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Small Engine Repair: Checking Fuel Pump Diaphragm & Inlet Needle on a Diaphragm Carburetor

Visit http://www.thesmallengineshop.net **Always follow the instructions in your repair manual when doing repair or maintenance work on Outdoor Power Equipment. Manuals can be found at the manufacturers website.** In this video I show how to check the fuel pump diaphragm and inlet needle for leaks on a diaphragm carburetor. A diaphragm carburetor is used on hand held power equipment, and are popular because they will work in any position. All chainsaws, trimmers and blowers that I have seen use a diaphragm carburetor. To check the fuel pump and inlet needle, pressurize the carburetor to 10 psi through the fuel inlet. The carburetor should hold the pressure fairly steady, and if it doesn't than there is a leak around the fuel pump diaphragm or inlet needle. You can pin point the leak by dunking the carburetor in water while it is pressurized. If the leak is around the fuel pump diaphragm, than either the fuel pump diaphragm, fuel pump diaphragm cover or the body of the carburetor is at fault. If the leak is coming out of the venturi, than the inlet needle or seat is faulty. Tools used: - 3/8" wrench to remove carburetor - Mityvac to pressurize the carburetor - Needle Nose plyers Specifications: - Carburetor should be pressurized to 10psi through the fuel inlet. Never exceed 10psi. Its important to run fuel through the carburetor before testing. A wet carburetor will hold the pressure better than a dry one.


 


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Small Engine Repair: Cleaning Carbon Buildup on the Exhaust Port & Muffler on a 2 Stroke Engine
Visit http://www.thesmallengineshop.net **Always follow the instructions in your repair manual when doing repair or maintenance work on Outdoor Power Equipment. Manuals can be found at the manufacturers website.** Small engines used in outdoor power equipment often suffer from carbon build up in the cylinder head, Exhaust port and muffler. The is more common in 2 stroke engines than 4, but it does occur in both. In this video I inspect the Exhaust port and muffler on a Echo SRM-230 trimmer. The muffler was very clean, but the Exhaust port had carbon build up that blocked half the port. To clean the port, rotate the engine until the piston skirt is covering the Exhaust port, and take a screw driver and lightly scrape the port to remove the carbon. Than take compressed air and blow out the port to remove the carbon pieces. Mufflers on small engines are usually sealed units, so cleaning them is very difficult if not impossible. Its easy and less expensive to replace a sealed muffler with a new one. Some mufflers have screens, which can be cleaned with a wire brush and compressed air. This trimmer was run by the previous owner without a trimmer line knife attached to the deflector. This allows the trimmer line to extend beyond the manufacturers recommended length, and this causes a excessive load on the engine. I believe this is primary responsible for the carbon build up on the port.





Walbro Carburator How does the Fuel-Pump work
The Walbro Carburator has a fuel pump that work nomatter what direction you keep it in. It will work upside-down too. The ordinary float-chamber carburator will not. How the Walbro Throttle and valve work; http://www.youtube.com/watch?v=9-xgVEvUxuM





How to diagnose carburetor vacuum leaks on your motorcycle
This is a simple video demonstrating the best method to detect vacuum leaks around your carb boots. Vacuum leaks are a fairly common problem in older bikes, and luckily they can usually be remedied quickly and easily, the first step however is diagnosis. If your bike is running rough, won't rev up or has an irregular idle, before you take off the carbs and open them up, check for vacuum leaks. A vacuum leak occurs when too much air is introduced into the combustion chamber via a failure in one or more of the carburetor boots or other rubber mating surface. When too much air is sucked in, then the bike cannot combust the gasoline efficiently; there must be an optimal ratio. Therefore it is up to you to detect these leaks, and either plug them up or replace the carb boots. In this particular bike, the engine was running VERY lean. Not only did we have vacuum leaks, but the baffles were taken out of the engine, and the previous owner had removed the air filter and neglected to install a new one. This is not only dangerous by allowing foreign material to enter the engine, but it also makes the engine run much hotter, as lean explosions create more heat than regular ones (think about blowing on a fire in your fire place: more air, hotter fire). This can be detrimental to a variety of parts in the engine, and it is a good thing we didn't ride this bike around too much before finding the problem. If anyone has any questions as to why this is important or how to find/repair these leaks, leave a comment and I will respond. Thank you





How To Fix Any Small Engine Tips
in this video i will be showing you guys some tips for fixing any small engine





Small Engine Repair: Inspecting the Drive System on a Scotts Self Propelled Walk Behind Lawn Mower
Visit http://www.thesmallengineshop.net **Always follow the instructions in your repair manual when doing repair or maintenance work on Outdoor Power Equipment. Manuals can be found at the manufacturers website.** In this video I inspect the drive system on a Scotts self propelled walk behind lawn mower. Scotts does not manufacture their mowers, and the mower shown in the video is actually manufactured by Murray. Scotts also has John Deere manufacture mowers under the Scotts label. The self propelled wheels on this mower are actually plastic ring gears with tire tread, and the most common problem you will find with this type of system is the metal axle gear has a tendency to wear down the plastic ring gear, and cause the two gears to slip. It is an easy fix, and each wheel only requires removal of one nut and washer to remove the worn wheel and replace it with a new ones.





