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Post by bryce0515 on Jul 23, 2012 12:24:35 GMT -5
I have a 03 qingqi h1e41qmb 50 cc 2stroke. I have an ignition tester which i grounded the plug to a good known ground. wile im cranking it over a spark occurs then goes away then comes back and goes away, very intermittent.
I have a brand new spark plug, I checked resistance of plug wire/boot. I have replaced what i believe to be a cdI or voltage regulator (4 wire grey box that grounds itself on the frame underneath the headlights). Has anybody ever worked on a h1e41qmb qungqi before there is no schematic that i could fine in order to trace the wires correctly without completely dissembling all the plastic, its very brittle.
Does anybody have any suggestions in something i should test or parts to throw at it. And if anybody knows how many a/c volts comes out of the stator while cranking?
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Post by OverReved on Jul 23, 2012 14:07:06 GMT -5
While cranking you need 95 volts AC to supply the CDI with enough voltage to charge the CDI capacitor with dumps it's Electrons into the coil jumping the 400 volts of the capacitor to 40K volts at the plug. You also need .5volts or more AC at the wire coming from the timing pickup going into the CDI to initiate that spark. Slow cranking or bad windings will cause your AC voltages to be below specification. A shorted open or grounded wire inoperative coil pick-up or completely damaged stator will cause a loss of all AC voltage at the CDI for the respective wire.
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Post by bryce0515 on Jul 23, 2012 18:46:48 GMT -5
ok thank you for the information. Do you or anybody know were the cdi is located? and is the grey box underneath the headlights the regulator or cdi?
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Post by OverReved on Jul 23, 2012 18:58:12 GMT -5
Regulators tend to have fins on the metal cases, these keep it cool since it has to dissipate some electrical power when the bike is not using it. CDI would be a plastic looking rectangular box with a smooth shiny epoxy inside it. I don't have pictures handy nor am I familiar with your model, perhaps someone has a picture you can check.
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Post by bryce0515 on Jul 23, 2012 19:07:23 GMT -5
Ok so i just tested the stator, on each wire im getting 0.00 ac volts for a couple revolutions then ounce and a wile it will jump to around 20-25 ac volts, on all 3 wires i get the same thing.
So i should probly throw a stator at it and see what happens because thats about 1/4 of what its suppose to be and at times. And it resembles what the spark plug will do once and a wile using the spark tester, and it wasnt a very bright strong spark.
Am i going the right direction?
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Post by bryce0515 on Jul 23, 2012 20:27:28 GMT -5
ok so i replaced the regulator.... Thank you
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Post by lethalp1mp on Jul 23, 2012 22:38:03 GMT -5
ok so i replaced the regulator.... Thank you I have the same bike, the CDI on mine is on the exhaust side of the frame by the tank near the carb. If you need me to, I can take a pic. Mine's currently naked while I work on it. I also have the owners manual which has the wiring schematics I can snap a pic of as well.
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Post by bryce0515 on Jul 24, 2012 7:04:59 GMT -5
yes I would love a picture of the cdi and a schematic of the ignition circuit would be amazing.
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Post by lethalp1mp on Jul 24, 2012 13:04:54 GMT -5
yes I would love a picture of the cdi and a schematic of the ignition circuit would be amazing. Here's where my CDI is: And here's the link to the wiring schematic: (large image so I'm just linking to it) Wiring Schematic for H1E41QMB
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Post by bryce0515 on Jul 24, 2012 20:50:57 GMT -5
Thanks for the pictures, the cdi on my bike is below the floor on the frame, must be a diffrent year. I stript everything off today and unwraped the whole harness to make sure there are no loose grounds or shorts. Everything checks out to be ok im just waiting to get a stator.
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Post by lethalp1mp on Jul 25, 2012 1:09:01 GMT -5
Thanks for the pictures, the cdi on my bike is below the floor on the frame, must be a diffrent year. I stript everything off today and unwraped the whole harness to make sure there are no loose grounds or shorts. Everything checks out to be ok im just waiting to get a stator. No problem. Hopefully it helps. Mine is an 03 too, maybe it's a different model scooter. Mine is a QM50QT-3E.
