Baja SC50 QMB139 No Spark

Introduce yourself, what you ride, post pics, seek or offer help, general chit-chat.
User avatar
4Strokes
Site Admin
Posts: 1230
Joined: May 02, 2016

Baja SC50 QMB139 No Spark

Postby 4Strokes » Sun Jun 05, 2016 10:11 am

Topic: baja sc50 engine swap - no spark
Author: bc117
Posted: 01/01/2011 12:47:34 PM

hey just swapped in a supposedly brand new qmb139-3 engine in my baja because the old qmb139 engine self destructed and i had to swap out the stators, just got that done yesterday all the lights, horns,starter, etc. work but when im cranking the engine with the starter there is no spark, i need some help figuring out what i did wrong

Reply by bc117 on 01/01/2011 12:49:27 PM
i have a 6 pin cdi box and i noticed a red wire had been ripped out of the connector would this be my problem, also would pick-up gap or something be a contributing factor?

Reply by bc117 on 01/01/2011 2:55:13 PM
hey i reconnected the wire and im getting spark but im not sure how to actually get the wire back into the connector, its just touching.

Reply by bc117 on 01/02/2011 1:20:59 PM
hmm gettin spark but engine doesnt even hiccup when i spray gas into the manifold.

Reply by Admin on 01/03/2011 07:50:36 AM
Are you getting spark at the end of the spark plug?

Reply by bc117 on 01/03/2011 1:02:03 PM
ya im getting spark from the plug i got it to run for about 5 seconds today i had a brain blast and poured some oil down the manifold sense it started to sound like low compression yet its a new engine? so poured the oil and the sprayed some gas in after i cranked it with the oil and it ran for a few seconds off the gas i put in, so now im wondering if the valve clearances are too tight or may something else be wrong? maybe a topic for the engine forum?

Reply by bc117 on 01/03/2011 2:57:00 PM
i put the carb on and it runs but now i need to find the kill wire the key and the kill switch have no effect and it may be because one of the wires in the cdi is loose?

Original URL: 4strokes.com/forums/topic.asp?TOPIC_ID=32450 © 2016 4Strokes.com

Return to “Chinese Mfrs Community”

Who is online

Users browsing this forum: No registered users and 1 guest