Mallory Ignition Mr_Gasket 52000 SERIES MAGNETIC BREAKERLESS DISTRIBUTORS - Manual (Page 3)

3 ACCEL www.mrgasket.com
FIGURE 3
produce 10° advance (crank) at 10" of vacuum. The vacuum
advance can be adjusted by inserting a 3/32" Allen wrench into
the hose nipple on the vacuum chamber. Turn the wrench
clockwise to increase advance, counterclockwise to decrease.
See figure #7.
NOTE: Check local smog laws before adjusting the vacuum
advance.
In most cases, the vacuum advance hose should be connected to
a ported vacuum outlet on the carburetor. This is the same
location as stock. However, in some cases where a very large
camshaft is used, connecting the vacuum hose to full manifold
vacuum (near the bottom of the carburetor) will improve idle.
Vacuum Advance Lockout
If the vacuum advance is not going to be used (such as for
racing), the vacuum advance chamber can be removed and
replaced with the enclosed lockout. The lockout covers the hole in
the distributor housing and prevents the pickup plate from rotating.
To remove the vacuum chamber, you must remove the distributor
gear (and lower collar if so equipped) and remove the shaft
assembly. Remove the clip holding the pickup mounting plate
assembly. Next, remove the 2 screws holding the vacuum
chamber and the clip on the control rod. Place the lockout plate
in the distributor, making sure the pin projects through the hole in
the pickup plate assembly. Secure the lockout with the 2 screws
and retaining clip. Re-assembly the distributor.
NOTE: Check local smog laws before removing the vacuum
advance chamber.
INSTALLATION
Installing an ACCEL 52000 distributor and setting the timing is
done in much the same way as a stock distributor (see a repair
manual for more information). If another distributor is already
installed (and correctly timed) note the direction the rotor is
pointing before removing the distributor. Transfer the plug wires
to the ACCEL cap in the same order and relative locations. Install
FIGURE 4
ADVANCE
WEIGHTS
ADVANCE
SPRINGS
FIGURE 6
REMOVE STOP
BUSHING IF
INSTALLED
ROTATE
SHAFT
180º
PULL
SHAFT
UP
STOP
BUSHING PIN
REMOVE
SPRINGS
REMOVE
CLIP
SMALL
HOLE
FIGURE 5
STOP BUSHING PIN
CLIP
STOP BUSHING
IF INSTALLED
BUSHING SIZE APPROXIMATE
CRANKSHAFT
DEGREES
Black- Smallest 16
Silver- Medium 12
Gold- Largest 8
C
▲
FIGURE 7
Advance Stop Bushing Chart
Changing the Advance Stop Bushing
Locking Out the Advance