2-Stroke - Spark Plug & Ignition Coil Testing
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- Be sure the on/off switch and fuel is turned on.
- Pull over the machine by hand 3 times, or for a short time if electric start.
- Remove the Boot of the Ignition Coil from the top of the Spark Plug.
- Remove the Spark Plug.
- Check Spark Plug tip is wet with fuel. If not, there is a problem in your fuel system (tank, carb, filter, etc).
- Test the Spark Plug to be sure it is firing correctly. This can be done with a Spark Plug tester or with a multimeter. To test with a multimeter, set your meter at Ohms (10 or 20k) and attached the Red wire to the top of the Spark Plug where you removed the cap. Next, touch the Black wire from the meter to the Spark Plug Electrode (the needle that sits under the metal that curves around the other end of the Spark Plug). A faulty Spark Plug will give a very low reading (0-0.05). Replace if faulty.
- If the Spark Plug is working correctly, re-attach to the Ignition Coil Boot. Hold the end of the Spark Plug tip to a metal section of the engine, and turn over the engine (you might need a friend to help if your generator does not have electric start). If all is working correctly, you should see a strong spark.
- If you do not get a spark, you next need to check oil level is at correctly level (to the very top as if about to flow out) and repeat step 7.
- If you still have no spark or it stops running within a few minutes of starting, disconnect the oil sensor wire (you will find it on the front coming from your engine) and try step 7 again.
- Still not getting a spark? Then you need to replace your “Ignition Coil” (For 2 Strokes – you will need to test the Ignition System further. Please contact us for a tailored testing guide).
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