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 Electronics • 353 James Record Road SW • Huntsville, AL 35824
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Rev D • 6/19/2023 Page - 1 of 5 QF-358
CDI P/N: 173-3672
This unit replaces P/N's: 581830, 581865, 581987, 582016, 582023, 582404, 582497, 582867, 583023, 583671, and 583672
Warning! This product is designed to be installed 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.
INSTALLATION
1. Remove the Negative battery cable.
2. Remove the flywheel according to the service manual for your engine.
3. Disconnect the original Stator wires.
4. Remove the original Stator, saving the original bolts.
5. Install the new Stator using the original bolts with a good thread-locker applied to the bolts and tightened to the factory torque
specifications.
6. Connect the new Stator to the Power Pack.
7. Connect the new Stator to the Regulator/Rectifier (ignore any stripes on the Regulator/Rectifier as the new Stator does not require the
Yellow wires to be connected to a particular Regulator/Rectifier wire).
8. Replace the flywheel according to the service manual for your engine.
9. Replace the Negative battery cable.
4 CYLINDER TROUBLESHOOTING
NO SPARK ON ANY CYLINDER:
1. 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.
2. Perform a visual inspection of all ground wire connections to make sure that they are clean and tight.
3. Disconnect the Black/Yellow stop wire from the Power Packs and retest. If the engine's ignition has spark, the stop circuit has a fault.
Check the key switch, harness, and shift switch (if present).
4. Disconnect the Yellow wires from the Rectifier and retest. If the engine now sparks, replace the Rectifier.
5. Check Stator and Timer Base resistance and DVA as shown:
Read from Read to OEM Ohms CDI Ohms DVA (Connected) DVA (Disconnected)
Brown (Stator) Brown/Yellow (Stator) 485-635 Ω 450-600 Ω 150-400 V 150-400 V
White (Common) Blue (#2 Timer Base) 30-50 Ω 27-36 Ω 0.6 V Minimum 0.6 V Minimum
White (Common) Green (#4 Timer Base) 30-50 Ω 27-36 Ω 0.6 V Minimum 0.6 V Minimum
White/Black (Common) Blue/White (#1 Timer Base) 30-50 Ω 27-36 Ω 0.6 V Minimum 0.6 V Minimum
White/Black (Common Green/White (#3 Timer Base) 30-50 Ω 27-36 Ω 0.6 V Minimum 0.6 V Minimum
6. Rare causes include a weak or broken flywheel Charge coil or Timer Base magnets. If possible, try another flywheel.
NO SPARK ON ONE BANK:
1. Disconnect the Black/Yellow stop wire from the Power Packs and retest. If the engine's ignition has spark, the stop circuit has a fault.
Check the key switch, harness, and shift switch (if present).
2. Check the Stator and Timer Base DVA (see NO SPARK ON ANY CYLINDER).
3. Swap the Stator wire pairs from one side of the engine to the other side and see if the problem moves. If it does, either the Stator is
faulty or there is a poor connection between the Stator and the Power Pack.
4. Check the DVA on the Orange Primary wires from the Power Pack to the Ignition coils while connected to the Ignition coils. You should
have a reading of at least 150 V or more. If the reading is low on one cylinder, disconnect the Orange Primary wire from the Ignition coil
for that cylinder and reconnect it to a Pack Load resistor. Retest. If the reading is now good, the Ignition coil is likely bad. A continued
low reading usually indicates a bad Power Pack.
5. Visually inspect the Ignition coils for burned or discolored areas or cracks in the casing (indicating arcing inside the Ignition coil).
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