(2)
Crank the engine slowly by hand and
(3)
Connect the governor linkage (18) to
see if fuel comes out of the line at the
the governor arm (19), by installing
carburetor.
the nut on top of the governor arm.
(3)
If the line between the fuel tank and
(4)
Connect the fuel pump primer lever
the fuel pump is open, and sufficient
(2) to the top of the carburetor (7).
fuel in the fuel tank, but the fuel pump
(5)
Connect the choke control linkage (6)
fails, it is defective and must be
to the choke lever (7, fig. 20), by
replaced.
tightening the cap screw on the choke
b.
Removal.
lever.
(6)
Connect the fuel line (5) at the
(1)
Disconnect the fuel tank line (20, fig.
carburetor (19) inlet connection.
21), and the carburetor fuel line (19).
(7)
Connect the idle linkage (20) to the
(2)
Disconnect the fuel primer lever (1)
carburetor.
from the fuel pump (17).
(8)
Install the air cleaner (par. 108d).
(3)
Remove two screws (16) and
lockwashers, and remove fuel pump
d.
Adjustment.
(17) from the engine block.
(1)
Allow the engine to thoroughly warm
(4)
Lift the fuel pump upward and off the
up and adjust the main adjusting
engine block.
needle (12, fig. 20) with a full load
(5)
Remove the two fuel pump mounting
connected.
gaskets (14) and the spacer (15) from
(2)
Turn the main adjusting needle (12) in
the crankcase.
slowly until the speed and power
c.
Cleaning, Inspection, and Repair.
begin to drop.
(3)
Turn the adjusting needle (12) out
(1)
Clean the fuel pump using
an
slowly, to the point where the highest
approved cleaning solvent.
speed is reached.
(2)
Replace the fuel pump mounting
(4)
Turn the adjusting needle (12) 1/4 turn
gaskets.
farther out for the final setting.
(3)
Inspect the fuel pump body for casting
(5)
Adjust the idle needle (5, fig. 7) with
defects, and damaged threads which
all load disconnected.
would cause fuel leakage.
(6)
Pull the throttle linkage (8) out to idle
(4)
Replace the fuel pump if any defects
engine.
are found.
(7)
Turn the idle adjusting needle (5) out
(5)
Inspect and replace the fuel pump
slowly until the engine starts to run
mounting cap screws and lockwashers
unevenly.
if necessary.
(8)
Turn the idle adjusting needle in, to
d.
Installation.
the point where engine speed is at the
(1)
Install the fuel pump mounting
highest point and operation is steady.
gaskets (14), and spacer (15) on the
Caution:
(2)
Install the fuel pump (17) on the
Never turn the adjusting needles
gaskets and spacers, being sure that
tightly into their seats. Doing so may
the fuel pump rocker arm is on the
form a ridge or ring on the tapered
right side of the fuel pump cam lobe.
end, which will make proper
adjustment impossible.
(3)
Install the two fuel pump screws (16)
and lockwashers which secure the
111. Fuel Pump
fuel pump to the engine block.
a.
Testing.
(4)
Connect the fuel pump primer lever
(1)
Disconnect the fuel line (5, fig. 20) at
(1) to the fuel pump.
the carburetor (19).
(5)
Connect the fuel tank line (20) and
51