Your question: Why does the carburetor on a scooter overflow?


Sometimes, having arrived at the store on his motorcycle or simply left it on the street for half an hour, upon returning the owner notices a puddle of gasoline under his faithful horse. Besides the obvious loss of gasoline, this problem can turn into a serious problem if a passer-by carelessly throws a cigarette butt in the direction of your motorcycle. In a car equipped with a carburetor engine, a gasoline leak is especially dangerous, since it is not so easy to notice, and a sudden fire under the hood can occur.

Signs that adjustment is needed

Based on certain signs that appear in abnormal engine operation, we can conclude that the carburetor needs adjustment.

The list of deviations is quite wide:

  • the power plant does not develop the required power under load;
  • when the scooter accelerates sharply, failures in engine operation are felt;
  • a cold engine is difficult to start with the starter after a long period of parking;
  • the scooter's power unit consumes fuel in increased quantities;
  • there is no quick response of the engine to a sharp turn of the accelerator handle;
  • The engine may suddenly stop due to insufficient fuel mixture.


The carburetor should be adjusted if there are signs that adjustment is necessary.

If one or more of these symptoms is present, you should adjust the carburetor, and then diagnose its condition and check the operation of the engine.

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Repair it yourself or send it to a service center

Most of the malfunctions of gasoline chain saws can be fixed with your own hands. True, this requires an understanding of the structure of the chainsaw and how the components function among themselves. As for the tools, the most often needed are:

  • screwdrivers (slotted and power);
  • combination wrench included in the kit or regular wrenches with heads of various sizes.

It is worth understanding that not every problem can be solved on your own. Not every chainsaw owner has a compression gauge at home or a special device that allows you to create a vacuum and the required pressure, for example, to check the crankcase for leaks. In this case, you simply cannot avoid contacting specialized specialists.

Quite often, such a malfunction as leaking gasoline is observed in a Chinese chainsaw with a volume of 38 cubic meters.

Gasoline pump

If the fuel pump operates with increased productivity, then more fuel is supplied to the carburetor float chamber than necessary - it is forced through the pressure. This problem is especially relevant for cars whose carburetors are not equipped with a so-called return line for dumping excess fuel. This is true for electrical and mechanical units.

In a mechanical fuel pump, the valves, diaphragm and return spring are checked. Faulty elements are replaced with new ones - repair kits are available for sale.

Scooter rider

A scooter can have many breakdowns and malfunctions and they always arrive at the wrong time. One of these breakdowns is when the carburetor on a scooter floods. In this article we will look at the following questions: – Why the carburetor on a scooter floods – Symptoms of a carburetor on a scooter flooding – How to fix this problem

Symptoms of a flooded carburetor on a scooter

If the carburetor is flooded , this can be determined in simple ways. The manufacturer of your vehicle is of great importance. Because Japanese scooters are very different from Chinese ones. In our case, the main symptom that the carburetor is flooded in a scooter is a wet spark plug. If the scooter stalls, jerks, or does not work confidently, you need to check the spark plug. If you have a Chinese scooter , then in addition to a wet spark plug, you may find that gasoline is leaking from the air filter.

First you need to check that the valve clearances are set correctly. If everything is fine with this, then we are looking for what could be wrong.

Idle settings are off

Often, manufacturers of scooters, motorcycles and other inexpensive equipment recommend that owners independently adjust the carburetor by adjusting it with the idle speed screw.

As a result of the screw being fully tightened, the carburetor ejects fuel and it flows into the air filter.

Adjusting the carburetor will completely eliminate the problem.

Lack of air causes operation on a rich mixture, which leads to unstable engine speed. This malfunction can also be diagnosed by the condition of the spark plugs.

Gasoline Gets into the Air Filter, Why Gasoline Leaks and Throws on Scooters, Mopeds and Motorcycles

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