evinrude 4906B 4HP 1969 Owner's Manual page 97

4-6 FUEL
If the choke should stick in the open
position, the engine will be hard to start. If
the choke should stick in the closed position,
the engine will flood making
cult to start.
In order for this raw fuel to vaporize
enough to burn, considerable
added to lean out the mixture.
the only remedy is to remove
plug/s; ground the leads; crank the engine
through about 10 revolutions;
plugs; install the plugs again; and start the
engine.
If the needle valve and seat assembly is
leaking, an excessive
enter the intake manifold in the following
manner: After the engine is shut down, the
pressure left in the fuel line will force fuel
past the leaking needle valve.
fuel will raise the level in the fuel bowl and
cause fuel to overflow into the intake mani-
fold.
A continuous overflow
intake manifold may be due to a sticking
inlet needle or to a defective
would cause an extra
the bowl and overflow into the intake mani-
fold.
FUEL PUMP TESTS
CAUTION: Gasoline will be flowing in the
engine area during this test. Therefore, guard
against fire by grounding the high-tension
wire to prevent it from sparking.
CHOKE VALVE
a
The choke plays most important
start and in controlling the amount
carburetor, under various load conditions.
it
VERY diffi-
air must be
Therefore,
the spark
clean the
amount of fuel may
This extra
of fuel into the
float which
high level of fuel in
role during engine
of air
entering the
Grounding the spark plug 'wires during fuel tests
prevent an accidental spark
vapors. Exercise care when working on the fuel system.
Testing System with Squeeze Bulb
An adequate safety method, is to ground
each spark plug lead.
line at the carburetor.
container over the end of the fuel line to
catch the fuel discharged.
screwdriver into the end of the line to open
the check valve, and then squeeze the prim-
er bulb and observe if there is satisfactory
fuel flow from the line.
The fuel line quick-disconnect
in
separated preparation
from igniting fuel or
Disconnect the fuel
Place a suitable
Insert a small
fitting at the engine
to a [lir»
making fuel test.
~
to
fuel