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Post by bryce0515 on Jul 25, 2012 7:26:13 GMT -5
i believe it is a different model by the picture. How would I figure out the model? Everything for this scooter is impossible to find that might help me. I usually end up going down to the junkyard in Miami to get all my parts.
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Post by lethalp1mp on Jul 25, 2012 10:26:12 GMT -5
Mine came with the manual and parts catalog. I also bought mine used from a guy that used to sell Qingqi. It also has a name plate on the frame near where my CDI is located. They most likely have the same frame though. Along with the 100 other Chinese scooters. I think it is called "sunny style" for the frame and body pieces. I'm going through the same issue with finding parts. From what I can see, frame and body-wise, most of the "sunny style" parts are the same. I have to replace most of my painted plastics due to their brittleness and screw posts and tabs all being broken.
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Post by bryce0515 on Aug 8, 2012 12:09:21 GMT -5
Do you have a schematic of the kill switch i wired one up i just wanna verify that its correct.
Update: Ordered stator for 55 dollars waiting to install and try.
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Post by lethalp1mp on Aug 8, 2012 20:04:35 GMT -5
Do you have a schematic of the kill switch i wired one up i just wanna verify that its correct. Update: Ordered stator for 55 dollars waiting to install and try. In the schematic I linked, it's called the starter switch.
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Post by bryce0515 on Aug 14, 2012 17:13:44 GMT -5
ok so I installed a brand new stator and still I have no spark. Does anybody have a clue where I Should go from her, any tests I should run? should I get a new cdi or coil?
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Post by OverReved on Aug 14, 2012 17:32:32 GMT -5
Follow the spark test as you go. Stator makes the voltage for the spark That voltage travels through the wiring harness to the CDI The CDI holds that voltage in a capacitor till the pick-up on the stator tells it to release it The voltage when released from the CDI travels through more wiring harness to the coil The coil takes that voltage and steps it up to a very high voltage that voltage then looks for a way to ground its self- it will travel down the ignition wire into the spark plug boot and finally across the gap of the plug to a grounded engine If you have a grounded kill-switch wire the spark never makes it out of the CDI
All of these stages are testable. Problems are easy to locate if you look at one step at a time. Throwing parts may not work and could damage new parts.
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Post by bryce0515 on Aug 15, 2012 17:06:30 GMT -5
ok so im getting a constant 50 ac voltage coming out of the stator. I cut the ground wire for the kill switch so thats out of the equation, and im not getting any a/c voltage coming out of the cdi but i do get around 4 volts dc, and still no spark? Is the cdi defective since I replaced the stator wich has a new pick up coil on it?
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Post by bryce0515 on Aug 18, 2012 15:54:31 GMT -5
ok so finally i just got my cdi from scoot u.s.a and i now have constant bright spark. Im guessing when my dad and I were welding the custom exhaust we grounded the pipe and didnt realize the battery was plugged on and used the whole bike as a ground and fried the stator and cdi.
Thanks every one that gave advice, schematics, and pictures i truly learned alot about this scooter through this adventure lol.
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Post by softis73 on Sept 9, 2012 5:42:22 GMT -5
2008 Qingqi QM50T-10
H1E41QMB engine
Hi
I have tested the stator it has 3 wires
39.2 VAC black/red wire to ground (when cracking the engine)
4.3 VAC white/red to ground (when cracking the engine)
3.4 VAC yellow to ground (when cracking the engine)
tested with a test light too and it glows on all 3 wires
my CDI has only 3 wires
39.2 VAC goes inn and there is a green for ground and there is a white/blue that goes to the coil. (when cracking the engine)
the white/blue does have aboute 100 VDC when cracking the engine not connected to the coil and the test light vil not light. no VAC. when connected to coil no Volt
I have tested the coil direct on a batt and it works I think, it give a little spark
so is it the CDI or Stator that is broken, I think CDI?
do you know?
have you got a repair manual for this scooter
so I cant check the reading if they are right?
thanks in advance Ronny
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Post by bryce0515 on Sept 11, 2012 12:32:19 GMT -5
If your getting 39 v going into the cdi through the black/red wire tells you that your stator is good, and your getting a good groung through the green wire. But your not getting any output blue/white wire out of your cdi, i would say your cdi is defective. kancho.b0rk.com/forumpics/scooter/H1E41QMB_wiring_schematic.jpgtheres the link for the schematic
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