CDI 114-4952A30 Installation And Troubleshooting Manual

This unit replaces the 18495A 9, A14, A16, A17, A20, A21, and A30 Switchboxes.
Warning! This product is designed for installation by a professional marine mechanic. CDI Electronics cannot be held liable for
injury or damage resulting from improper installation, abuse, neglect, or misuse of this product.
This engine has a locked Trigger arm. The timing is controlled by the Switchbox and varies according to the engine RPM. RPM limiting is
done by retarding the timing at high RPM. Timing adjustment must be done when installing either a Switchbox or a Trigger.
PLEASE USE THE OEM RECOMMENDED SPARKPLUG NGK BPZ8H-N-10.

How to test the Engine Stop Circuit (Kill) for DC Voltage:

1. DC voltage present on the kill circuit of the Switchbox due to a faulty key switch, boat harness, or engine harness will severely damage
the Switchbox's internal kill circuit. Connect a Digital Multi Meter to the Ignition Stop wire(s) AT THE SWITCHBOX(S) while
disconnected from the Switchbox in reference to a known good engine ground. Turn the Ignition switch on and off several times. If, at
any time, you see over 2 VDC on the kill wire(s), there is a problem with one or both harnesses and/or the Ignition switch. The Ignition
Stop wire should not be connected back to the new Switchbox at any point until the problem is corrected OR DAMAGE TO THE
SWITCHBOX WILL OCCUR!
1. Disconnect the Negative battery cable (if equipped).
2. Disconnect all wires connected to the old Switchbox along with the Green Primary wires connected to the Ignition coils.
3. Unbolt and remove the old Switchbox.
4. Bolt the new Switchbox on, using the original bolts.
5. Connect the Brown/Yellow and Brown/White wires to the Trigger by matching the wire colors.
6. Connect the 3 pin connector to the Stator connector.
7. Connect the Green/Yellow Primary wire to the #1 Ignition coil.
8. Connect the Green/White Primary wire to the #2 Ignition coil.
9. Connect the Black ground wire to a clean engine ground and verify continuity using a multi meter.
10. Connect the Black/Yellow kill wire to the Black/Yellow kill wire from the engine or stop button harness.
11. Reconnect the Negative battery cable (if equipped).
12. Verify engine timing using the service manual for your engine before putting the engine back into normal operation.

NO SPARK ON EITHER CYLINDER:

1. Disconnect the Black/Yellow stop wire AT THE SWITCHBOX and retest. If the engine now has spark, the stop circuit has a fault. Check
the key switch and harness (if equipped).
2. Check the cranking RPM. A cranking speed of less than 250 RPM may not allow the system to spark properly. This can be caused by a
weak battery, dragging starter, bad battery cables, or a mechanical problem inside the engine.
3. Inspect and clean all engine and ignition ground connections. Make sure the Switchbox and Ignition coils are grounded.
4. Verify the Flywheel only has 2 outer magnets not 4 magnets. The newer ignition system has a 4 magnet Flywheel and uses a 114-5713
Switchbox and Stator with the White/Green & Green/White wires.
5. Check the Stator and Trigger as follows:
Read from
Blue (Low speed Stator)
Red (High speed Stator)
Brown/Yellow (#1 Trigger)
Brown/Yellow (#1 Trigger)
Brown/White (#2 Trigger)
6. Check the DVA on the Black/Yellow kill wire coming out of the Switchbox. You should have a reading of at least 150 DVA or more. The
Stator and Trigger should be connected to the Switchbox for this test. If you do not, check the DVA on the Stator and the Trigger. If the
DVA on the Stator and Trigger but the DVA on the Black/Yellow Kill wire coming out of the Switchbox is low, the Switchbox is likely
faulty.
Web Support:
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Rev E • 5/18/2023
Installation and Troubleshooting Guide
This installation is to be completed by an Authorized Dealer or Professional Service
Technician. For questions regarding installation or warranty, call CDI Tech Support
at 866-423-4832. Do not return to the Dealer or Distributor where the part was purchased.
Contact CDI Electronics Directly for Return Material Authorization.
CDI P/N: 114-4952A30

TROUBLESHOOTING

Read to
Black (Stator ground)
Black (Stator ground)
Brown/White (#2 Trigger)
Engine Ground
Engine Ground
CDI Electronics, LLC • 353 James Record Road SW • Huntsville, AL 35824 USA
www.cdielectronics.com

INSTALLATION

OEM Ohms CDI Ohms
2900-3500 Ω 1900-2400 Ω
100-180 Ω 200-250 Ω
650-850 Ω
Open Open
Open Open
• Tech Support: 1-866-423-4832 • Order Parts: 1-800-467-3371
Page - 1 of 3
DVA Connected
180 V Minimum
25 V Minimum
- 4 V Minimum
1 V Minimum
1 V Minimum
Disconnected
180 V Minimum
25 V Minimum
4 V Minimum
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QF-358