Idle issues By darrica (Read 1,110 times)

[darrica]

I just bought a 2007 Schwinn 49cc scooter. It starts, but I have to really crank on the fuel to keep it idling. It dies every time I come to a stop. Any ideas?

[motley]

You probably have a more advanced problem, but this is worth a shot until an actual mechanic can help you.

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Try adjusting the idle fuel mixture

Example:



I know you have a 50cc but the video still applies.

Also adjust the idle screw. The gap should be somewhere around credit card length. Very thin. Once you have that gap play with it. Wait for the bike to get warm if it'll stay running. if you can get a very nice idle, let the bike cool down. Maybe an hour latter return and see where your idle is at, should aim for a tiny adjustment if anything, just enough to keep it running until warm again. Just a tinker.

*If that is nothing but a fail, you have a little more advanced issue than some screw.

Also check the tube going coming off the back of your carb going to the air box. If it appears to be on correctly, I would attempt to tighten it. Anything else I would adjust it, and get it nice and tight.

It's really cold out, and needing to adjust your bike on bipolar weather is a little annoying.

I hope your problem can be fixed shortly

[czmdiver]

Most likely the Carb Mixture screw is Plugged.
Try simply adjusting the Idle screw itself. very simple..

[darrica]

I tried both adjustments you suggested and neither really made a difference. I did notice there was a screw missing from the carburetor cover, of course no one around here sells them. My husband told me to just buy a new carburetor. All houses are tights. We'll try draining the fuel and putting fresh in, it's been sitting since last summer.

Thanks for the advise, the project continues.

[cyborg]

Pilot jet may be partially plugged with a bit of debris

[lostforawhile]

I need more information, how long did this sit,is it a gravity fed tank? 139qmb? If it sat for any length of time with ethenol fuel, you need to drain and flush your tank, change the fuel lines,if it has a pump,plan to replace it,if it's gravity fed, you need a new fuel petcock most likely, if it sat with ethenol fuel in the carb,just get a new carb, it's not worth fixing,it corrodes the crap out of the carb,and eats the rubber parts, replace the vaccume lines to if they sat,and no change the oil,gear oil,and spark plug