Mallory Ignition SPRINTMAG, SPRINTMAG II User Manual

MAGNETO IGNITION SYSTEMS

SUPER-MAG

®

II SPRINTMAG

®

SUPER-MAG®III SPRINTMAG®II
SUPER-MAG

®

IV SPRINTMAG®III

INSTALLATION PROCEDURE FOR SINGLE AND DUAL IGNITION SYSTEMS

Step 1

Rotate the engine to top dead center (TDC), #1 cylinder on
compression stroke. Remove the magneto cap. Position the
magneto in the engine with the rotor pointed toward the
desired #1 plug wire position. CAUTION: BE SURE THE
MAGNETO IS FULLY SEATED. Set the distributor hold
down clamp in place but do not tighten at this time.

SPRINTMAG®, SPRINTMAG®II and SPRINTMAG®III:

Be sure the magneto pointer aligns with (zero) on the timing
plate on the generator. Also, be sure the band clamp is tight.

SUPER-MAG

®

II, III, AND IV, LEFT-HAND ROTATION:

Be sure the magneto pointer aligns with the left side edge
of the timing plate on the generator. Also, be sure the band
clamp is tight.

SUPER-MAG

®

II, III, AND IV, RIGHT-HAND ROTATION:

Be sure the magneto pointer aligns with the right-side edge
of the timing plate on the generator. Also, be sure the band
clamp is tight.

Step 2

Static Timing (TDC Method)

Connect the static timer (buzz box) to the generator (see
Figures 1 and 2). Turn static timer ON. If the buzzer begins
sounding, turn the magneto in either direction until the
buzzer is silent.

LEFT-HAND ROTATION: While the buzzer is silent, hold the
rotor clockwise and slowly turn the magneto counterclockwise.
Stop turning the magneto when the buzzer begins sounding.
Tighten the distributor hold-down clamp.

RIGHT-HAND ROTATION: While the buzzer is silent, hold
the rotor counterclockwise and slowly turn the magneto
clockwise. Stop turning the magneto when the buzzer
begins sounding. Tighten the distributor hold-down clamp.

FORM 1018M (REV A) 10/09

Step 3

Make a mark on the generator below the rotor. Install the
magneto cap. The post on the magneto cap over the mark
made on the generator is # 1 cylinder. Install the spark plug
wires in the sequence of the firing order.

Step 4

SET TIMING. Loosen the band clamp.

SPRINTMAG®AND SPRINTMAG®II: Turn the generator
to align the pointer and timing plate to the desired initial
timing. Tighten the band clamp.

SPRINTMAG

®

III: Rotate crank hub to align with timing

mark and pointer. Use static timing method to set timing.
Recheck timing with timing light above 3500 RPM. By
leaving the pointer on "0", the timing may be reset without
the use of a timing light. To reset timing, loosen the band
clamp and rotate the generator housing.

SUPER-MAG®II, III, IV: Turn the generator to align the
pointer and timing plate to the desired initial timing. Each
mark on the timing plate is 2 degrees. Tighten the band clamp.

NOTE: Timing may be checked with most timing lights
after installation is completed.

Step 5

WIRING PROCEDURE

Connect long harness to the generator. Refer to WIRING
DIAGRAMS on pages 2 and 3 for all additional wiring.

INSTALLATION INSTRUCTIONS

1MALLORY IGNITION www.malloryracing.com

GENERAL INFORMATION

• Closely monitor spark plugs and spark plug gaps for
maximum performance. Set spark plug gaps at .018" to
.022".

• 16AWG/600V or larger wire must be used on all additional
wiring. All grounds must be made to the engine block. Do
not ground to chassis or anodized surfaces.

WARNING

• A KILL SWITCH MUST BE USED TO STOP THE ENGINE
FROM RUNNING.

• NEVER CONNECT ANY PART OF THIS IGNITION TO 12
VOLTS.

• Disconnect and remove generator before arc welding
on the vehicle.

• On dual ignition systems, each ignition system must run
independent of the other.

• To prevent internal damage to transformers, the
transformer must be mounted with the high tension lead
coming from the bottom and positioned no closer than

2.5" from the nearest metal surface.

SPRINTMAG AND SPRINTMAG II MAGNETO STARTING TIP

A magneto normally requires good crankshaft speed to
produce enough ignition output to start the engine. When the
magneto is hot, higher crankshaft speeds are required. The
Mallory Magneto Start Assist Box is designed to electronically
connect the magneto system to the engine's starter solenoid.
During starting, the Magneto Start Assist Box "boosts" the
magneto output, creating a strong starting spark even at very
low cranking RPM. IMPORTANT: The magneto must be
modified at the factory before it can be used with the
Magneto Start Assist Box. Ship your magneto to:

Prestolite Performance
10601 Memphis Ave. #12
Cleveland, OH 44144

FIGURE 1

2 www.malloryracing.com MALLORY IGNITION

SPRINTMAG®III MAGNETO

ORANGE

WEATHERPACK CONNECTORS

HARNESS
PN 28862

SET STATIC TIMING
(BUZZ) FROM HERE

HARNESS
PN 28998

TO ENGINE

GROUND

RED

TO ENGINE GROUND

KILL SWITCH PN. 26074
NOTE: ON A DUAL MAG ENGINE, A KILL SWITCH IS REQUIRED FOR
EACH MAG. DO NOT USE ONE KILL SWITCH TO CONTROL BOTH MAGS.

YELLOW