MSD 8992 Installation

MSD Timing Light

PN 8992

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Parts Included:

1 - MSD Timing Light 1 - Cable Harness

Note: Consult a service manual for your vehicle for information on vacuum connections and speciﬁc

timing procedures.

CONNECTING THE MSD TIMING LIGHT

1. Connect the inductive pickup to the timing light harness.

2. With the engine off, connect the Black clip to the negative (-) terminal on the battery. Connect the Red clip to the positive (+) terminal on the battery. The voltage should be between 10-16 volts (Figure 1).

3. Clamp the inductive pickup over the number 1 spark plug wire (See Figure 1). The position of the inductive pickup does not matter but the wire must ﬁt in the gap between the jaws of the pickup (Figure 2). Do not pinch the wire between the end of the jaws. Consult your vehicle's service manual to locate the number 1 cylinder on your engine.

TO NO.1 SPARK PLUG LOCATION ON VEHICLE (CONSULT VEHICLE MANUAL)

CABLE

HARNESS

RED

TIMING LIGHT

SPARK PLUG

SIDE

BLACK

Figure 1 Wiring.

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2 INSTALLATION INSTRUCTIONS

Note: The ferrite pole pieces in the inductive

pickup are fragile and may be damaged if the jaws are allowed to "snap" closed or if the pickup itself is dropped.

PLACE SPARK PLUG WIRE IN THIS GAP

NOTE: JAWS MUST CLOSE SO UPPER AND LOWER POLE PIECES TOUCH EACH OTHER.

4. With the engine stopped, clean any dirt from the timing marks. Figure 3 shows several typical timing marks and the rotation of the engine.

CHECKING THE ENGINE TIMING

Caution: When timing the engine, be very careful

not to let the Timing Light cables get tangled in the engine's cooling fan.

1. Start the engine and let it warm up to operating temperature. Note that the light ﬂashes when the power is connected. There is no trigger button.

2. Set the engine idle speed according to the service manual using a tachometer.

3. If the distributor has breaker points, set the dwell angle according to the service manual before checking engine timing. (When using an MSD Ignition, the dwell setting is not critical.)

4. With the engine idling at the recommended rpm, aim the Timing Light at the timing marks. The engine timing should be the same as recommended in the service manual. If not, see the next section on adjusting the timing.

SPARK PLUG

Figure 2 Inductive Pickup.

Figure 3 Typical Engine Timing Marks.

ADJUSTING THE ENGINE TIMING

STANDARD POINTS OR ELECTRONIC DISTRIBUTORS

1. Stop the engine. Loosen the distributor hold-down clamp until the distributor is just loose enough to turn the distributor by hand.

2. Restart the engine. Using the Timing Light, rotate the distributor until the timing marks line up. Stop the engine and securely tighten the distributor hold-down clamp.

3. Restart the engine and recheck the timing. If the timing needs further adjustment, repeat.

CRANK TRIGGER SYSTEMS

1. Stop the engine. Loosen the timing pickup and adjust it in the bracket, depending on whether you want to advance or retard the timing. Tighten the pickup.

Caution: Do not attempt to move the pickup while the engine is running. Personal injury or damage

to the timing pickup could result.

2. Restart the engine and recheck the timing. If the timing needs further adjustment, repeat step.

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