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Why would my Tao Tao 50all of a sudden just die and won't restart

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The most common things I have seen are fouled spark plug, bad gas, or bad battery. Give those a try first. If you still have trouble read on...

The way I start with diagnosing a Chinese scooter is with the acronym F.A.S.T. which stands for Fuel Air Spark Timing.
1. Fuel- is the fuel entering the combustion chamber? You will have to follow the path from where the fuel goes in, to where it comes out. The easiest place to start is by simply starting the scooter a few times, pull off the spark plug and see if the plug smells like gas or is wet. If you have a wet smelly spark plug, proceed to number 2. If it's dry, continue reading. One problem I have seen on low mileage scooters with a non-starting condition is debris from the factory that has clogged the carb. But before you start tearing apart the carb, look at the outside bottom of the fuel tank, there should be a fitting with 2 hoses coming out of it. One provides fuel to your carburetor, the other provides vacuum from the carburetor to the fuel diaphragm located at the bottom of the tank. Take the smaller and more supple of the two hoses off the carb. This is the vacuum line, make sure it's dry and not full of gas, and suck on it a little, do this several times and the diaphragm should start allowing fuel to the carburetor. For the more squeamish, get a syring for measuring oil from the auto parts store and use that to suck on the hose if you don't want you lips getting dirty. Give it a start, if the plug is still dry, pull off the fuel line from the carb and see if fuel is coming out. If fuel comes out, you might have carburetor issues, and that is another question in itself.
2. Air- Air leaks can cause all types of problems, start by making sure the boots from the carb to engine are snug and in place. If their is an air leak in the head or case, you will have to do some further research.
3.Spark- take the plug out, preferably in a space where it's dimmly lit so you can see a spark, in a pinch I have draped my jacket over my head and the engine and checked for spark on the side of the road. Now connect the plug to the plug cap and place it against the metal of the engine and you should see a spark. Nice bright blue. A weak white or no spark at all, start out by replacing the plug. If it still does not work, the most likely culprit is electrical shorts. If you suspect a short, start asking questions about scooter short, or kill switch short.
4.Timing- it is set and fixed on most scooters and it only gets out of whack when someone takes the stator plate off. Highly doubt this is a timing issue.

Posted on Jan 22, 2019

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Posted on Jan 02, 2017

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Have a Tao Tao Moped 49cc. Runs ok but when I accelerate it dies. What are options


Hi, Richard and the usual suspects are:
1. Idle port, transfer ports, slow air jet clogged.
2. Idle adjusting screw set too low.
3. Air fuel mixture adjustment too lean.
4. Pilot/slow fuel jet clogged.
5. Faulty accelerator pump.
6. Float level too low.
7. Float bowl contaminated old fuel, water, dirt, rust, etc.
8. Carburetor bowl vent line clogged/blocked/pinched.
9. Fuel line to carburetor kinked or pinched.
10. Fuel filter clogged.
11. Intake manifold leak.
12. The gas cap is not venting properly or fuel tank venting system blocked.
13. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
14. Needle and seat stuck closed in the float bowl.
15. Multi carburetors not in sync.
16. Faulty fuel pump.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
TaoTao 50cc scooter won run good Help please
Scooter dies when adding throttle It Is The Ride
http://www.family-motorsports.net/GY6-50cc-150cc.pdf
TaoTao 49cc Scooter Parts
TaoTao ATM50 A1 Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

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sounds like carb jets are plugged. would require a proper dissassembly and cleaning. Also could have an air leak, easily detected by spraying carb cleaner directly on the manifold joint areas while running. engine will die if leak present.

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My own Tao unit is dying as well. Servicing does not appear to be available. The only solution I have found is to buy the Delphi MyFi unit which appears to use an identical interface (see page 10: http://file.xm411.com/manuals/MyFiUserGuide411.pdf ). What a bummer!

Digitally,
(/\/\<erwin

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