no spark By accord911 (Read 2,701 times)

[accord911]

2003 50cc moskito scooter doesn't have any spark. changed the cdi box. I don"t know how to test the wires or the coil, i know its has to be one of them. The bike only has 2000 miles on it. please help p.s. do anyone know the the values when you test a coil and how to test a coil. thanks

[JR]

Could be the coil but also could be the stator not supplying voltage to the CDI? Finding any information on this scooter is tough. Do you have a manual with a wiring diagram? If not then I'm going to go by things I know common on two strokers.

I need to know how many wires and the colors from the stator. Same thing on the CDI, how many wires to it and their colors.

Now testing a coil is very unreliable but on a lot of coils for two strokers you test the primary and secondary coil resistance. Primary coil resistance will probably be between 0.15 to 0.19 ohms.

Secondary coil resistance will be 7 to 10 ohms.

JR

[accord911]

the stator has a blu/ yel and a blk/ red both of them are coming out of the stator. Going to the four pin connector from the stator is a wht/ red , wht ,yel/ red , blk just can't find any four pin connectors only three pin thank you....... ernest

[JR]

OK looks like a standard 2 stroke set up and let me make sure I got this right?

blue/yellow = pulse signal wire to CDI
black/red = Ac voltage feed to CDI

Then the other wires are white/red, white, yellow/red and black?

I think this is your stator;

.scooterparts4less.com/web_gas/2-stroke_50cc_jog_stator_logo.jpg" rel="nofollow" target="_blank">.scooterparts4less.com/web_gas/2-stroke_50cc_jog_stator_logo.jpg

I also think this is your CDI;

scooterpartsplace.com/50cc-two-stroke-cdi-unit.aspx


Now I know black is the ground and I believe the red/yellow and white are AC feeds to the R/R and the last wire is it a red/white single wire? If so it goes to the CDI also.

JR

[accord911]

i notice the cdi box has a 2 pin connector and the stator has a 3 pin connector. can you let me know about this thank you

[JR]

You said you changed the CDI and there are different styles on 2 strokes. So did you buy the exact same CDI as the one you replaced? I really am confused as to what you're saying about the stator.

I need pictures of all the wires from your stator, each one and the colors of each plug.

Then I need the same of the CDI how many wires on it, how many plugs.

It sounds like to me you didn't get the right CDI? Also some of the wires on the stator go to the R/R.

JR

[accord911]

sorry to confuse you. my stator has a four pin connector and the one you showed me has a three pin. How do i post pictures i have them

[alleyoop]

Use Photobucket it is free, most of us use it. Then you can upload your pictures to photobucket and then Share them with anyone.

photobucket.com/

Here is a HOW-TO for Photobucket:
Alleyoop

thescooterprofessor.proboards.com/index.cgi?board=directory&action=display&thread=90

[terrilee]

ifna u aint gotten no multimeter
u best b getin 1 soon,

the goot ppl here tuaght me to
track done my magneto ?
wow fun, BUT i am NOT a mech.

& donna b getin me started on
fly wheel pillers

mayb cause i cried enugh they was taking pity on lil ol me



or maybe causing i thretned 'em all

[accord911]

Here are the photos

[accord911]

the first picture is the original cdi box , i bought the red one. my stator has a four position conn.

[accord911]

this is my stator

[JR]

Ok like I've said been gone and will be back by this evening. Your new CDI is apples to apples and should just plug in. Now since I see your wires I can tell you what to test for. The 4 plug is wires going to the R/R and autochoke and will have nothing to do with the scooter running.

So get the volt meter out and set it on AC volts and put one lead on the single black/red wire from the engine stator and the other lead to ground and turn the engine over. You should get 50Vac+. This feeds the CDI. Now the single blue/yellow wire from the stator is the CDI signal pulse wire and again set the meter on AC and test it with the engine turning over. You will get as little as 0.5Vac and as much as maybe 2Vac.

If these check out and the new CDI you bought is good and you find no bad wires or connections then more that likely it's the coil. One thing we can check is the engine kill wire also, if it's grounded out or the kill switch is stuck in the closed position then the CDI will send voltage to the coil.

I'll ask you a question? Does the single black/white wire from the CDI plug into the yellow/black to the coil? If so the orange wire is the kill wire. If the orange wire goes to the coil then the black/white is the kill wire.

Which ever one of these wires goes to the coil the other one is the kill wire. Simply unhook which ever one that is the kill wire and then test the scooter for spark by turning the engine over. If this lets the engine spark and run then we got to find out what the problem is.

It's either a bad kill switch/key switch or it's grounded out somewhere?

JR

[accord911]

Thank you for the info I'll get on it and let you know. You guys are so smart with this scooter stuff. thank you so much have a nice one.

[terrilee]

see i tole ya.
dem's here some goot ppl.
be polite & pics always help 'em

dont foget thank you's