Carburetor Adjustment Basics -EricTheCarGuy
In a way this is 'Part 3' of my carburetor series. In case you missed them, here's parts 1&2. Carburetor Rebuild Basics (Part 1): https://www.youtube.com/watch?v=85nszLpbbXY Carburetor Rebuild Basics (Part 2): https://www.youtube.com/watch?v=dprLQcQrAqE If you want to see the full version of the carburetor rebuild video with additional footage now, become a Premium Member of EricTheCarGuy.com: http://www.ericthecarguy.com/premium-content-streaming-etcg-content One of the most important parts of a carburetor rebuild is setting it up properly after you're done. There are also many times where a rebuild may not be necessary and you just need to perform some of these adjustments. Either way, I hope this video will help you should you need to adjust your carburetor. Tools. Vacuum Gauge: http://www.jbtoolsales.com/equus-3620-vacuum-gauge-fuel-pump-tester/#oid=10 02_1 Related videos. Finding Vacuum Leaks: https://www.youtube.com/watch?v=9CPqbaSgcok How To Check For Timing Chain Slack: https://www.youtube.com/watch?v=4_f5ukZVri8 Service Manuals: http://www.youtube.com/watch?v=IN95GLDvGBc Fairmont Drag Strip: https://www.youtube.com/watch?v=hkOdD0P38ps Cleaning Throttle Bodies: https://www.youtube.com/watch?v=41yFXjibtLY Solving Performance Problems 1: http://www.youtube.com/watch?v=rsGTeWayqIU Solving Performance Problems 2: http://www.youtube.com/watch?v=sAKwCzUE_9M Re Performance Problems: http://www.youtube.com/watch?v=_vAJi5rLMGY Related articles. Idle issues: http://www.ericthecarguy.com/faq/solving-automotive-idle-problems Performance issues: http://www.ericthecarguy.com/faq/solving-automotive-performance-issues Getting Better MPG: http://ericthecarguy.com/faq/finding-and-fixing-the-causes-of-poor-mpg Discussion about this Video: http://www.ericthecarguy.com/kunena/18-The-EricTheCarGuy-Video-Forum/52785- carburetor-adjustment-basics#107280 The best place for answers to your automotive questions: http://www.ericthecarguy.com ETCG FAQ Page: http://www.ericthecarguy.com/faq EricTheCarGuy code lookup: http://www.ericthecarguy.com/obd-code-lookup Facebook: https://www.facebook.com/EricTheCarGuy?fref=ts Twitter: https://twitter.com/EricTheCarGuy Google+: https://plus.google.com/100195180196698058780/posts Information on Premium Membership: http://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.





NEVER OVER FILL YOUR OIL !!
Ever wonder what happens if you overfill your oil





Motorcycle Repair: Inspecting and Adjusting the Motorcycle Chain and Sprocket
Visit http://www.thesmallengineshop.net **Always follow the instructions in your repair manual when doing repair or maintenance work on a motorcycle. Manuals can be found at the dealer and online.** This video gives a general overview about how to inspect a motorcycle chain and sprocket. The information I give is a general rule of thumb, so the specifications for your motorcycle could be different. Its important to always look in a repair manual for your motorcycle for the correct specifications.





Carburetor Rebuild Basics (Part 1) -EricTheCarGuy
Carburetor Rebuild Basics covers the basics of rebuilding a carburetor. Now there are a LOT of different carburetors out there so this video won't apply to all of them, but it will give you a general idea of what you would be in for if you decided to rebuild one. Me, I like rebuilding carburetors. There's something about mechanical things like carburetors that interest me. How even the smallest part has a big effect on the overall operation of your engine. Since we've gone to fuel injection carburetors have become somewhat obsolete. I'm still a fan though. I may be a little rusty on this stuff since I haven't done this in some time but I hope this video helps you just the same. If nothing else, I hope you're entertained by it. Camera: Brian Kast The best place for answers to your automotive questions: http://www.ericthecarguy.com Related videos. Carburetor Rebuild Basics (Part 2): https://www.youtube.com/watch?v=dprLQcQrAqE If you want to see the full version of this video with additional footage now, become a Premium Member of EricTheCarGuy.com: http://www.ericthecarguy.com/premium-content-streaming-etcg-content The Basics of Carburetor Adjustment: To be added August 8, 2014 Cleaning Throttle Bodies: https://www.youtube.com/watch?v=41yFXjibtLY Solving Performance Problems 1: http://www.youtube.com/watch?v=rsGTeWayqIU Solving Performance Problems 2: http://www.youtube.com/watch?v=sAKwCzUE_9M Re Performance Problems: http://www.youtube.com/watch?v=_vAJi5rLMGY Related articles. Idle issues: http://www.ericthecarguy.com/faq/solving-automotive-idle-problems Performance issues: http://www.ericthecarguy.com/faq/solving-automotive-performance-issues Getting Better MPG: http://ericthecarguy.com/faq/finding-and-fixing-the-causes-of-poor-mpg Discussion about this Video: http://www.ericthecarguy.com/kunena/18-The-EricTheCarGuy-Video-Forum/52544- carburetor-rebuild-basics The best place for answers to your automotive questions: http://www.ericthecarguy.com ETCG FAQ Page: http://www.ericthecarguy.com/faq EricTheCarGuy code lookup: http://www.ericthecarguy.com/obd-code-lookup Facebook: https://www.facebook.com/EricTheCarGuy?fref=ts Twitter: https://twitter.com/EricTheCarGuy Google+: https://plus.google.com/100195180196698058780/posts Information on Premium Membership: http://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.





