Chevrolet, PN 7908, PN 79081*, PN 79082*, PN 79083
Ford, PN 7915 and PN 79153
ONLINE PRODUCT REGISTRATION: Register your MSD product online. Registering your product
will help if there is ever a warranty issue with your product and helps the MSD R&D team create
new products that you ask for! Go to www.msdperformance.com/registration.
Parts Included:
1 - Pro Mag Lt
1 - Billet Clamp
1 - Set Screw
1 - Lock Washer
1 - Flat Washer
1 - Nut
2 - O-rings (PN 7908 and PN 79083 only)
MSD Pro Mag 12 LT
DANGER
CAM ENGINE BLOCKS using a DRY SUMP OILING SYSTEM only. They will work
in engine blocks with 50mm, 55mm and 60mm cam tunnels. Installation of PN 79081 or PN 79082 in any
other application is not recommended and can result in engine damage.
If you have any questions or your engine does not fit this criteria please contact MSD Technical Support
at (915) 855-7123 for information and the correct part number for your application.
WARNING
*
MSD Pro Mag 12 LT PN 79081 and PN 79082 are designed to work in RAISED
CAUTION
1. Install the set screw into the intake manifold or engine
block.
2. Install the magneto into the engine. On Chevrolet
engines, position it so the hold down clamp
will align with the housing’s anti-rotation collar.
3. Install the billet clamp over the set screw and on to the
collar of the magneto. Put the flat washer, lock washer
and the nut onto the stud and tighten the assembly.
Note:
On Chevrolet applications, it is recommended to
locate the wiring harness of the generator towards
the left side injector stack (Figure 1). This also
puts the timing indicator of the magneto in a
position that should be easy to view. Also position
the band clamp’s retaining screw so it points to
the left and is in the back of the magneto, close
to the firewall. On Ford and Chrysler engines,
rotate the base until the pointer is easy to view.
4. Locate which cap terminal is going to be the
number one cylinder. Mark on the housing
this location then remove the cap (Figure 2).
NOTICE
Timing Indicator
Anti-Rotation
Collar
Figure 1 Positioning the Chevrolet Generator.
Cylinder 1
#1 Cylinder
Location
Figure 2 Marking the Number One Location.
MSD
• WWW.MSDPERFORMANCE.COM • (915) 857-5200 • FAX (915) 857-3344
2
INSTALLATION INSTRUCTIONS
5. Loosen the band clamp and position the
generator so the rotor tip is just leading into
the number one cylinder mark (from step 4)
indicating the number one cylinder (Figure
3). This will put the timing approximately 2°-3°
within TDC or where you have the timing set.
Note:
Always verify timing with a timing light.
Chevy/Chrysler
Ford
-
- Clockwise Rotation
Counterclockwise
Rotation
#1
Cylinder
Location
6. Install the cap and spark plug wires.
Figure 3 Positioning the Rotor Tip.
Recommendation:
It is recommended on Chevrolet
applications to put the number one cylinder in the
position shown in Figure 4. The custom wire sets MSD
offers are designed for this setup.
Figure 4 Recommended Chevrolet
Installation Position.
7.
Chevrolet PN 7908 and PN 79083 only:
Install
the gasket and apply a liberal amount of the
supplied lubricant to the distributor gear and
O-rings. (The supplied O-rings can
only
be
used if the block has been modified as shown
in Figure 5.)
Note: Block must be modified to use O-Rings.
Figure 5 Chevy Blocks must be modified to accept O-rings.
MSD
•
WWW.MSDPERFORMANCE.COM
• (915) 857-5200 • FAX (915) 857-3344
INSTALLATION INSTRUCTIONS
3
TIMING TAPE
There is a timing tape supplied with the Pro Mag. Once
the timing is set and verified, apply the tape to the
side of the generator aligning it with the pointer on the
magneto base (Figure 6). This is not meant for exact
timing changes, but will help for a guide when tuning.
Figure 6 Applying the Timing Tape.
WIRING
Figure 7 show the
wiring of the Pro Mag
system.
CYL
HEAD
PRO MAG 12
Figure 7 Wiring the Pro Mag 12 Lt.
Cap/Rotor
Gears:
Maintenance Parts
-
PN 7919 Red / PN 79193 Black
PN 8472 (.006" Oversized)
PN 8585
PN 8111
PN 8110
PN 8010
PN 8148
Chevrolet -
Ford
-
Kill Switch
-
Pro-Billet Clamps:
Chevrolet -
Ford
-
Band Clamp
-
MSD
•
WWW.MSDPERFORMANCE.COM
• (915) 857-5200 • FAX (915) 857-3344
TECH NOTES
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
Service
In case of malfunction, this MSD component will be repaired free of charge according to the terms of the warranty.
When returning MSD components for warranty service,
Proof of Purchase
must be supplied for verification. After
the warranty period has expired, repair service is based on a minimum and maximum fee.
All returns must have a Return Material Authorization (RMA) number
issued to them before
being returned. To obtain an RMA number please contact MSD Customer Service at 1 (888) MSD-7859 or visit
our website at www.msdperformance.com/rma to automatically obtain a number and shipping information.
When returning the unit for repair, leave all wires at the length in which you have them installed. Be sure to include
a detailed account of any problems experienced, and what components and accessories are installed on the vehicle.
The repaired unit will be returned as soon as possible using Ground shipping methods (ground shipping is covered
by warranty). For more information, call MSD at (915) 855-7123. MSD technicians are available from 7:00 a.m. to
5:00 p.m. Monday - Friday (mountain time).
when properly installed and purchased from an authorized MSD dealer, for a period of one year from the date of
the original purchase. This warranty is void for any products purchased through auction websites. If found to be
defective as mentioned above, it will be repaired or replaced at the option of MSD. Any item that is covered under
this warranty will be returned free of charge using Ground shipping methods.
This shall constitute the sole remedy of the purchaser and the sole liability of MSD. To the extent permitted by
law, the foregoing is exclusive and in lieu of all other warranties or representation whether expressed or implied,
including any implied warranty of merchantability or fitness. In no event shall MSD or its suppliers be liable for special
or consequential damages.
*Intended normal use means that this item is being used as was originally intended and for the original application
as sold by MSD. Any modifications to this item or if it is used on an application other than what MSD markets the
product, the warranty will be void. It is the sole responsibility of the customer to determine that this item will work for
the application they are intending. MSD will accept no liability for custom applications.
M
SD warrants this product to be free from defects in material and workmanship under its intended normal use*,
Limited Warranty
MSD
• WWW.MSDPERFORMANCE.COM • (915) 857-5200 • FAX (915) 857-3344
© 2014 MSD LLC
FRM28757
Revised 01/14
Printed in U.S.A.
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
