No juice from stator By mhendrix12 (Read 508 times)

[mhendrix12]

Hey y'all,

I've got a GY-150cc and have lost any electrical current from the stator, to the CDI.
I have voltage for the lights, and charging system. Not problems normally encountered on a 1 yr old engine. Which would be more likely the suspect, the stator, or the pickup?

[Alleyoop]

How do you know you have not voltage from the stator to the CDI? If you checked while cranking it and no juice is being fed to the CDI then its your stator. The PICKUP COIL only gives out a pulse to tell the CDI when to release the VOLTAGE to the COIL.

Is your KILLSWITCH on the run position and your sidestand up(some have a killswitch on the sidestand as well and need to be up).
Alleyoop

[mhendrix12]

I meant the pickup that's stationary to the stator. What would cause one of these to stop producing electricity, a short in one of the windings?

I guess what i was asking is if why when i'm cranking it over, i get a voltage on the white and yellow wires that are for the lights, and charging, but no voltage from either of the other two, that go to the CDI

[Bashan]

Did you test them like this? The white powers the red wire to the battery and the yellow does most of the lights. Then you should have a blue/something pickup wire that sends a pulse to the CDI and tells it to fire. Then a black/red wire that provides energy to the CDI for the coil burst. They are both AC so make sure your multi is set correctly. The B/R should be 50v AC+, more like a 100v AC. The pulse wire is very slight voltage, .5v AC or even less. So make sure your ranges are correct. They are two separate systems, the R/B is off of a dedicated magneto coil in the stator and the pulse generates it's own power as a magnet passes underneath. For two separate systems to fail at the same time is unlikely. Make sure you test the wires uncoupled in the middle, and the test ground probe hooked onto the frame somewhere, don't use the stator side of the unhooked wire for your ground. Let us know if you still are getting zero on both wires using the above tests and parameters.

[mhendrix12]

i did that, and the results were just as you stated above, for the one i have runnin, but this one produces no electricity from either the blue or red/black.

think i just need to change the stator? they're either good or bad, aren't they?

Is there a timing mark you have to adhere to, for the pulse voltage?

[rapidjim]

Yes the stator comes with the pickup on a GY6

Jim

[chihuahuas]

Get a new stator but don't just hook it up blind. Check to see if the colors are the same on the plug for charging. Also you need to be aware there are 2 different types of single phase stators. 1 is half wave and the other is fullwave, You're describing a half wave setup.
You will need a flywheel puller.
Have a Drink.

Ohms reading on Ign coil on stator is like 500 ohms. Easy enough to check. I suspect it will read open.