george
Scoot Junior
new 50cc and sluggish
Posts: 7
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Post by george on Jan 27, 2015 17:15:15 GMT -5
after installing a new spark plug my electric start work as if it was new. now after 3 months its back to it doesn't want to start. I can usually start it if I kick start it about the 3-4th try.
after it starts it runs as if it was new
what do you suggest I try to solve this problem
I'm away from home and limited on mechanical tools but am able to do a few things
HELP I NEED THIS TRANDPORTATION
George
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Post by birdman on Jan 27, 2015 17:37:03 GMT -5
how does the tip of the spark plug look? what kind of spark plug are you using? Part number please?
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Post by 90GTVert on Jan 27, 2015 18:44:57 GMT -5
Is it cold where you are? They sometimes struggle to e-start in cold weather. Maybe the auto-enricher has failed and is stuck closing off the fuel passage so you don't get the extra fuel for the start up.
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george
Scoot Junior
new 50cc and sluggish
Posts: 7
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Post by george on Jan 28, 2015 9:59:08 GMT -5
The new plug I installed in October was a NGK C7HSA replacing the original it looked blackened but very lightly as if it had a light dusting on it I saw it as nothing remarkable.
I was in cold weather but now in Alabama and it's 45 degrees. Temp should not be the problem. I smell gas after e starting. Let it rest for one-two minutes and sometimes it will e start. If not 2-4kick starts and it will run.
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Post by 90GTVert on Jan 28, 2015 11:05:39 GMT -5
I would take the auto enricher out and measure it when cold. Then reinstall and get the scooter to run for about 5 minutes. Remove the enricher immediately after the scooter has warmed up. Measure again. If it is functioning as it should it will be shorter when cold than hot.
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Post by Fox on Jan 28, 2015 15:38:04 GMT -5
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Post by humanshield on Feb 2, 2015 17:22:46 GMT -5
In addition to what others have suggested, I would take the battery and have it LOAD tested. Makes no difference how old it is. If for any reason the battery is not delivering enough amps you could have this problem.
Just a thought. Good luck.
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george
Scoot Junior
new 50cc and sluggish
Posts: 7
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Post by george on Feb 7, 2015 9:51:30 GMT -5
hi everyone: a lot of good advice. took off the carb and wanted to clean the jets out. discovered they we un accessible due to the fact all the heads of the bowl were sheered off. must of happened at the factory. so ordered a new carb from scrappy dog (got it in 3.5 days) installed it and the engine started. also put in a new battery. adjusted idle speed and decided to go for a ride to charge the battery got 3/4 of a mile down the road and the bike quit dead and ended up walking it home. so what now I don't know. it seemed fixed ? any ideas
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george
Scoot Junior
new 50cc and sluggish
Posts: 7
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Post by george on Feb 7, 2015 9:54:50 GMT -5
90GTVERT your attachments and advice lead me to tackle this stuff thanks for the help
George
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Post by niz76 on Feb 7, 2015 10:39:54 GMT -5
Just buying a carb and installing it and running your scoot can be a dangerous practice. It needs to be jetted correctly for your scooter. You'd assume a stock 139QMB carb would come with the correct jets for a 139QMB stock engine, but you know what they say about assuming... Might be a good idea to either get your stock carb open somehow and swap the jets in or at least get some new spark plugs and check the plug color to make sure you're not running too lean. Tons of info on this stuff in the Tech Library.
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Post by 90GTVert on Feb 7, 2015 11:34:41 GMT -5
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george
Scoot Junior
new 50cc and sluggish
Posts: 7
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Post by george on Feb 7, 2015 16:23:15 GMT -5
ok scooter guys here is a new twist could not start again so I checked spark got spark checked gas the pump spit gas when I cranked it plug looked clean. sprayed in either starting fluid and it started. not trusting it I let it idle and it went hi an low when idling finally leveled out ok test ride (smart enough not to go too far this time) well it must of warmed up enough and it stalled {stopped} would not start but I had my starting fluid sprayed into air snorkel and it started ran for 200 feet and died again second starting fluid and no go
so when it is warm it will not run what the heck is going on what can I do to solve this issue
any suggestions i'm scared it might be a valve adjustment but it runs good in cool state
thank you scooter guy away from home needing to get this bad boy running
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Post by scooterpimp on Feb 7, 2015 17:41:47 GMT -5
Sounds like valve lash checking / ajustment time!
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george
Scoot Junior
new 50cc and sluggish
Posts: 7
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Post by george on Feb 8, 2015 15:12:42 GMT -5
hi all well I went back to start and was thinking maybe I could start the scooter with the old carb and starting fluid. THE ONLY DIFFERENCE WAS A NEW BATTERY and DAMN if it didn't work. not trusting it I let it idle a long time then took it for a ride it idled fine and ran as it should. needed spray to start it but after it started it worked. so in conclusion spark gas good performance just hard to start. some day I might try to remove the sheered off screws under the bowl and give it a proper cleaning. the question remains why did the new carb start but not run when it gets warmed up. is there something I should of done to get it to run bought it from scrappy dog and just installed it did not mess with anything. thanks for suggestions and more ideas I'm listening
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Post by humanshield on Feb 8, 2015 15:35:16 GMT -5
I would of checked the compression on this motor from the git-go. Whenever I meet a new scoot, or start having a new problem with a scoot, compression is numero uno. If your compression isn't where it needs to be, you gonna keep having all kinds of trouble. As far as why did it not run when it warmed up? Wheel, think about this....when it's cold it needs more fuel. The choke provides that function. By chokeing the carb, you increase vacuum in the intake and that sucks up mo-gas. As it warms up it needs less fuel to idle. Why? Because the fuel ATOMIZES better in a hot arena compared to a cold place. In a cold motor, the fuel tends to get dropliminated, you know, coagulatory and makes drops that just run down the intake and cylinder walls. once it's all hot in there, that problem diminishes. What am I struggling to say here? Wheel, maybe you're running too rich bro.
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