| One of the most common questions we get is the overwhelming smell of gas from the carburetor or fuel leaking or overflowing from the cup. Both conditions are usually caused by a blocked or worn float valve. Another common cause is the use of fuels containing ethanol.
There are several factors that can cause a carburetor to leak gas. Another cause of gas leaks is a stuck float in the carburetor bowl. This pushes the gas out of the sides of the bowl. If gasoline leaks down the throat of the carburetor, the problem is most likely with a ball valve in the carburetor.
Back to the basics. If it is necessary to add gasoline to the carburetor, there is a problem with the fuel supply. If there are obstacles in or in front of carbohydrates, you will be hungry for fuel. Check all fuel lines, fuel filters, and the exhaust itself for a problem.
If gasoline squirts from the carburetor, it is a timing issue. This timing issue could be excessive timing, too low timing, or most likely connecting cables at the wrong time, causing them to trigger at the wrong time.
Carbohydrate setback (saliva or cough) typically occurs in the morning when an air / fuel carb mix is a little too lean. Coughing or saliva, like breakdowns, can also be the result of a poor ignition system, such as a crossfire sending a spark to a cylinder when the intake valve is open.
Check the air filter - the most common reason an engine accelerates is a dirty or inefficient air / fuel mixture. Clean the air filter and see if the problem goes away. Check Carbohydrates: If your scooter is new, the carburetor needle may need to be adjusted.
A flooded carburetor is another symptom of the carburetor float. The float is locked in the open position to allow fuel to flow freely into the tank and then into the intake manifold.
Symptoms of a bad or failing carburetor
The air-fuel mixture is too lean
An fuel-injected engine can snap back if there is a fuel leak (engine drain) or if a fuel-injected component, such as the fuel injector, occurs. B. an air flow meter is defective. Poor or erratic engine running time often causes intake kickback, but can also be responsible for exhaust fires.
Acceleration of misfire occurs when ignition occurs in the intake or exhaust and not in the combustion chamber. Bounce on acceleration can also be caused by internal carburetor problems, low compression, fuel tank leaks, poor engine condition, and weak or broken valve springs.
Modern engines can still bounce and poor fuel ratio is a common cause. The spark in the chamber cannot burn all the fuel, so a little extra gasoline vapor can enter the exhaust and cause a misfire.
Flashbacks are very harmful. There are many more sensitive sensors and parts in the entrance, and rollback is much more damaging. the afterburner is not that bad. If you get too rich, your cat will eat fire or not.
It is normal for it to idle at idle. This is almost always due to the idle screw on the primers being screwed too high, exposing the vacuum supply port and allowing the vacuum to enter before the fuel from the fuel pump reaches the cylinder (too little recoil and too much advanced).
Ignition misfire is usually caused by an air-fuel mixture that is too lean, which means that the mixture contains too much oxygen. Check first if the mixture screw (s) on the carburetor are properly adjusted. Most carburetors installed on the 350 use a single air / fuel mixture screw, while some carburetors use two.
If your snowthrower is in reverse, one of three reasons could be the cause. The first is too tight. The second problem could be incorrect timing (it could be over the valve or spark) and the third problem that could cause a misfire is that the inlet valve is not installed properly.
On a two-stroke lifter, this usually prevents it from sounding more like an umph than a ■■■■. Exhaust misfires are usually the result of the engine failing to ignite the fuel / air mixture for several revolutions. The air / fuel mixture flows and fills the exhaust system with a combustible mixture.