washer (14) securing throttle control rod (13) to the governor control shaft lever (19, fig. 25).
(2) Remove nut (15, fig. 21) and lockwasher (14) securing throttle control rod to carburetor.
b. Installation.
(1) Position throttle control rod stud in carburetor throttle lever and secure with lockwasher (14, fig. 21)
and nut (15).
(2) Position throttle control rod stud in governor control shaft lever (19, fig. 25) and secure with
lockwasher (14, fig. 21) and nut (15).
(3) Adjust governor controls (para. 74).
80. Engine Fuel Pump, Adapter and Priming Mechanism
a. General. The engine fuel pump adapter operates the fuel pump by pulling down a flexible diaphragm
which pulls fuel from the fuel tank to the carburetor. A plunger housed in the fuel pump adapter
actuates a rocker arm and link assembly which actuates the fuel pump diaphragm. The plunger rides
on an eccentric of the camshaft. The fuel pump can be operated by a hand priming lever on the fuel
pump adapter if the eccentric on the camshaft is in the low position so the plunger can be operated.
b. Removal.
(1) Remove the canopy (para. 68) and fuel lines.
(2) Remove the two capscrews (12, fig. 27) and lockwashers (11) securing the fuel pump and adapter
to the crankcase and remove the adapter and gasket.
c. Disassembly.
(1) Remove two bolts (7, fig. 27) and lockwashers (8) securing fuel pump ( ) to adapter. Remove
6
pump and gasket (9).
(2) Remove the plunger cap and the plunger from the adapter (4).
1
Setscrew
4 Adapter housing
7 Capscrew
10 Gasket
2
Shaft
5 Primer control
8 Lockwasher
11 Lockwasher
3
Lever
6 Fuel pump
9 Gasket
12 Capscrew
Figure 27. Fuel pump and fuel pump adapter assembly.
AGO 6871A
46
