KymcoForum.com
Scooters - 125 to 300 => People s200 => Topic started by: webslappy on March 31, 2019, 06:33:55 PM
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As part of the repair I had done at the end of the season, they put in a new spark plug. I can get it to start but as soon as I hit the throttle, it just dies. I just finished draining the gas and emptying the carb bowl. Put in fresh gas with octane boost and it does the same thing. Pulled the plug and it looks like this which I'm pretty sure it shouldn't. Any suggestions on things to try is greatly appreciated. Thanks.
Spark plug pic: https://imgur.com/mtnsRSi
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It could be caused by clogged jets in the carb. Did you make sure the carb jets are clean ?
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I didn't get that far yet, but from your reply that sounds like my next step. I don't know much about engines but as long as I can find a video, I'm game to give it a whirl. Thanks for the info.
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What was the nature of the repair last season?
Was it running then?
Stig
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i just posted about a similar problem, recently. http://www.kymcoforum.com/index.php?topic=27834.0, (http://www.kymcoforum.com/index.php?topic=27834.0,) titled 'pilot jet question' in the General Discussion area.
if it starts then dies when you give it a little throttle it is very likely your pilot jet. I just cleaned my pilot and main jets recently. Totally solved the problem of stumbling off idle. I'll attach a pic of mine. In the pic I unhooked my carb enough to fip it over and remove the bowl to get to the jet. You'll need a VERY small wire to get through the hole in the pilot jet. I used a wired from a wire brush but the wire from a bread twist tie may work. You'll also need a spray can of carb cleaner. The yellow arrows in my pic are attempting to point to the pilot jet.
Do a search on youtube for GY6 150cc carb cleaning. Plenty of them..
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What was the nature of the repair last season?
Was it running then?
Stig
Stig, I had another post last year where my scoot was at the mechanics all summer and got it back just in time to put away. The mechanic replaced the stator wire and CDI unit and it seemed to have fixed it (at least in my 1min test in 30 degree weather). That issue was bogging down at high speed and this is cutting out when throttled. As I type this, it makes me think the issues may be related because they're both under throttle conditions. Does that seem like a logical conclusion?
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Thanks, lahawk. I'll do the carb and pilot jet clean as my next step.
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Since I have limited engine experience, I bought a used donor carb on eBay for $10 that I'll use as my patient. I'll let you know how it goes. Thanks for all the tips.
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Thanks for the help. I pulled the carb, cleaned it and reinstalled it. Fired right up. No more stall when throttled.
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Excellent! Did you clean the entire carb...just the jets...?....and this is the first time you've ever worked on a carb?
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Yep, first time working on a carb. I removed the whole carb and intended on doing a thorough cleaning but got a little intimidated by the whole thing so I just cleaned the jets and one was completely blocked so I was hopeful that was my problem and it was. Thanks again for your help.
Related question. Is there an additive I can add to the gas to help keep the carb cleaner longer?
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Yes, non-ethanol gas! Or ride every day! Or both!
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Can I just add ethanol remover like my brother does for his boat engine?
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I’ve always run non ethanol gas with marine stabil (the blue stuff) in every tank...and my carb jet still got plugged. I think it’s just the nature of the beast..especially if it’s not ridden regularly. My problem is my scooter may sit for 1-3 weeks between rides. I’ve thought about starting to take 2 extra minutes and just drain the carb bowl after each ride....but haven’t done it, yet!
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Use tier one gas from a busy brand name station. The more crap you add to it out of bottles, the more likely you are to cause problems. If you read enough forums, you will start to notice a couple of things. One is that most photos of epic variator failures feature Dr. Pulley sliders, but they usually don't get the credit they deserve. Another is that most of the problems with gas are experienced by people who "improve" things by adding stuff to the tank. Do you think people in Asia or Europe who ride these things thousands of miles a year are putting magic sauce in the fuel?
An excellent thing to clean carburetor jets with is the smallest guitar string. It will go through anything and you can buy a lifetime supply for about $6.
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(Hey!
Walmart sells 62 kinds of magic sauce across 7 feet of shelf space !
They wouldn't be duping us would they?!
Filling stations I frequent are mentioned by BMW and VW (& the PTA & AA, I think) as being good.
All top tier pumps have all the additives we need for strong healthy & happy scooters.)
(Stig)
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I broke down and took it to a place that repairs Kymcos. The diagnosis is that it needs a whole new carburetor. Any suggestions on where to buy one online? I looked on eBay and couldn't find anything in the US. OEM is preferred but a quality non-OEM is fine too. Thanks for the help.
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If you get one from Taiwan, it will take a few weeks, but the price is going to be better. That would be the best way to get one.
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I bought a set of different size jet cleaning wires/files in a nice metal packet for $1.98 on ebay (from China, of course).
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If you get one from Taiwan, it will take a few weeks, but the price is going to be better. That would be the best way to get one.
Do you have any recommended sites where I can get one from Taiwan? The cheapest new online I could find was $195.
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On April 6, you posted problem fixed after carb cleaning. Did something else happen after that? Why did you take it to the shop again?
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On April 6, you posted problem fixed after carb cleaning. Did something else happen after that? Why did you take it to the shop again?
Unfortunately, yes. I thought the issue was fixed but it wasn't. After the carb cleaning, it was less frequent but still bogged down. I took it to a Kymco dealer and their diagnosis was a new carburetor. They wanted $450 to replace it but I ordered a new OEM for $185. It arrives today and I'll put it in this weekend. Hopefully, that will end this saga.
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This one can be wrapped up. Finally! New carburetor ($180) and about 30 minutes to install. Took it on a long ride to work and runs like a top. Since we skipped Spring in Michigan, it's ready for Summer.
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That is great! Clean up the old one if you still have it. One or more of the passages are probably plugged. Or peddle it to someone who can clean it and use it.
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This one can be wrapped up. Finally! New carburetor ($180) and about 30 minutes to install. Took it on a long ride to work and runs like a top. Since we skipped Spring in Michigan, it's ready for Summer.
Thank you very much for posting your "solved!" report!
Glad you got it sorted.
Stig
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Did you get your new carb through the dealer or on line?
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That is great! Clean up the old one if you still have it. One or more of the passages are probably plugged. Or peddle it to someone who can clean it and use it.
Or you can toss it and move on. It's an old broken carburetor. Why do you want to keep it around or sell it to someone who somehow got the idea it has value and then is out that money and time before they break down and buy a new carburetor and fix the problem.
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Only thought I had was it takes time to open up clogged passeges in the carb body. Soaking a couple of weeks in the carb cleaner bucket (with the parts basket, blue can) usually softens the clogs enough to blast 'em out with air. Jets cleaned and still same problem, passages clogged.