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ENGINE WILL NOT STOP (KILL):
1.
Check the kill circuit in the Switchbox by using a jumper wire connected to the Black/Yellow wire coming out of the Switchbox and
shorting it to ground. If this kills the engine, the kill circuit in the harness or on the boat is bad, possibly the ignition switch. If this does
not stop the Switchbox from sparking, replace the Switchbox.
HIGH SPEED MISS:
1.
Check the DVA of the Stator while running the engine. It should show a smooth climb on the Green/White and Green/White Stator
wires. If there is a sudden or fast drop in voltage right before the miss becomes apparent, the Stator is usually at fault.
2.
Perform a high-speed shutdown and read the spark plugs. Check for water. A crack in the block can cause a miss at high speed when
the water pressure gets high, but a normal shutdown will mask the problem because the water will evaporate off the spark plug before
you can identify it.
BOTH CYLINDERS HAVE SPARK BUT THE ENGINE WILL NOT RUN:
1.
Check the flywheel shear key.
2.
Index the flywheel and check timing on both cylinders. If the timing is off, check the Trigger and flywheel center hub Trigger magnet.
WILL NOT ACCELERATE BEYOND 3000-4000 RPM:
1.
Connect a DVA meter between the Stator's Green/White and White/Green wires. Run the engine up to the RPM where the problem is
occurring. The DVA should show a smooth climb in voltage and remain high through the RPM range. A sharp drop in DVA right before
the problem occurs usually indicates a bad Stator.
2.
Connect an inductive tachometer to each cylinder in turn and try to isolate the problem. A single cylinder dropping spark will likely be a
bad Switchbox or Ignition coil. All cylinders not sparking properly usually indicates a bad Stator.
3.
Check the flywheel magnets for cracked, broken, or loose magnets.
MISS AT ANY RPM:
1.
In the water or on a Dynamometer, check the DVA on the Green and Green/Yellow Primary wires from the Switchbox while connected
to the Ignition coils. You should have a reading of at least 150 DVA or more, increasing with engine RPM until it reaches 300-400 DVA
maximum. A sharp drop in DVA right before the miss becomes apparent on all cylinders will normally be caused by a bad Stator. A
sharp drop in DVA on less than all cylinders will normally be the Switchbox or Trigger.
2.
Connect an inductive tachometer to each cylinder in turn and try to isolate the problem. A high variance in RPM on one cylinder usually
indicates a problem in the Switchbox or Ignition coil. Occasionally a Trigger will cause this same problem. Check the Trigger DVA (see
NO SPARK ON EITHER CYLINDER).
3.
Check the flywheel magnets for cracked, broken, or loose magnets.
SWITCHBOX REPEATEDLY BLOWS ON SAME CYLINDER:
1.
Check the Trigger wires for shorts to engine ground as a shorted Trigger wire can destroy a SCR inside the Switchbox.
2.
Replace the Ignition coil on the cylinder dropping spark.
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Rev C • 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 Electronics, LLC • 353 James Record Road SW • Huntsville, AL 35824 USA
www.cdielectronics.com
• Tech Support: 1-866-423-4832 • Order Parts: 1-800-467-3371
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