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suzuki dt5

J

Jag809

New member
Good day,

My Suzuki DT5 no longer sparks. Measuring the ignition coil (273 ohms) and the (sensor) coil (22 ohms) yielded resistance. I couldn't find the exact value anywhere, but I didn't find it particularly unreasonable. https://www.suzuki-marineparts.com/en/model/suzuki/dt5-0501-542055/1985/drawing/magneto-011

When testing the CDI, I got a bit stuck. I measured no resistance from spark plug terminal to spark plug terminal, nor from spark plug terminal to ground.
So I expected the CDI to be faulty. After ordering a new one, I expected at least a spark, but unfortunately, to my great regret, no spark.

However, when measuring from spark plug to spark plug, I did get 4.75 kOhm.

Does anyone know how I can measure/test/plan the CDI so I can get a spark at the plug?

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Check selffixer.com, they have some genuine Suzuki service manuals in pdf form, reasonably priced. The genuine service manual will have all the specs and testing procedures for your engine.

Suzuki’s CDI’s are fairly robust and rarely act up. As far as testing one I have no idea nor have I read anyone testing one.
 
I did check the manuals and found:

The DT4 and DT5Y models have an ignition which uses 1 ignition coil, a single primary coil, one pulser coil, an optional lighting coil. The CDI unititself electronically advances the ignition timing when firing the spark plugs. The secondary ignition coils and CDI unit are separate components.

To test the pulser coil, connect the digital multi-meter between the white/red and black wires. Resistance should read 1 5.0-45.0 ohms for theDT 4 and DT5Y and 70-100 ohms for the DT6 and DT8.

So the pulse coil will be nice with its 22 ohm.

To test the lighting coil, connect the digital multimeter between the yellow and red wires. Resistance should read between 0.1 -0.2 ohms for theDT4 and DT5Y and 0.37-0.45 ohms for the DT6 and DT8

*)then I'm out. the wiring color is different and it should not be a lighting coil bud ignition coil. there's now explanation of the primary coil and the resistance.

when turning the magnetics, i will get >60Vac on the ignition and >2Vac on the pulse coil. i think this should be enough to generate spark.
 
Ignition is not my strong suit, actually not much is but that’s a discussion for a different forum.

To my understanding volts to generate a spark need to be around 15,000-45000 volts, so with you getting 60 volts that’s not enough.
 
thats correct. bud I'm measuring at the primairy side of the CDI. it means 60Volt will go in and depending on the voltage from the pulser coil youll get a high voltage at the output side that should be connected to the spark.
bud off course i'm not able to measure that high voltage.
 
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