|
No spark
Jun 13, 2018 19:29:39 GMT -5
via mobile
Post by tester on Jun 13, 2018 19:29:39 GMT -5
My son went to school and left a scooter for dead. Can't get it to run. Been through all the tests and everything checks out. Still no spark! UGH! Brake switch ,kill switch,key switch,stand switch......WTF!
|
|
|
Post by tortoise2 on Jun 13, 2018 21:21:54 GMT -5
Year, brand, model, engine cc's, modifications?
|
|
|
Post by 90GTVert on Jun 14, 2018 13:45:37 GMT -5
Guessing this is a 139QMB powered scoot? Checked for output from the exciter coil and pickup? Full details in video below. Quick version, ~50VAC from the exciter wire and ~0.5VAC from the pickup wire with them disconnected from the scoot harness while the engine is turned over as if trying to start. Tried a new plug? Got another CDI to swap in to see if that gets you spark? Coil tests (check a service manual)?
|
|
|
No spark
Jun 15, 2018 6:24:05 GMT -5
via mobile
Post by tester on Jun 15, 2018 6:24:05 GMT -5
Check all the electrical ,although I am no electrician I can trouble shoot. i feel its a switch....saftey , brake or otherwise. All continuity checks are fine .all AC power seems ok. I do not have a manual. It's a ToaToa 50 2014
|
|
|
Post by 90GTVert on Jun 15, 2018 7:58:00 GMT -5
With most Chinese scoots there is no specific service manual. Just use a generic one. Spark plug cap and wire secure? Should just twist on. If a switch goes bad and kills spark, it would ground the kill switch pin on the CDI. If there's no ground there, the switches should not be the issue. You should be able to check continuity between that and ground and watch continuity switch on and off with them. Ground for no spark, no ground for spark.
|
|
|
Post by tester on Jun 15, 2018 10:32:13 GMT -5
Going to check it all again and document all the numbers so I can reference them. Thanks for the help by the way,much appreciated! Also in the checks it state simply depress hand brakes and see if the brake light comes on. Mine is always on as long as the key is on.
|
|
|
No spark
Jun 15, 2018 18:03:53 GMT -5
via mobile
Post by tester on Jun 15, 2018 18:03:53 GMT -5
Still testing. UGH!
|
|
|
Post by GrumpyUnk on Jun 16, 2018 11:09:10 GMT -5
The electric starter is enabled by either brake switch, both of which are in series with the starter button. There's a diagram on this site that may help with that. Cranking the engine is a lot easier on the battery and starter motor if you remove the spark plug while testing.
The ignition switch grounds the CDI to stop the signal to the coil, stopping the spark. If the ignition switch is compromised it may be stopping the spark. A meter surely is a help when trying to determine the cause of a no-spark condition. You can see/measure the signals to/from the CDI. tom
|
|