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How to adjust carburetor mixture screws

Here's how to find and adjust the mixture screws on your carburetor. Note that metering-block style carbs such as Holley and Demon more often have one or 2 mixture screws in each metering block depending on the number of venturi. Also those may not be located at the bottom of the carb as in factory carburetors.


 


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How Motorcycle Carburetors work and how to tune and clean them
Here's a link to the kind of carb cleaner I like best (it IS the best) http://www.amazon.com/gp/product/B002ERT666/ref=as_li_qf_sp_asin_il_tl?ie=U TF8&camp=1789&creative=9325&creativeASIN=B002ERT666&linkCode=as2&tag=httpww wyou00f-20 How Motorcycle Carburetors work and how to tune and clean them Check out my other channel here http://www.youtube.com/watch?v=1KKvwMaIotA





Rochester Carburetor Trick!
If your Rochester Quadrajet or Dualjet Carburetor is Hesitating try this Trick!





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Set the timing by ear, and got the idle slowed down so I could do a little adjusting on the carb. I'll do more when it's cold, so I can set the choke and all. Love the way it's sounding..





Auto Repair & Maintenance : How to Adjust Carburetors
Idle speed and idle mixture are the two most common adjustments made to carburetors, and these adjustments start by warming up the vehicle to full engine-operating temperature. Find out how to perform a lean-drop adjustment with help from an ASE-certified master automobile technician in this free video on carburetors. Expert: Clark Mason Bio: Clark Mason is an ASE-certified master automobile technician. Filmmaker: Christian Munoz-Donoso





How a carburetor works, schemes and explanations
This video explains, not in too much detail, how a 28mm Walbro diaphragm carburetor works (using mainly schemes to point out what happens inside). It explains what occurs at the venturi, what the butterfly valve is for, how the needle doses the amount of fuel, and how does the diaphragm slide adjust itself.





Randy's Cycle Service Explains Carburetors, Choke & Cold Starting - vintage motorcycles @ rcycle.com
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Identifying Quadrajet vacuum ports
I always see a lot of questions about what various vacuum ports do on a Quadrajet. Here's a general guide that will point you in the right direction. Remember that there were many different Qjets over the years and vacuum port locations and number will vary. This video is representative of 1975-90 carbs. Enjoy!





How To Adjust Fuel And Float Level On Holley Carbs
Holley demonstrates how to properly adjust the fuel level and the float on Holley four-barrel carburetors.





How To Adjust The Accelerator Pump On Holley Carburetors
How-to adjust the accelerator pump on Holley carburetors to avoid stumbling and hesitation upon acceleration. Tips include: How to check for the clearance between the accelerator pump diaphragm arm & operating lever; how-to select the correct accelerator pump nozzle size, and accelerator pump cam selection and installation. Additional information can be found on Holley's website: http://forums.holley.com/entry.php?428-How-To-Cure-Carburetor-Stumble





Everything you wanted to know about automatic chokes but were afraid to ask
I've noticed many people drive vehicles with inoperative chokes. Even though chokes can be intimidating, repairing and adjusting them actually is very simple. So, stop pumping that accelerator and follow along as we look at how chokes work and how to repair them.





Two-Stroke Scooter / ATV Carburetor Settings And Adjustments 2of4 : Idle Speed & Mixture
Part 2 of a 4 part video detailing all of the basic settings and adjustments of the carburetors found on Minarelli / Jog / 1E40QMB powered 50-90cc scooters and youth ATVs. Part 2 shows how to adjust the idle speed and mixture settings. Please like the video if you found it to be helpful.





How to clean out the carb on a small engine
This happens to be a Craftsman 4.0hp engine, but this procedure is the same on most small engine carburetors





How To Find A Vacuum Leak - EricTheCarGuy
Vacuum leaks are one of the biggest causes of engine performance problems. This video is pretty straight forward in it's approach to finding a vacuum leak. On thing I might mention is that not all vacuum leaks are at the engine. Some HVAC systems run on engine vacuum and can cause a leak under the dash in some cases. I've even seen vacuum operated door locks. Just be sure to be careful spraying flammable stuff on a hot engine, you don't want to take one problem and make it a whole lot worse. You can also use a spray bottle with water to do this same test. It may not be as effective, but you don't have to worry about spraying a flammable substance on a hot engine. For more information on diagnosing engine performance issues, check out this article I wrote. http://www.ericthecarguy.com/faq/solving-automotive-performance-issues The best place for answers to your automotive questions: http://www.ericthecarguy.com Facebook: https://www.facebook.com/EricTheCarGuy?fref=ts Twitter: https://twitter.com/EricTheCarGuy Google+: https://plus.google.com/100195180196698058780/posts Information on Premium Membership: https://www.ericthecarguy.com/premium-content-streaming-etcg-content Stay Dirty ETCG Due to factors beyond the control of EricTheCarGuy, it cannot guarantee against unauthorized modifications of this information, or improper use of this information.  EricTheCarGuy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. EricTheCarGuy recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video.  Due to factors beyond the control of EricTheCarGuy, no information contained in this video shall create any express or implied warranty or guarantee of any particular result.  Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not EricTheCarGuy.





Vacuum Lines Connection
Footage taken from Holley Carburetor Installation & Tuning DVD





How To: Setting the Timing
How to set the timing on a 3 cyl Geo Metro engine, 1995 - 2001 models. Visit GeoMetroForum.com for more information on the repair of Geo Metros




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