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Briggs & Stratton Lawn Mower Carburetors

Briggs & Stratton Lawnmower Carburetors

Small engine repair can sometimes involve replacing a lawnmowers carburetor. You might also need to locate spare parts, such as spark plugs, or repair kits used to repair problems with a carburetor. You can find the right carburetor for your Briggs & Stratton lawnmower and learn more about it here.

What does a carburetor do?

Carburetors are critical parts of a gasoline engine that create a mixture of air and vaporized fuel that is then delivered to the engine’s combustion chambers. It does this by controlling the amount of air that passes through the engine as fuel is aerosolized from a fuel pump feed. The air-to-fuel ratio is usually controlled with two valves called the choke and the throttle. The choke controls how much air can enter the carburetor, and the throttle controls how much air-fuel mixture can enter the engine.

What types of carburetor parts are available?

Sometimes carburetors need to be rebuilt, a process that involves replacing seals and parts like the choke and throttle, or the spark plug. This can be less expensive than replacing the entire unit, but it does involve more labor. Below is a list of some parts you might need to recondition or repair in a carburetor for your Briggs & Stratton lawnmower.

  • Float valves: Float valves usually come with a matching needle seal. These parts help regulate the inlet of fuel into the carburetor.
  • Jets: Jets are the nozzles that spray fuel into the carburetors neck, where it mixes with air.
  • Gaskets, O-rings, and seals: You can replace individual gaskets and other seals that have worn out with these items.
  • Fuel solenoids: These parts open and close the main fuel valve on a carburetor when the engine is turned on and off.
  • Overhaul and repair kits: Many carburetor manufacturers provide kits containing all the seals and parts that typically wear out and need replacing.
What are some symptoms of a faulty carburetor?

Carburetors can be temperamental as their moving parts, such as spark plugs, in the engine wear out and cause intermittent problems. Below is a list of some of the symptoms that can be caused by a faulty carburetor.

  • Poor engine performance: When the fuel-air mixture is not optimal, it will impact the performance of an engine. If you notice the engine doesnt have the power it should, the carburetor may need a tune-up.
  • Black smoke: If you see black smoke coming out of the exhaust continuously, this is a sign that the carburetor is delivering too rich of a fuel mixture to the engine. This causes fuel to be wasted.
  • Backfiring: When the air-fuel mixture in the engine doesnt have enough fuel in it, this can cause backfires and overheating when the combustion chambers ignite fuel in the intake or exhaust manifold.
  • Hard starts: If the carburetor doesnt deliver the right fuel mixture when starting an engine, it can make starting difficult.
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