SPECiAL TOOLS

figure i 2-Checking Breaker Point r ension

Figure 13-Aligning and Adjusting Breaker Points

CORRECT AI.IGNMENT MISAI.IGNMENT OF CENTERS MISALIGNMENT Of POINT FACES un

figure 14-Breaker Point Alignment

E. Installation

1. If the crankshaft has not been rotated while the distributor was removed, install the distributor with the rotor aligned with the mark previously scribed on the breaker dust cover with the primary terminal in its approximate previous posi. tion.

If ignition timing is required, rotate the crankshaft until No.1 piston is on TD.C. after the compression stroke, then position the distributor in the cylinder block with the rotor at the No. 1 firing position and the breaker points open, and instaI1 the hold down clamps. IMPORTANT: itlake sure the oil pump intermediate drive shaft i .• properly seated in the distributor. It may be necessary to crank the engine the slarter after the distributor drive gear is partially engaged. in order to engage the intermediate shaft fully in the distributor.

2. Install the retaining screws and lockwashers but do not tighten the screws at this time. Connect the distributor primary wire.

3. Rotate the distributor base clockwise until the breaker points are just starting to open. Tighten the screws. Install the rotor and distributor cap.

Start the engine, and check the ignition timing and centrifugal advance with a timing light.

F. Setting Basic Ignition Timing

1. Place the gear shift lever in neutral position and tum the ignition switch off before attempting to set ignition timing.

2. Remove the distributor cap from the distributor and the spark plug from the number one cylinder.

3. Hold your thumb over the spark plug hole as the engine is cranked. Observe the distributor rotor closely while it rotates, then mark its exact location on the breaker dust cover the moment compression blows by your finger.

4. Press the starter button again until the rotor is almost in alignment with the rotor location mark placed on the dust cover and compression is felt at the number one spark plug hole. Stop the rotor in this position.

5. Remove the timing hole cover on the flywheel housing. Observe the location of 4'" before top dead center for all models, Figure 15. If the mark does not align with the pointer, insert a screw driver in the timing hole and rotate the flywheel until the correct mark on the flywheel does align with the timing pointer on the housing.

6. When the 4" mark aligns with the pointer, the number one piston is before top dead center position on the compression stroke ready to fire.

In this position, the ignition contact points should just begin to separate and the rotor must point to the number one spark plug wire. This is the basic ignition timing setting for idle speed (450475) rpm.

7. If ignition points must be moved to obtain their separation point, loosen the damp screws on the distributor base and turn the distributor manually. To advance ignition timing, turn the distributor base counterclockwise. To retard ignition timing, turn the distributor base clockwise.

NOTE: In the event that the (listril)utor base must be turned more than 10 or 12 degrees, lift the distributor vertically until the distributor rotor can lie turned to the number one spark plug wire location. It will be necessary to reposition tlte oil pump shaft to properly align the hex drive. Install the distriEHL/or clamp retainers and tighten securely.

G. Ignition Timing witb Timing Ligllt

1. Remove the No.1 spark plug wire from the distributor cap. Plug a timing light adapter into the distributor cap and into the wire. Connect the secondary (high tension) lead of the timing light to the adapter.

2. Connect the primary positive lead (RED) of light to a ground. Connect the primary negative lead (BLACK) to the hattery terminal of the ignition coil

3. Remove the timing cover plate. Direct the light onto the flywheel. Timing should be 4 0 before top dead center at idle speed (450-475 rpm) for all models.

4. Start the engine and run it at idle speed (450475 rpm).

5. If the timing at 450-475 rpm does not concur with Figure 15, loosen the distributor mounting screws and turn distributor counterclockwise to advance the timing or clockwise to retard the timing. Be sure to tighten the mounting cap screws securely, after adjustment. Recheck the timing after the distributor is tightened secureJy.

H. Checking Distributor Centrifugal Advance

Correct basic engine timing does not indicate that the engine spark timing is correct throughout the various speed ranges. After the engine speed reaches 500 revolutions per minute, spark advance is controlled. by the centrifugal advance mechanism built in the base of the distributor. The use of a timing light, directed on the flywheel degree markings, is necessary to determine whether the centrifugal advance range (above 500 rpm) shown in the following chart is correct.

ALL

450-475 RPM 1200 RPM Crankshaft Crankshaft Degrees Degrees B.T.D.C. RT.D.C.

No Load 2200 RPM Crankshaft Degrees B.T.D.C.

Rated Speed

With Four Speed Transmission, 2000 RPM With Five or Ten Speed Transmission, 2200 RPM

Figure 15- Flywheel Timing Marks