150cc automatic engine gy6 there is no Spar k Troubleshoot find solution
Verify that the spark plug wire ends are securely twisted into the screw studs in both the plug boot and coil. Check continuity of CDI-to-coil wires, and engine-to-frame ground wire. Some multimeters have an audible tone continuity feature
"i suspect that there was an intermettent spark due to dirt from the stator and flywheel"
”that spark plug wire and braided metal hose seem a little chummy”
”the wiring harness was getting pinched between the frame and the floorboard!! This was grounding out the ignition or power to the CDI box” .
”Put some crushed ice in a plastic bag. When you have a no spark situation chill the CDI or the coil, and see what happens. Do them one at a time.”
”Pin plugs are jsut holders for individual small electrical connectors, and sure enough one of the connectors had backed itself out.”
”The first thing you should try is to disconnect the black/white wire from the CDI connector and then check to see if you get a spark. This test will indicate if the problem is with ignition components or in the scoot wiring. With the black/white disconnected and you still do not get a spark, the problem is within the ignition system component parts. If you do get a spark, then the problem is with the ignition switch, kill switch, sidestand switch, or the wires going to those switches.”
A miniature flat-tipped screwdriver can be inserted into the plastic housing to bend down the tang for temporary ground wire connector removal.
”The lesson I learned from all of this is that you can't determine anything by measuring voltages out of the stator with the CDI hooked up.” . .
Ignition Troubleshooting: No Spark
CDI Troubleshooting
”Ive tested a stator before that ohmed out fine but after it ran for a while it lost spark because of low quality windings.”
Replacing the GY6 150cc stator requires first removing the shaft nut (lefty loosy) with an impact wrench, or securing the flywheel with a strap wrench and using a socket wrench/bar, then attaching a 27mm x 1.0mm left thread puller to remove the flywheel. Replacing the 139QMB 50cc stator requires removing the flywheel with a 24mm x 1.0mm right thread puller. The ATV panels may obstruct the use of the combination 50cc/150cc cross puller design, but a 10mm bolt from a hardware store can be substituted.
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