How Chainsaw Carburetor Works - Epic Inside View!

An Enlightening Explanation of Fuel Flows through the 2-Stroke Carb FOR GREATER KNOWLEDGE
- So let's begin: A specific procedure is used in the operation of a 2-stroke carburetor to combine fuel and air to produce a combustible combination that powers the engine. Here is a step-by-step breakdown of a 2-stroke carburetor operation and fuel flow:
When the engine's intake stroke pulls air in, the process is said to have started. Air enters the carburetor through the air filter because it is necessary for combustion to occur.
Effect of the Venturi: The carburetor contains a small area known as the venturi. This confined space causes the air to move faster and create a low-pressure zone. Fuel must be drawn into the mixture via the Venturi effect.
Fuel Reservoir: A supply of liquid fuel, often petrol, is kept in the carburetor's float chamber or reservoir. A float and needle valve mechanism, akin to what you may see in a toilet tank, controls the fuel level in this chamber. The float valve opens as the fuel level falls to let in additional fuel.
Atomization: As explained before, the Venturi effect produces a vacuum that draws fuel from the reservoir. This fuel is atomized into tiny droplets after being pulled through a precise jet. A homogeneous and flammable air-fuel combination is produced when the fuel is atomized and combined with the fast air.
Adjustment Screws: To fine-tune the air-fuel combination, carburetors frequently feature adjustment screws. These screws regulate how much air and gasoline enter the engine. While the "low-speed" screw regulates the idle mixture, the "high-speed" screw often adjusts the mixture for maximum throttle.
Combustion Chamber: A passageway leading to the engine's combustion chamber is where the air-fuel combination leaves the carburetor. A reed valve may be installed in this tube to ensure that the mixture flows just in one direction and does not return to the carburetor.
Combustion and Ignition: The spark plug ignites the air-fuel mixture as soon as it enters the combustion chamber. The combination is ignited by the plug's spark, which causes a fast expansion of gases. The engine's piston is propelled by the high-pressure force produced by this expansion, which transforms chemical energy into mechanical labour.
Exhaust: The cycle repeats as the piston advances through its strokes because the exhaust gases leave the engine through the exhaust port after combustion.
In order to ensure that the proper proportion of air and fuel is created for combustion, the 2-stroke carburetor is crucial. To get the best engine performance and efficiency, proper calibration and maintenance are necessary. Using the carburetor's screws, the mixture's richness or leanness can be changed to meet various operating conditions and requirements.
This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle!
This is basically a shortened version of the How a Carburetor Works. Again, this is the STIHL ZAMA Grass Strimmer Carburettor. I though it would be a good idea to include this version as some people may want to get right to the point and not need to know as much detail as others may.
Many thanks
Craig Kirkman (Owner and Creator of The Repair Specialist Channel)
#CarburetorOperation
#2StrokeEngine
#FuelMixture
#EnginePerformance
#CarburetorTuning
#AirFuelMixture
#EngineEfficiency
#MechanicalEngineering
#InternalCombustion
#EngineMaintenance
#FuelAtomization
#VenturiEffect
#CombustionProcess
#FuelFlow
#CarburetorAdjustment
#MechanicalPrinciples
#SmallEngine
#MechanicalComponents
#EngineCycle
#2StrokeTechnology
The creation of information in this description was helped by ChatGPT

[@TheRepairSpecialist]

All Episodes -for 2-Stroke Carburetors Here. Thanks. Craig: kzbin.info/aero/PLrlXp3PlwgRI5OLvm3P91LJr1CYnO5TRD

[@neverarguewithan18wheeler10]

I love how you take the time to explain each detail in layman's terms showing and pointing to each piece in the carb. Keep up the good work I learned alot just from one video!

[@davesmithson730]

Seriously, one of the best & best presented videos explaining something that I’ve ever seen…

[@TheRepairSpecialist]

Thank you for your positive feedback. I really appreciate it. Thanks again. Craig

[@Conservative01]

This is 7 years later but, thanks for this video! Great explanation!

[@samuelhanekom9035]

You’re a amazing teacher thank you

[@TheRepairSpecialist]

You're very welcome! Thank you for your kind feedback. Craig

[@courtneyroy270]

Your show is great, like your good self thanks man.

[@TheRepairSpecialist]

I appreciate that. Thank you 👍👍👍

[@boblordylordyhowie]

Thank you, I could not get fuel to flow but after watching this, pausing along the way to check my carb. I found the problem.

[@BQTY]

This is legit an incredible video. Love the style and explanation. thanks

[@SCRUBDUBBDUB]

Ingenious... your theoretical explanations and diagrams make it so easy to understand... two thumbs up. thanks

[@JerryFults-tw4ig]

Very good ,informative,video anyone can understand. Thank you so much , I feel like I just graduated 2 stroke school

[@brainfeed6604]

BRILLIANT,What a bang on tutorial I have been waiting for some one who knows there stuff to show us how the carburetter really works,all other video`s are skipping the main importance to what should be known,other vids expect if your working on your carb then you must all ready understand the fundamentals the way the fuel and air travel`but this is not the case for thousands of people who need to repair there carburettors.Even if you just get one viewer repairing there carburettor you have made a whole impact on him or her as they will pass there knowledge on to hundreds down to there friends and families,keep them going it is very well appreciated,thank you.

[@channingburke7092]

Great video very helpful

[@TheRepairSpecialist]

Thank you 👍

[@jeruharlem]

Wow! thank you. If i could, i'd like this a million times

[@AliAhmadi-hq9pj]

Thanks for wonderful video

[@gillpavon4967]

Thank you for posting.

[@J-unit84]

Good video man. Very well explained. Ty

[@TheRepairSpecialist]

Thank you for your nice feedback I really appreciate it. Craig 👍

[@lawlessize]

Excellent presentation with graphics.

[@TheRepairSpecialist]

Thank you so much for your nice feedback. It's comments like yours that motivate me to continue making these videos. Craig 😀👍

[@CitizenOFskroz]

Thank you for great explanation! There is one more passage (carb on video is very similar to mine) that connects suction of pump before flap to the area before filter (1:32 on video). What is its purpose?

[@Justin-kl7ec]

Excellent v well put together, and well explained

[@TheRepairSpecialist]

Thank you kindly!

[@andrewedds4386]

This is a damn good, simple explaination of a simple carburetor. Great video.

[@iggytate]

Thanks for that - great clear video! But what about the other fuel pipe what's that for and what is it's route?

[@rteaw]

aaa thats why it overflows with fuel.. a bad spring and it never close

[@geojor]

is the main jet and the high port the same thing ? thanks...

[@neiltaylor4019]

Hi, when the fuel goes down the three holes into the carburettor is there a rubber inside the main jet and if so would carb cleaner destroy this thanks.

[@vaninec]

so if i priming carb fuel should spray inside of carburetor?

[@josepeixoto3384]

You say "fuel is drawn in"... how is it drawn in? what is the "fuel pump"?