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Exciter/cd for 9.8 2-strike

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fjay61

New member
I have a 2003 Nissan 9.8 2s with no spark. The cd is the one piece unit with integrated coil. The system is simple in that there are only the two components, the exciter and the cd. Since I don't have sophisticated test equipment, I can only make simple resistance checks with test meter. The exciter is simply a coil. It has a resistance of about 270 ohms. The cd is open - infinite resistance. Before I spend the $200+ for the cd, I need to have more assurance that it is bad. Suggestions?
THANKS!!!!
fjay61
 
Cd= compacitor discharge?? No stator ??? Need voltage to run coil?? Trigger to tell when to fire switch box to switch coil on off not that firmiliar with this exact engine but basic ignition principal
Coils can be tested with ac volt test as well as resistance
 
Oh ya sorry didn't ask make sure the kill circuit is not off or shorted disconnect then check for spark suck to suggest but got to make sure simple first
 
fjay,

I am assuming you have an NS9.8B. The factory way to test the ignition components is indeed by conventional, analog ohm meter. Emphasis analog. With 3v or under battery. Testing the combined cd/coil (igniter) involves testing the input side to ground and the spark plug side to ground, as well as checking for leakage between the input and plug sides. Actual tolerances are in the Factory service manual (available from any dealer, including me), but suffice to say that you should have maybe a few or a hundred + ohms to ground on the input, and many k-ohms (may read infinite, depending on your meter) on the output. Verify the brown kill wire is not grounded.

If you need a new cd box, order 3B2061700M C.D. IGNITION UNIT (F8T11073/7Y27) $273.19, from any dealer, including me.
 
pvanv said:
fjay,

I am assuming you have an NS9.8B. The factory way to test the ignition components is indeed by conventional, analog ohm meter. Emphasis analog. With 3v or under battery. Testing the combined cd/coil (igniter) involves testing the input side to ground and the spark plug side to ground, as well as checking for leakage between the input and plug sides. Actual tolerances are in the Factory service manual (available from any dealer, including me), but suffice to say that you should have maybe a few or a hundred + ohms to ground on the input, and many k-ohms (may read infinite, depending on your meter) on the output. Verify the brown kill wire is not grounded.

If you need a new cd box, order 3B2061700M C.D. IGNITION UNIT (F8T11073/7Y27) $273.19, from any dealer, including me.
Click to expand...

Thanks, Guys!* Yes, it is a NS9.8B. The brown kill is not grounded (1st thing checked). The two wires (black and green) from the exciter are not connected to any engine circuitry and show ~270 ohms DC resistance. Apparently the exciter coil is not open and unless the resistance is too high for some unknown reason, it should be OK.* The cd unit is off the engine. It just has 3 leads in - black, green, and brown (kill) and the 2 spark plug leads out.* That's it. Lacking any other test procedure, I measured the resistance between the black and green cd input wires - it shows infinite (open) even with a very sensitive Fluke digital multimeter. Given these results, I can't think of any other problem except a bad cd. But all suggestions are greatly appreciated before I split with lots of money for a new cd!
Fjay61
 
You are probably correct. But... the meter must 1- be analog, and must 2- use a dc source of 3v or less. Otherwise, you 1- don't deliver enough drive to the ckt under test, and 2- blow up the internals in the cd. What is the impedance from a plug lead to ground? What is the impedance between a plug wire and the input wire? What is the reading between the brown kill wire and ground?
 
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