How Does A Carburetor Work? Engine Diagnostics 101 Go Kart Guru
Posted by cappetaJul 10
Trouble shooting engines can be very frustrating especially if you don’t know anything about carburetors. This course shows how the carburetor works. It shows you why it works and some of the other functions of a carb. Visit Go Kart Guru.com for more details.
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Thanks for a clear explanation. 5*’s
Brilliant.
Thanks for helping me to understand. Engines bewlider me.
thanks, the float carburetor was forever confusing me until you explained it, nice vid
love this video. very informative and well-worth watching
It’s spelt “Course”
Of coarse its spelled course, but it you are like me…you get them mixed up….thanx.
um….you can edit it…i mean your doing an explanation with paint you might as well spell correctly
haha when I first heard the baby I thought i had audio malware on my computer. I was pissed. Glad you mentioned it. LOL
I’m not an expert but I was always told that your engine actually runs hotter when you have a higher air to fuel mixture not the other way around.
Lean burn engines have the problem of heat. When you lean out the mixture the hotter it gets. It also works in conjunction with increasing the compression ratio. The limits in metalurgy limit how hot engines can get. The engines will literally melt. Lean burn engines can get really hot, so hot that the parts will melt in the engine, ie piston crowns, combustion chamber sealing surfaces, valve seats, valve stems, rings, cylinder walls, spark plugs, fueil injectors…
Why can’t engines run with the choke on when they are at operating temp? When the engine is cold, it needs more fuel but it also should need air. Why does the lack of air when cold, not affect it when hot? Does that make any sense?
Smoke is a by product of incomplete burning. It literally is excess carbon (the black soot) that is being released directly to the air, instead of combining with oxygen and making CO2.
The choked engine will not run well because it needs more air: fuel alone will not do the job.
In order for something to burn it needs the correct stochiometric ratio (meaning correct chemical combination of oxygen and the hyrdrocarbon chain).
You can dump more fuel in, but the resut wil be smoke.
When an engine is cold, all the metal components need to be heated up.
In effect the engine becomes more thermally efficient.
As the comment before was made, the fuel does not atomize well at cold temps. What this means is that most of the fuel is clinging to the walls of the intake and the cylinder walls engine and not being burnt, effectively leaning out the mixture.
In plain English, not all the fuel is getting into the engine and being burnt.
@gamblighini good info man, thanks
ey man simple video but very good chek my video of my idle problem, in your video said the fuel stak passajes my runs fine with low to up revs or circuits but cant hold the idle,im gonna try to clean it up like u said any tips before i clean it?how u clean it?remove jets and spray?or i have to spray every hole and specially that little drilled tube inside that mix the fuel with air etcetc?my engine was satdown for 1 1/2year if u want chek my video.hesitates toomuch i think.
Typically to clean a carburetor remove all screw in parts, such as jets. Then spray carburetor cleaner into every hole and port. Use a compressor to blow out the holes in the carb. Do this multiple times. You may want to use a small wire to verify the carb jets are clean. If clogged, use the wire to free them up. Some caustic cleaners may be require to dip the whole carb in. See your local parts store for details.
well let me tell u ,i cleaned the damn carb just the top and the middle part ,used cleaner inevery hole i found into the plunger and now is worst,i have a super lean ratio,cant hold idle and the pump valve or plunger is stuck or i dont know cause when i pull the throttle the plunger just move like 5mm,doesnt run the entire stroke and now im pissed,i did it the same way is not rocket sciens but i ll have to do it again,thx for the reply,i ll post everyvideo i can,stay in contact thx
i have one qeustion, you showed how the choke sends air into the “fuel tank” instead of “over the bump” so is there more umm.. “openinings” to the fuel source then just that one tube?
sorry for the other qeustion i posted, i had only watched half the video when i asked.
really good.. thank you!
Good video.. easy to understand.
really great video!!!!! i don’t need to waste much of my time to read and imagine how it actually works…now while reading i can imagine ur video!!!!!!! thanks!!!!!!
While the theory is, ehhh, okay. Carburetors really work on the Venturi Effect, the bumps just increase airspeed so you get more Venturi Effect. Venturi effect will happen whenever you have a stream of air over a another tube.
thank you now my scooter wont constantly drip fuel on my garage floor!
where can i adjust the olil olevel that enters the carburator?my bike drinks a lot of oil and my exahust is alll unnburned oil at the tip…i want 2 make less iol go in… srry 4 the bad english