Figure 4-13. Magneto and governor installation.

Magneto

5. Nut

10. Speed adjusting lock screw

Nut

6. Throttle rod ball joint

11. Speed adjusting screw

Magneto ground strap

7. Throttle operating lever

12. Sensitivity adjusting screw

Governor-to-carburetor

8. Mounting screw

13. Governor spring

control rod

9. Surge adjusting screw

Figure 4-13. Magneto and governor installation.

locking nut. If the carburetor and linkage are properly

(3) Inspect the governor for cracks, and

adjusted, surge will disappear.

missing parts, wear, and other obvious damage. Check

the rotation of the governor drive shaft. It must turn

(6) When the governor adjustment is

freely without catching or binding. Check the movement

completed, tighten the speed adjusting lock screw (10)

of the governing shaft in its needle bearings. It must

to lock the cam in position. Make sure all locking nuts

pivot freely without catching or binding and without

are tightened.

excessive play. Refer a damaged governor to direct

b. Removal.

support maintenance.

(1) Disconnect the ball joint (16, fig. 4-11) on

d. Installation.

governor-to-carburetor control rod (18) from the lever on

(1) Install the governor by reversing the removal

the governor.

procedure. Refer to items 27 through 37 in figure 4-11.

(2) Remove the governor and related parts as

(2) Adjust the governor as directed in sub-paragraph a

shown in items 27 through 37, figure 4-11.

above.

c. Cleaning and Inspection.

4-26. Primer Pump, Lines, and Fittings

(1) Clean the exterior of the governor with a

a. Removal. Remove the primer pump, lines, and

cloth dampened with cleaning solvent (fed. spec. P-D-

fittings as shown in figure 4-14.

680). Wipe dry.

b. Cleaning and Inspection.

(2) Clean all remaining parts with cleaning

(1) Clean the exterior of the primer pump with

solvent (fed. spec. P-D-680) ; dry thoroughly.

a cloth dampened with cleaning solvent

4-17