MSD 8353 Ford Front Mount Flathead Pro-Billet Distributor Installation - Manual (Page 4)

4 INSTALLATION INSTRUCTIONS
AUTOTRONIC CONTROLS CORPORATION • 1490 HENRY BRENNAN DR., EL PASO, TEXAS 79936 • (915) 857-5200 • FAX (915) 857-3344
Figure 6 Changing the Advance Stop Bushing.
SELECTING THE ADVANCE STOP
BUSHING
Three different advance stop bushings are
supplied in the distributor kit. The distributor
comes with a Blue (21°) bushing already
installed. If a different amount of centrifugal
advance is desired, follow the next procedure
to change the bushings. The chart in Figure 5
gives the size and approximate degrees for the
corresponding bushings.
CHANGING THE ADVANCE STOP
BUSHINGS
1. Remove the distributor cap and rotor.
2. Note the position of the coupling drive in
relation to the rotor tip. Remove the coupling
drive and slide the distributor shaft up.
3. Remove the locknut and washer on the
bottom of the advance assembly (Figure 6).
4. Remove the bushing and install the new one.
Install the washer and locknut. Do not
overtighten.
LOCKING OUT THE CENTRIFUGAL
ADVANCE
1. Remove the advance components including
the springs, weights and the advance stop
bushing from the advance assembly.
2. Note the position of the coupling drive in
relation to the rotor tip. Remove the coupling
drive and slide the distributor shaft up.
3. Rotate the shaft 180° and insert the advance
stop bushing pin into the small hole on the
advance plate (Figure 7).
4. Install the locknut and washer to the advance
stop bushing pin. This locks the advance in
place.
5. Install the retaining screw in the shaft.
Figure 6 Locking Out the Centrifugal Advance.
Figure 7 Locking Out the Advance.
Figure 5 Advance Stop Bushing Chart.
BUSHING SIZE APPROXIMATE
CRANKSHAFT
DEGREES
Red-Smallest 28
Silver 25
Blue 21
Black-Largest 18