Carbide 150 GY6 No Spark By ipapilot (Read 7,286 times)

[ipapilot]

Hello All,

As some others have obviously figured out, you guys appear to be the place to go for GY6 help..  I purchased a non-running buggy for my son with hopes of it being a fairly easy project for us and it has turned into more of a pain than anything else.
The carbide 150 has a dc system and that has provided its share of challenges as there is little troubleshooting data out there.  I have quite literally replaced every piece of the electrical system and still have not gotten a spark.  I have power to the CDI (I have 3 of them to work with).  I have power to a functional starter.  I do not appear to be getting voltage to the coil while cranking.  In fact, despite it being new, I don't appear to have any voltage reading from the stator signal wire while cranking.  The red/black shows signs of life with voltage (not connected to anything), but not the signal wire.  It does show about 139 ohms whether cranking or not.  The wiring harness and battery are grounded to the motor and the motor is grounded to the frame. It has a complete new wiring harness and 2 new cutoff switches from the manufacturer as well.

I'm happy to provide any other numbers I can to get this solved.. Thank you to anyone who can help provide some insight on this monster!

Brian

[Guitarman]

This sounds crazy, but is the magnet correctly installed in the engine? If it's backwards, you'll get juice, just not in phase and not enough of it.
I've seen so many of these engine get rebuilt and on occasion, things get installed wrong.

[Guitarman]

139 ohms sounds excessive, like it's not connected properly. I'm just not sure on that. I wish Rich was still with us, he kept that kind of data in his head.

In the meantime, since it's a project, it's probably time to open it up and look at the flywheel and stator. Make sure everything is correct in there.

[Alleyoop]

Well if you are not getting .5+ volts from the pick up coil when cranking then replace the pick up coil.
The CDI is not getting the signal to release the voltage to the coil.
Alleyoop

[Guitarman]

Thanx Alley. I knew I was missing a step somewhere.

[ipapilot]

The flywheel, stator, and pickup coil are all new and giving the same reading as the original I replaced. I replaced them for the same reason Alleyoop came up with. Guitarman, you mentioned a magnet in the engine.. The magnet is on the flywheel and the pickup coil should be getting a voltage reading when cranking. As I said, the black/red wire is but it is not used on the dc cdi. The blue signal wire is the one that I need to show something and it is not. Based on specs I have read elsewhere, the 139 ohms is pretty normal.

[cyborg]

Wire broken internally?

[Alleyoop]

Ipapilot,
How about a picture of your cdi with the wires plugged into it. The BLACK/RED should be the power wire to the CDI and if it is a DC CDI it should read 12volts when you turn the key on. Also if you can take a picture of your STATOR that you put in or the stator you took out and if they MATCH.
Alleyoop

[ipapilot]

This is the stator, flywheel and pickup that were removed.  They are identical to the replacement.  I assumed the pickup was bad based on the lack of signal on the blue/white wire.



The single black wire is the power wire on this dc cdi..  It reads 12.85 volts with key in "on" position.



This is the harness from cdi to pickup/stator.  The blue/white is the signal.  The black/red is not used.



And a wiring diagram just for reference...

[Alleyoop]

Ok bud, something is amiss here the stator that you took off is for a AC CDI see the POLE that is wrapped that is the one that feeds the CDI AC POWER.
Now if the one you put on is the same THEN your CDI is the wrong one. The RED/BLACK wire from the STATOR should go to the CDI as the power wire. That black wire is usually the wire that feeds everything else on the ride when the key is turned on. Was this thing rewired or something?
Alleyoop

[Alleyoop]

This is a AC CDI.
Alleyoop

[ipapilot]

Very interesting... It was not running when I got it, but that original stator had dirt in the flywheel so it was obviously running at some point. Looks like I need to pull the new one to verify what I have.. This is the part I purchased:(http://www.partsforscooters.com/164-289-Stator) How does the DC stator differ in appearance? I'll tear it apart tomorrow.

Even if someone had converted it to AC at some point, I have replaced absolutely everything in the system back to the original DC power. Of course, if I was shipped the wrong stator that explains the issue. This 'should' be a picture of the new one I installed:

[ipapilot]

I'm familiar with the AC cdi's thanks to all the research on this issue. If you reference my wiring diagram above, I think you'll see it matches up with the picture I posted of my CDI and it's wiring connector. The two pin connnector only has one wire that receives the 12V from the ignition, so the only thing that should come from the stator is the input signal blue/white wire. I'm honestly not sure what the green and white wires do, though they are hooked up.

[ipapilot]

If I didn't mention it earlier, even my wiring harness is new from the manufacturer..

[Alleyoop]

Well Here is a 8 POLE DC STATOR notice NO WRAPPED POLE.