PerTronix 9MR-LS1 User Manual

COMMON QUESTIONS AND ANSWERS

(The Lobe Sensor Ignitor II does not use a magnet sleeve)

Q. The engine will not start or runs rough. What is the problem?

A. Perform Power and Ground Checks. Check all connections to insure that they are

tight, and in the proper location. Check all grounds; if a distributor ground wire was

removed make sure that it was reattached properly. Make sure that the red Ignitor II

wire is supplied with a full 12 volts. The Ignitor II is designed to sense high current

levels, and shut off before damage occurs. Check all wires for shorts, correct polarity

and that the ignition coil’s primary resistance level is acceptable.

Q. . The vehicle will start, but then die. After waiting it will start again. What is wrong?

A. Perform Power and Ground Checks. The Ignitor II may have a “Low Voltage Problem.”

If the voltage supplied to the red Ignitor II wire is insufficient, the system may run for a

period of time, and then shut down as the voltage drops due to engine heat. The period

may vary from minutes to hours depending on available voltage and wiring condition. To

remedy this condition refer to steps 2-4 of the wiring instructions.

Q. How do I check for a “Low Voltage Problem” or determine if I am getting adequate

voltage?

A. Perform Power and Ground Checks. Also, to quickly test for a “Low Voltage Problem”

or for adequate voltage, remove the Ignitor II red wire from the coil positive terminal.

Attach a jumper wire from the battery positive terminal to the Ignitor II red wire. Try

to start the vehicle. If the vehicle star ts with this test refer to steps 2-4 of the wiring

instructions for further information.

Q. How do I check my coil for primary resistance?

A. Remove all wires from the coil. Set the ohmmeter to the lowest scale. Attach one

lead of the meter to the positive coil terminal. Attach the other lead to the negative coil

terminal.

Q. May I modify the length of the wires?

A. Yes, you may cut the wires to any length your application requires. You may also add

lengths of wire if needed (20-gauge). Make sure that all wire splices are clean and the

connections are tight.

Q. Will the Ignitor II work with aftermarket capacitive discharge boxes?

A. Yes, the Ignitor II is compatible with most CD boxes in the same respect as points.

Use the CD box wiring instructions for point systems and treat the Ignitor II black wire

as a point wire. The Ignitor II red wire should be attached to the 12-volt power source.

Q. Will the electronic shift assist in an OMC boat work with the Ignitor II?

A. The Ignitor II will work with all OMC stern-drive applications, when our “diode fix” is

used. If you’ve purchased a kit that didn’t include the “diode fix” diagram, call our tech

line.

Q. How can I receive additional help?

A. Check our web site for current trouble shooting tips and up to date technical

information. Log on to www.pertronix.com. You may also contact our tech line at

(909-547-9058)

LIMITED WARRANTY

Pertronix, Inc. Warrants to the original Purchaser of its solid-state ignition system
(product) that the Ignitor, magnet assembly and wiring (components) shall be free from defects
in material and workmanship for a period of (30) months from the date of purchase.

If within the period of the foregoing warranty Pertronix finds, after inspection, that
the product or any component thereof is defective, Pertronix will, at its option, repair such
products or component or replace them with identical or similar parts PROVIDED that within
such period Purchaser:

1. Promptly Notifies PerTronix, in writing, of such defects.

2. Delivers the defective products product or component to Pertronix (ATTN: Warranty)
with proof of purchase date; and

3. Has installed and used the product in a normal and Proper manner, consistent with
Pertronix printed instructions.

THE FORGOING LIMITED WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL
OTHER WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING AND IMPLIED
WARRANTY OR MERCHANTABILITY OR FITNESS FOR A PURPOSE.

THE FURNISHING OF A REPAIR OR REPLACEMENT COMPONENTS SHALL CONSTITUTE
THE SOLE REMEDY OF PURCHASER AND THE SOLE LIABILITY OF PerTronix WHETHER
ON WARRANTY, CONTRACT

BE LIABLE FOR MONEY DAMAGES WHETHER DIRECT OR CONSEQUENTIAL.

OR FOR NEGLIGENCE, AND IN NO EVENT WILL PerTronix

440 E. Arrow Highway, San Dimas, CA. 91773

909-599-5955 www.pertronix.com

12-VOLT NEGATIVE GROUND INSTRUCTIONS

FOR PART NUMBER: 9MR-LS1

GENERAL INFORMATION

1. IMPORTANT: Read all instructions before star ting installation.

2. DO NOT USE WITH SOLID CORE SPARK PLUG WIRES.

3. The Lobe sensor Ignitor II is designed specifically for the application and distributor
numbers that are listed in the application guide. Any modification to this component
will void the warranty.

4. The Lobe Sensor Ignitor II does not require a magnet sleeve to trigger the module.

5.

The Ignitor II ignition can be used in conjunction with most ignition coils rated at

0.45 ohms or greater.

6. All external resistors must be removed to achieve optimum performance from the
Ignitor II ignition system.

7. The Ignitor II is compatible as a trigger for most electronic boxes.

8. See our website (www.pertronix.com) for the latest product information.

IGNITOR INSTALLATION

4 cylinder distributors only

( see next page for 6 cylinder applications)

1 Remove distributor cap and rotor from distributor. Do not disconnect the spark plug

wires from the cap. Examine parts for excessive wear. Replace as needed.
2 Remove the point wire from the negative coil terminal.
3 Remove and retain the point and condenser. Installing the Ignitor does not alter

the internal configuration of your distributor. Therefore, the point, condenser and

hardware can be used as backup.
4 Clean all dirt and excess oil from the breaker plate and point cam.
5 Secure Ignitor to adapter plate with provided screws before installing onto distributor

(See Figure 4 & 5).

