PN4224 datasheet(8/24 Pages) MALLORY

8 / 24 page

INSTALLATIONINSTRUCTIONS

MSD POWERSPORTS • WWW.MSDPOWERSPORTS.COM • (915) 858-3365 • FAX (915) 858-3496

Tachometer Compatibility List

AFTERMARKETTACHOMETER

WHITEWIRETRIGGER

AUTOGAGE

REQUIRED

AUTOMETER

NOTACHADAPTREQUIRED

MALLORY

NOTACHADAPTREQUIRED

MOROSO

NOTACHADAPTREQUIRED

STEWART

REQUIRED

S.W.&BITORX

REQUIRED

SUN

REQUIRED

VDO

REQUIRED

Figure 6 PN 43751

Tester.

LED

The LED on the side of the MC-4 monitors several operating conditions of the MC-4. If the LED indicates that there

is a problem with the ignition system, follow the steps through the Troubleshooting section. The LED will appear to

be on steady at above idle speeds when everything is functioning properly.

• A Code 2 (flash flash) will flash if there is a problem with the Cam Sync Signal.

• ACode3(flashflashflash)willflashifthesupplyvoltagedropsbelow12volts,whenoperatingbelow3300rpm.

• The LED will flash for every trigger signal from the crank trigger. You can take advantage of this when statically

setting the timing of the engine.

TACH/FUEL ADAPTERS

If your tachometer does not operate correctly you probably need a Tach Adapter. The chart in Figure 5 lists common

tachometers and if an Adapter is necessary.

Figure 5 Common Tachometers and Adapters.

MISSES AND INTERMITTENT PROBLEMS

Experience at the races has shown that if your engine is experiencing a miss or hesitation at higher rpm, it is usually

not directly ignition. Most probable causes include faulty wiring, a coil or plug wire failure, arcing from the boot plug

to ground. Several items to inspect are:

WARNING: Do not touch the coil terminals during cranking or while the engine is running.

• Alwaysinspecttheplugwiresattheplugforatightconnectionandvisuallyinspectforcuts,abrasionsorburns.

Dielectric grease such as Spark Guard, PN 8804, is also recommended.

• InspectthePrimaryCoilWireconnections.Caution:TheremaybehighvoltageattheCoilPositive(+)terminal

even with the key turned On. During cranking or while the engine is running, very high voltage will be present

and no test equipment should be connected.

• Make sure that the battery is fully charged and the connections are clean and tight. If you are not running an

alternator this is an imperative check. If the battery voltage falls below 11 volts during a race, the MC-4 current

draw will increase.

• Is the engine running lean? Inspect the spark plugs and complete fuel system.

• Inspect all wiring connections for corrosion or damage. Remember to always use proper connections followed

by soldering and seal the connections completely.

• If you are using the Yellow Shift Kill Wire with a Shift Solenoid, you may be getting a double kill when shifting.

Attach the supplied Diode to the solenoid as shown in Figure 9.

If everything checks positive, use the following procedure to test the ignition for spark.

MSD also offers an Ignition Tester (Figure 6), PN 43751. This tool allows you to check

your complete ignition system while it is on the bike as well as the operation of rpm limits,

activated switches and shift lights and the Cam Sync Signal.

PN4224 Datasheet(PDF) 8 Page - Mallory performance club

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