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Ok have an lt500 engine with no spark. Changed the pickup/pulse coil as the resistance was over 500 and definitely toast as new one is 235.
The magneto tests good resistance wise but I was told to check the AC voltage for output and am only getting 17 volts AC...been told that's not enough so do anyone know what the source coil output should be?Been told usually min 25 and some upwards of 100.
1. Check the peak voltage at the feed wire terminal on the ignition coil where the wire from the CDI is connected. (The wire from the CDI must be connected to the coil during this test.) The voltage should be at least 100 volts. If the coil is good it will spark with 60 to 80 volts, but not usually run good under a load. If it is over 100 volts and do not have spark, replace the coil, or plug cap or spark plug wire.
To measure peak voltage you need an oscilloscope or a digital voltmeter/multimeter with peak voltage capability or a peak voltage adapter that plugs into your voltmeter/multimeter.If you do not have a peak voltage adapter you can make one for about $2.00. Google how to make a peak voltage adapter.
Quote from: MotorGeek on January 09, 2016, 04:53:11 pm1. Check the peak voltage at the feed wire terminal on the ignition coil where the wire from the CDI is connected. (The wire from the CDI must be connected to the coil during this test.) The voltage should be at least 100 volts. If the coil is good it will spark with 60 to 80 volts, but not usually run good under a load. If it is over 100 volts and do not have spark, replace the coil, or plug cap or spark plug wire. Need to kick it over with spark plug out.With the below mentioned "oscilloscope or a digital voltmeter/multimeter with peak voltage capability" the motor DOES or DOES NOT need to be turning over (kicking it) during the test mentioned above?Quote from: MotorGeek on January 09, 2016, 04:53:11 pmTo measure peak voltage you need an oscilloscope or a digital voltmeter/multimeter with peak voltage capability or a peak voltage adapter that plugs into your voltmeter/multimeter.If you do not have a peak voltage adapter you can make one for about $2.00. Google how to make a peak voltage adapter. Thanks
Quote from: MotorGeek on January 09, 2016, 04:53:11 pm1. Check the peak voltage at the feed wire terminal on the ignition coil where the wire from the CDI is connected. (The wire from the CDI must be connected to the coil during this test.) The voltage should be at least 100 volts. If the coil is good it will spark with 60 to 80 volts, but not usually run good under a load. If it is over 100 volts and do not have spark, replace the coil, or plug cap or spark plug wire. With the below mentioned "oscilloscope or a digital voltmeter/multimeter with peak voltage capability" the motor DOES or DOES NOT need to be turning over (kicking it) during the test mentioned above?Quote from: MotorGeek on January 09, 2016, 04:53:11 pmTo measure peak voltage you need an oscilloscope or a digital voltmeter/multimeter with peak voltage capability or a peak voltage adapter that plugs into your voltmeter/multimeter.If you do not have a peak voltage adapter you can make one for about $2.00. Google how to make a peak voltage adapter. Thanks
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