• NOTE: IGNITOR AND ADAPTER PLATE MUST BE INSTALLED IN THE PROPER
LOCATION AS SHOWN IN FIGURE 4 & 5.

• Small Distributor Cam (0.715”): Ignitor and Adapter Plate installation (See figure 4).

• Large Distributor Cam (1.00”): Ignitor and Adapter Plate installation (See figure 5).

6 Secure adapter plate with provided screws
7 Note: A wire tie is included to keep Ignitor wires from rubbing against any moving

parts.

8 Insert both wires through the wire tie and wire access hole in the side of the

distributor housing.

9 Pull the rubber grommet into place. Check to insure that the wires do not contact

any moving parts.

10 Replace distributor cap and rotor. Make sure all spark plug wires are securely at-

tached. DO NOT USE WITH SOLID CORE SPARK PLUG WIRES.

11 See Wiring Instructions.

IGNITOR

FIGURE 4

(Small Cam 0.715”)

(Measured from point to point)

IGNITOR

FIGURE 5

(Large Cam 1.00”)

(Measured from point to point)

6 Cylinder Distributors Only

(S112AX & BX DISTRIBUTORS ONLY)

1 Remove distributor cap and rotor from distributor. Do not disconnect the spark plug

wires from the cap. Examine parts for excessive wear. Replace as needed.
2 Remove the point wire from the negative coil terminal.
3 Remove and retain the point and condenser. Installing the Ignitor does not alter

the internal configuration of your distributor. Therefore, the point, condenser and

hardware can be used as backup.
4 Clean all dirt and excess oil from the breaker plate and point cam.
5 6 cylinder distributors only (S112AX & BX):

• The adapter plate needs to be installed with the part number on the adapter plate
facing down.

• Use figure 6 to mount Ignitor to adapter plate.

• Use figure 6 to install adapter plate on to distributor.

IGNITOR

FIGURE 6

6 Secure adapter plate with provided screws
7 Note: A wire tie is included to keep Ignitor wires from rubbing against any moving

parts.

8 Insert both wires through the wire tie and wire access hole in the side of the

distributor housing.

9 Pull the rubber grommet into place. Check to insure that the wires do not contact

any moving parts.

10 Replace distributor cap and rotor. Make sure all spark plug wires are securely at-

tached.

Warning!

DO NOT USE WITH SOLID CORE SPARK PLUG WIRES.

WIRING INSTRUCTIONS

1. The Ignitor II ignition can be used in conjunction with most ignition coils rated

at 0.45 ohms or greater. For optimum performance purchase and install the

Flamethrower II high performance coil.

2. Attach the black Ignitor II wire to the negative coil terminal. Attach the red Ignitor II

wire to the positive coil terminal. (See Figure 3)

A. Recommended Installation: Many vehicles came equipped with ballast resistor or

resistance wire. To achieve optimum performance from the Ignitor II ignition system, we

recommend removal of these components.

• To remove a ballast resistor, (normally white ceramic blocks 3 to 4 inches long), dis-

connect all wires on both ends of the ballast resistor. Remove the resistor from the

vehicle and splice the disconnected wires together at a single point.

• To remove a resistance wire, trace the coil power wire, which was previously con-

nected to the positive coil terminal, back to the fuse block. Bypass this wire with a

12-gauge copper stranded wire.

B. Alternative Installation: The Ignitor II can also be installed in applications retaining

the ballast resistor or resistance wire.

• Attach the Ignitor II black wire to the negative coil terminal. Attach the Ignitor II red

wire to the ignition side of resistance, or any 12 volt ignition power source.

3. Check to insure that the

polarity is correct, and that

all connections are tight.

4. Re-connect the battery.

5. Perform the Power and

Ground tests. Refer to the

Power and Ground test

procedure.

6. Start the engine and allow

it to reach normal operating

temperature. Check ignition

timing, and adjust to the

desired setting.

+

FIGURE 3

(WITHOUT EXTERNAL RESISTOR)

To Ignition

-

POWER & GROUND TESTS

It is imperative that the power and grounds be checked as part of the installation
procedure. After installing the kit within the distributor and with the distributor in
the engine, using a digital multi-meter measure the resistance from the aluminum
plate holding the module to battery (-). The net resistance must be less than 0.2
ohms. Set meter to lowest ohms setting. The net resistance is the meter reading
minus the resistance of the meter leads. If the net resistance is greater than 0.2
ohms the source of the faulty ground must be found and fixed. Usually the source
of the bad ground is easily found by holding one probe on an original location and
moving the second probe toward the static probe. Where the resistance drops
identifies the source.

Maximum resistance from Ignitor plate to battery negative terminal. 0.2 ohms

EXAMPLE:

Resistance from Ignitor plate to battery negative (-) terminal. 0.4 ohms

Resistance of meter leads 0.2 ohms

After subtracting meter lead resistance, your total resistance is: 0.2 ohms

VOLTAGE TEST

1. Do not disconnect wires from Ignition coil and place ignition switch in the “off”
position.

2. Connect jumper wire from negative (-) terminal of the coil to a “good” engine
ground.

3.Connect voltmeter red lead to the positive (+) terminal of the coil and the black lead
to a “good” engine ground.

4.Turn “ON” the ignition switch and note voltage reading on the voltmeter. Quickly
read the voltage and turn ignition “OFF”. Leaving ignition “ON” for an extended
period could result in permanent damage to the Ignitor.

5. SEE CHART BELOW FOR SPECIFICATIONS.

Note: Low voltage can be caused by poor connections, poor contacts in the
ignition switch, ballast resistor, and or a resistance wire in the wiring harness
(Factory Installed).

Minimum Maximum

Ignition Switch “ON” 8.0V N/A

Cranking 8.0V N/A

Engine Running N/A 16.0V