The carb is operating “normally” at full throttle. In this case, the throttle plate is parallel to the length of the tube, allowing maximum air to flow through the carb. The air flow creates a nice vacuum in the venturi, and this vacuum draws in a metered amount of fuel through the jet.
If there is too much fuel mixed with the air, the engine “Runs rich” and either will not run, runs with a lot of smoke, runs poorly or, at the very least, wastes fuel. There is an adjustable plate across the tube called the throttle plate, which controls how much air can flow through the tube. One of these screws controls how much fuel flows into the venturi at full throttle.
how does a chainsaw carburetor work Related Question:
How does a chainsaw get fuel?
A gas-powered chain saw’s engine functions much like that of a car. Simply put, the piston that drives the gears and chain is powered by energy released by combustion. Fuel in the tank is mixed with air when it’s pulled into the carburetor where it’s then ignited by a spark from the spark plug.
How does a 2 cycle chainsaw engine work?
A two-stroke engine, as explained in How Two-stroke Engines Work, has no valves or cams and generates power on every rotation of the crankshaft (twice as often as a four-stroke engine). This feature of the two-stroke engine means that it can generate twice the power of a four-stroke engine of the same displacement.
Do electric chainsaws need bar oil?
Electric chain saws derive their power from an electric source, so they don’t need fuel to run. Most gas chain saws require a premixed gas-and-oil fuel to operate properly. Electric chain saws don’t require this added oil, but the bar and chain do need to be properly lubricated.
How does the choke work on a carburetor?
By restricting the flow of air into the throat of the carburetor, the choke valve reduces the pressure inside the throat, which causes a proportionally greater amount of fuel to be pushed from the main jet into the combustion chamber during cold-running operation.
How does a choke work on a 2 stroke engine?
A choke restricts the flow of air at the entrance of the carburetor. This creates a stronger vacuum which draws in less air but more gasoline to create a “rich” fuel which is easier to ignite when the engine is cold. When the engine warms up, less fuel is needed.
What happens if you put too much oil in your 2-stroke?
Excess oil can produce a smoky exhaust, oil leaking out of the muffler, and sometimes loss of power. While not ideal, these issues can be fixed by simply replacing the fuel in the tank with properly mixed fuel. But running a two-cycle engine with too little oil can actually destroy the unit.
Is a chainsaw 2-cycle or 4-cycle?
Chainsaw engines come as either 2-stroke or 4-stroke versions. Sometimes these are also referred to as 2-cycle and 4-cycle engines – it’s the same thing.
What happens when carburetor fails?
A failing carburetor directly affects your vehicle’s fuel efficiency, so you’ll find yourself spending your hard-earned cash at the gas pump more often. The improper fuel/air mixture can also cause avoidable engine damage.
Why does my carburetor keeps flooding?
The most common cause of flooding is dirt in the needle & seat. What happens often is you clean your carburetor, then start the engine. Dirt from a dirty gas tank, or in the fuel line rushes up and into the carburetor.
What will happen if the carburetor is not properly adjusted?
Depending on the make and model of the vehicle, different carburetors may have multiple, sometimes up to four, air fuel mixture adjustment screws. These screws are responsible for controlling the amount of fuel that enters the engine, and improper adjustment will result in decreased engine performance.
Can I use 10w30 for chainsaw bar oil?
As a matter of fact, you can actually use regular 10w30 motor oil on a chainsaw as one of the alternatives in case you don’t have bar and chain oil. That’s because 10w30 oil has enough thickness and viscosity that will allow it to withstand the friction that is happening whenever you are using a chainsaw.
Can you use 10w40 in a chainsaw?
You can but it’s not very good for the chain or the environment. The Husqvarna / Stihl stuff is much thicker and vegetable based so it doesn’t fling off the chain as easily or poison your garden! 10w30. Thicker.
How do you know if the choke is on or off?
The “choke” is off when the choke lever is down or when the choke lever is facing you if your choke is a handle bar mount. Choke off means that the choke plate is not covering the carb throat.
Should choke be on or off when starting?
When using the choke, this means that the entire amount of air entering an engine must pass through, therefore the choke must be closed during a cold start.
Does choke open or closed carburetor?
The choke is a plate in the carburetor that opens and closes to allow more or less air into the engine. Similar to the throttle, the choke plate rotates from a horizontal to vertical position to open up the passageway and allow