RA PD 310281
Figure 51—Circuit Breaker Marks and Flywheel Mark Correctly Alined
(3) Remove plug from timing inspection hole in left‐side crankcase.
(4) Continue turning engine slowly until flywheel timing mark is in center of inspection hole ([fig. 51]). Do not turn engine further.
(5) Install paper gasket and timer head tension (ground) spring on timer shaft base assembly. Make sure bent ends of tension spring are facing downward (away from timer base).
(6) Insert timer shaft and base assembly all the way down into place in timing gear case cover, trying to locate mark on small end of breaker cam in position shown in figure 51. Do not install base mounting screws as yet.
(7) Install timer head assembly so that spark control lever is within the advance and retard quadrant ([fig. 51]). NOTE: Do not install cover retainer until later.
(8) Fully advance spark lever (push inward toward engine) and observe how closely mark on breaker cam lines up with breaker lever fiber. If mark does not line up, lift timer base and turn shaft gear so its engagement with its driving gear is changed one tooth. Check again according to breaker cam mark and breaker lever fiber. Repeat this procedure until gear engagement is obtained which closely alines cam mark and breaker lever fiber.
(9) See that timer base is turned so that timer to coil wire is toward rear of engine.
(10) Install timer base screws and lock washers. Make sure that timer to coil wire shielding is grounded under head of screw farthest away from engine ([fig. 52]). Securely tighten screws.
(11) Install timer head on base and secure with ground spring and cover retainer. Be sure ground spring is in its proper place so that when cover retainer ends are fitted through holes in the timer head, they will also fit into spring locating notches. It will be necessary to press ground spring upward under timer base to engage retainer ends in the spring notches. NOTE: If cover retainer ends do not engage ground spring notches, spring will have no tension and timer head will be loose on its base. Circuit breaker points and condenser are electrically grounded through timer base, and ground spring holds the head and base in close contact, thus assuring a good ground.