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Got a genuine buddy scooter 125cc that had water in the gas. scooter wouldn't start, I drained gas and replaced with new gas and added sta-bil fuel stabilizer. Now it will start and run for a short time but will die if throttled/gassed. What should ido next

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  • Motorcycles Master
  • 7,482 Answers

Hi Sure ok

Sounds like you have dirt/debris in your caburetor jets,fuel passages or a diaphgram that is becoming non-flexible.
Check/Clean/Replace your Air Filter, a dirty air filter can make your engine run to rich with fuel.
Also be sure to check and clean your spark arrestor in the exaust,if you have one installed on your engine.
Note: ALWAYS USE COMPRESSED AIR TO CLEAN YOUR JETS AND PASSAGES, VERY IMPORTANT.
Note:Before you disassemble the carburetor:
Write down on a piece of paper or take a picture of how the linkage attaches to your carburetor for later reference when you go to reinstall your carburetor.
Mark each piece with a awl, or some kind of instrument that will make an alignment scratch before you disassemble the carburetor into separate pieces.
That way you will know which way it goes back together when you reassemble it.
Sometimes you can get by with priming the carburetor or by using a very small shot of starting fluid and letting it run a few times like that, and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Be sure to check your fuel tank for water and dirt/debris, if there is water/debris then you need to clean your tank.
Check you fuel line condition after a while they will degrade and need replacment.
Check/Clean/Replace your fuel filter if you have one, normally they are located in the fuel tank of chainsaws and weedeaters.
When you remove your fuel lines from the carburetor be sure to make a drawing to how the lines are connected to the carburetor or take a pictue for later reference.
Normally the big line will be the line the fuel filter is connected to inside of the tank.The smaller of the two lines is the return to the fuel tank from the carburetor after it is pumped thru the carburetor by the primer bulb.
Make sure you are using fresh fuel...and oil if your using a two cycle chainsaw or weedeater with the oil to the right mixture...too much oil as it can cause hard starting and excessive smoking.
If the chainsaw/trimmer is over a couple of years old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
The diaphgram may look good and flexible, but it can be deceiving and not act as a fuel pump as it should because it has become too hard and will cause hard starting,start and run and shut off, etc.
When you clean your carburetor, I recommend that you use a laquer thinner type cleaner to clean and dissolve the laquer build-up in the float and needle jet passages.
Be sure to remove all plastic and rubber parts before using the laquer thinner because it can dissolve the plastic parts and render them unuseable.
Be sure to use COMPRESSED AIR to blow out all the fuel and air passages.The higher air pressure is needed to blow some of the trash/debris from the fuel or air passages.
Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.
Keep in mind that the float (if you have one) for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit, or you could also ask the parts man that you get your kit from.
When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their original position before you started.
Note:
The little spring inside of the carburetor goes under the float arm.
That is where your fuel inlet needle/float valve is located...on the arm at the end.
Normally there is a small indention in the carburetor base and a small protrusion on the underneath of the float arm where the spring will be in the right postion for installation.
The spring will set in the indention and you will install the float arm with the needle/float valve and float rod into position over top of the spring,you will push down until it is in position and then you can tighten the screw that holds the float arm assembly in position.
Once you have your carburetor cleaned/rebuilt that should solve your problem.
Please take time to rate me
Bud

Posted on Apr 18, 2013

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  • 1 Answer

SOURCE: my CPI Hussar 125cc scooter starts but stalls as

cine i-mi poate spune *** se regleaza colbutorii la motor hussar 125?

Posted on Jul 13, 2010

afarri
  • 1386 Answers

SOURCE: 2003 Suzuki Katana 750 sat around for 2 years with

Hello and welcome to FixYa!

Yes there can be expired fuel on the bowl. You may want to clean it thoroughly as a first course of action. Please do check and replace the spark plugs and plug wires too for they can be worn out which may cause irregularities on current supply.

If the problem still persists, please do check the vacuum lines too. If you have disconnected or worn out vacuum hoses you'll have vacuum leakage. If that's the case, please have it replaced to resolve the issue. Wish you all the best on this and hope to get your bike back to it's normal running operation.

Hope this helps and thank you for using FixYa! Have a good one!

Posted on May 29, 2011

  • 339 Answers

SOURCE: scooter sat for a year;

after a year sitting idle chances are that the gas inside the carb has degraded and the carb will need cleaning also when you filled the tank did you remove any old fuel? if not the its contaminated with the old gas
give it a full service new feul clean carb clean air filter then it should start

hope this helps

john

Posted on Jul 01, 2011

  • 33 Answers

SOURCE: 2007 kymco agility 125cc scooter

could be one of a few things. Most likely fuel related. 1) carb blocked main jet (whip it out n clean it) 2) air filter clogged up or split (remove spark plug and if it is black there is too much fuel and either the airfilter is blocked up or the choke is stuck on, if it is very white there is too much air getting infrom either a split air filter or leaking inlet pipe) 3) change spark plug.

Posted on Jul 02, 2011

  • 159 Answers

SOURCE: 2010 Buell Blast starts but stalls after about 15 seconds

From the sounds of that I would say FIRST get a new battery!
The stalling problem sounds to me like the carb needs to be cleaned!

Posted on May 30, 2012

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