IF this is a 50 Hp Johnson marine motor, you may have a problem with the flywheel magnet or the stator coil that is under it.
Thank u ill check that if can get wheel off iv put everything new except that stuff ill start their tomorrow thank u
I've tested some wires comeing down from under the wheel while my son turns the motor over it reading 12 one set wires can't get to tho going up in their
There are multiple coils on the stator and different taps and coils. You probably need to use a puller to get the flywheel off and check all the wires and magnet.
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SOURCE: I have no spark 2000 KTM 125 sx
Before going to the CDI system go ahead and check the kill switches including the side stand switch, with an Ohmmeter. How good is the battery? Check the fuses. Check the wiring harness. Are all wires clean and with a solid connection? Any abraded wires? Check the operation of the ignition switch with a volt ohmmeter. Is the bike in neutral and the neutral light is lit up?
You can download a free PDF factory service manual by going to the website below >
http://www.carlsalter.com/motorcycle-manuals.asp
The manual should tell you in detail how to test the CDI and other electrics.
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SOURCE: 1987 Honda shadow vt1100c no spark at any plug
The voltage on the coils is present except at the instant of firing. The interruption of the voltage is what causes the coil to fire. The cdi box is what causes the voltage interruption.
The interruption is very hard to detect. You are not the first to be stymied by that box. If you have access to an oscilloscope, I think you can see the pulse if it occurs.
SOURCE: no spark put on a new cdi box coil good and a new
hi,sounds to me like your cdi pickup unit has failed,i am not 100% certain but this will be located on the end of the crankshaft behind one of the enginecovers,there could be two other possibilities,motox bikes are notorious for breaking wires so check the wiring from the cdi sender unit to the cdi box and the coil,also check your "off"button it may be stuck in the "kill" position..hope this helps..cheers ian
SOURCE: My Rm 250 wont spark
The Voltage From The Stator To The CDI Should Be Around 40 Volts(AC) At Cranking Speed. Be Sure Your Meter Is Set For (AC) Not (DC). The CDI Changes The (AC) Input Voltage To (DC) Output Voltage To The Primary Terminal At The Coil. An Electrical Shock Hazard Exist If Stator Voltage Is Checked With Engine Running. Always Perform This Test At Cranking Speed (R.P.M.) For SAFETY. 120 Volts (AC) Can Be Present With Engine Running.
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