CDI 174-2075K 2 Installation And Troubleshooting Manual

This unit will replace the following P/N's ONLY: 398-832075A3, A4, 398-9873A15, A19, A22, and A28.
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 Stator is to be used as a replacement for the "RED" Mercury 16 Amp Stators. It is NOT a kit designed to replace the 398-5454,
398-8778, or 398-9710 series Stators.
Note: 174-2075K 2 requires a Voltage Regulator, DO NOT USE WITH A RECTIFIER ONLY.
Warning! Do not use this Stator with the 332-7778, 332-5772, 18495, or 19052 series Switch Boxes without the Adapter Module
because the voltage generated by the Ignition Charge coils of this Stator will destroy the Switch Boxes!
It is recommended that dielectric grease (i.e. CDI P/N: 991-9705) be used in the bullet nose connectors to help prevent corrosion.
Any sign of leakage out of the Ignition charge coils or bubbling around the battery charge windings indicate a bad Stator. Check for burned
marks on each pole. If a problem is found on the battery windings, we recommend the Voltage Regulator be closely checked. To replace
Stators with ring terminals, please use the bullet to ring adapters enclosed with this Stator.
1. Disconnect the Negative battery cable.
2. Disconnect the Stator wires from the CDM harness (or the Adapter Module for Switchbox applications), engine ground, and the Voltage
Regulator.
3. Remove the flywheel according to the service manual for your engine.
4. Mark the position of the mounting screws in relation to where the Stator wires come out of the old Stator.
5. Remove the old Stator.
6. Orient and install the new Stator (using a good thread-locker applied to the bolts) in the same position as the old Stator on the engine
and install the flywheel, following the service manual instructions.
7. Connect the new Stator Yellow wires to the Voltage Regulator ignoring any stripes on the Yellow wires of the Voltage Regulator as the
new Stator does not require the Yellow wires to be connected to a particular Voltage Regulator wire.
8. Connect the Green/White and White/Green Stator wires to the CDM harness (or the Adapter Module for Switchbox applications).
9. If installing this Stator on a 2 cylinder (30-40 HP) engine with CDM Ignition, you will need to use the provided barrel connector
depending on which connector you need. Remove the existing connector from the wire that will not connect to the TPM Module on your
engine. Solder or crimp the appropriate connector on the wire and connect the wire to the TPM Module.
10. Reinstall the flywheel according to the service manual for your engine.
11. Reconnect the Negative battery cable.
GENERAL TROUBLESHOOTING FOR CDM IGNITION SYSTEMS
HOW TO TEST THE ENGINE STOP CIRCUIT (KILL) FOR DC VOLTAGE:
1. DC voltage present on the kill circuit of the CDM Modules due to a faulty key switch, boat harness, or engine harness will severely
damage the CDM Module's internal kill circuit. Disconnect the CDM wiring harness at the CDM's on ALL OF THE CDM Modules at the
same time. Connect a Digital Multi Meter to the Black/Yellow Ignition Stop wires at the CDM's by way of the plug connectors of the
CDM Harness. Use the Black/Yellow wires in reference to a known good engine ground (Black wire in CDM plug connector). 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 ANY CDM Module at any point until the
problem is corrected OR DAMAGE TO THE CDM MODULE'S WILL OCCUR!
NO SPARK ON ANY CYLINDER:
Disconnect each Black/Yellow stop wire from each CDM module and disconnect the RPM Limiter's stop wire and retest. If the engine's
1.
Ignition now has spark, the stop circuit you just disconnected has a fault. Check the key switch, harness, RPM Limiter, and shift switch
(if present).
2. Disconnect the Yellow wires from the Voltage Regulator and retest. If the engine has spark, replace the Voltage Regulator.
3. Check the cranking RPM. A cranking speed of less than 250 RPM will 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.
4. Inspect the spark plug wires, boots, and spark plugs. Check for chafing on the wiring and harnesses.
5. Inspect and clean all engine and ignition ground connections.
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Rev F • 6/19/2023
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: 174-2075K 2
CDI Electronics, LLC • 353 James Record Road SW • Huntsville, AL 35824 USA
www.cdielectronics.com
INSTALLATION
• Tech Support: 1-866-423-4832 • Order Parts: 1-800-467-3371
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