Fuel Strainer, Fuel Lines, and Fittings

engine. Fuel is pumped through a strainer (16) to the

4-22. Fuel Strainer, Fuel Lines, and Fittings

carburetor (12), which is mounted on the intake

a. Fuel Strainer Service. If moisture or other

manifold. The carburetor provides a fuel-air mixture to

contaminants are visible through the glass bowl of the

the engine, and has several adjustments for smooth

fuel strainer, service the fuel strainer as follows:

engine operation.

(1) Close the shutoff valve (6, fig. 4-9) on the

c. The governor (9, fig. 4-8) controls the throttle

fuel strainer.

control of the carburetor (12) to provide the required

(2) Loosen the nut on the bail (1) and swing

engine speed, depending upon the setting of the manual

the bail aside to release the glass fuel bowl (2).

throttle.

The engine will maintain the set speed

Remove the bowl and gasket (3). Empty the contents of

regardless of load, provided the load applied does not

the bowl and wipe it dry with a clean cloth.

exceed the horsepower rating of the engine. Several

(3) If engine operation indicates that the filter

adjustment points are provided to assure proper engine

element (4) is contaminated, replace it with a new one.

governor control.

(4) Position the gasket (3) and fuel bowl (2)

d. The fuel system uses a primer pump and lines

on the fuel strainer housing (7). Swing the bail (1) into

which aid starting in cold weather or after the engine has

position and tighten the bail nut to hold the bowl in

been idle for a considerable length of time. The primer

place.

pump pumps raw fuel into the intake manifold to provide

(5) Open the fuel shutoff valve (6) and check

fast starting.

for leaks. Correct any leaks.

b. Removal. Remove the fuel strainer and the fuel

lines and fittings as shown in figure 4-10 and items 1

through 7 of figure 4-11.

Screw

9. Tube nut

Pointer

10. Adapter

Screw

11. Fuel source selector

Nut

3-way valve

Lockwasher

12. Nipple

Position plate

13. Elbow

Tube

14. Bushing

Tube nut

Figure 4-10. Fuel lines and fittings, exploded view.

Bail

5 Filter gasket

Fuel bowl

6 Fuel shutoff valve

Bowl gasket

7. Fuel strainer housing

Filter element

Figure 4-9. Fuel strainer, exploded view.

4-13