Gy6 150cc 4stroke won’t start

[Roscoe]

If you have a DC ignition system here are some wiring diagrams ... pages 8 and 9 for DC... looks like you need 12 volts from the battery to the CDI to charge it and then the trigger impulse from the stator to signal the CDI when to pulse the coil. So I'd be checking the clearance of the of the trigger coil pick up to make sure it's sending enough signal to the CDI and the output of the CDI to the coil. I don't know the values they should be for a DC system. http://www.jr-richscooterdoc.com/Hel..._explained.pdf

[scooterrookie]

Originally Posted by Roscoe

If you have a DC ignition system here are some wiring diagrams ... pages 8 and 9 for DC... looks like you need 12 volts from the battery to the CDI to charge it and then the trigger impulse from the stator to signal the CDI when to pulse the coil. So I'd be checking the clearance of the of the trigger coil pick up to make sure it's sending enough signal to the CDI and the output of the CDI to the coil. I don't know the values they should be for a DC system. http://www.jr-richscooterdoc.com/Hel..._explained.pdf

I’ve done that.... still won’t deliver that spark 🤯🤯🤯.... I’m trying to find DC wiring harness diagram but the ones I e found so far, they are for AC and DC but different than mine...
I still gotta look around and keep troubleshooting


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[LuizzSF]

I have no mechanic skills but to me seems like you are doing everything right to me, why just try to reverse the trouble shooting, start from spark plug gap, then crank with spark out, then the trick with the screw driver in the boot, and make ur way back, , it worked to me, my coil pin was not working on a new coil.... just a suggestion

[scooterrookie]

Originally Posted by LuizzSF

I have no mechanic skills but to me seems like you are doing everything right to me, why just try to reverse the trouble shooting, start from spark plug gap, then crank with spark out, then the trick with the screw driver in the boot, and make ur way back, , it worked to me, my coil pin was not working on a new coil.... just a suggestion

I’ve tested the coil plug via volt meter as I was cranking there was volt output of 5.8V And the spark plug is brand new. Has three caps instead of one (Sport version). I will try the pulse test as the other member suggested.


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[GrouchyOle'Man]

It is not talked about very much, but when checking the "air-gap" on the pick-up module to flywheel clearance setting, make sure it is about .010". That is about the thickness of a standard business card which works well as a tool when setting it.