Easy Carb Diaphragm Fix
'74 Honda CV Diaphragm fix.





Small Engine Repair: Checking a Vacuum Fuel Pump / Fuel System on a Kohler V-Twin Engine
Visit http://www.thesmallengineshop.net **Always follow the instructions in your repair manual when doing repair or maintenance work on Outdoor Power Equipment. Manuals can be found at the manufacturers website.* Checking the fuel system, and vacuum fuel pump on a V-twin 25HP Kohler engine involves checking the fuel lines that attach to the pump, and checking fuel flow. The first step is to check to make sure fuel can flow from the gas tank to the fuel pump. To do this, disconnect the fuel line from the vacuum inlet fitting on the vacuum pump. Take the fuel line and lower it to a point that is below the fuel tank and see if gravity will cause fuel to flow from the tank through the line. If fuel flows, than the line is clear. If fuel will not flow, than check the fuel filter to see if it is restricted. Also check the fuel tank shut off valve if the tank is equipped with one. The valve may be in the off position, or dirty and restricted. Check the fuel tank cap to see if the vent on the fuel tank cap is plugged. If the fuel tank cap vent is plugged than fuel will not flow out of the fuel tank. Next, check the pulse line on the vacuum pump. Make sure it is connected correctly to both the vacuum pump and the engine crankcase. Also, make sure the engine is not overfilled with oil and the pulse line is not filled with oil. If the engine oil is overfilled with oil, than oil can make its way into the pulse line and block the pressure necessary to operate the fuel pump. The next thing to check is the fuel line from the vacuum pump to the carburetor. To do this, take the line off and make sure the line is in good condition, and there are no restrictions in the line. The final check is to make sure the vacuum pump is pumping fuel. Disconnect the vacuum pump outlet line where it connects to the carburetor inlet, and turn the engine over. If fuel flows from the vacuum fuel pump, than the pump is working. Kohler does not provide a more precise way of checking the vacuum fuel pump, and they say if you get fuel flowing through the pump when the engine is turned over, than the fuel pump is working correctly. Kohler does say the vacuum fuel pump should pump a minimum of 2 gallons of fuel per hour with a pressure at 0.3 psi and a fuel lift of 24 in, but they do not give you a method to check these specifications.





NAPA Service Tools Cylinder Leak Down Tester
Designed To Measure The Ability Of An Engine Cylinder To Hold Compressed Air Using Shop Air Pressure & Supplements Compression Tester, Pinpoint Bad Valves, Worn Rings, Cracked Cylinder Walls, Blown Head Gasket; Furnished w/ Rubber Boots To Protect Gauges, Includes Precision Regulator w/ Combination Adapters, 26" Hose Assembly, 2 1/4" Special Gauge Has Multi-Colored Band For Measuring Low, Moderate & High Leakage; Scale Range Up To 100%, Second Gauge Has Dual Scale w/ Ranges Up To 100 psi & Up To 7 Bar, Allows Technician To Monitor Input Airline Pressure NAPA part number: SER CLT-2





Small Engine Repair: Adjusting the low speed carburetor circuit on a Ryobi Blower
Visit http://www.thesmallengineshop.net **Always follow the instructions in your repair manual when doing repair or maintenance work on Outdoor Power Equipment. Manuals can be found at the manufacturers website.** This video is about adjusting the low speed carburetor circuit on a Ryobi Blower. On this particular blower the low speed carburetor circuit was adjusted to lean, so the blower would stall when you tried to accelerate the blower from idle to full rpm. The low and high speed adjusting screws on this Ryobi blower use adjusting screws commonly referred to as pac-man screws. Adjusting tools can be found on ebay. Tools Used: - Pac-man tool driver





How to fix your 2 or 4 stroke small engine
A basic check list on how to fix your 2 or 4 stroke engine. This tutorial or more based on the 2 strokes but works on 4 strokes as well. So if you werent quick enough in the video the checklist is. Fuel Spark Fuel supply (Lines, then carb) Muffler How to clean a carburetor: http://www.youtube.com/watch?v=UB1V6tsv8rg&feature=channel How to clean an air filter: http://www.youtube.com/watch?v=oCYAIJyby6k





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 hey... awesome video..nicely explained ! just one question. Please do tel me wts AIR NEEDLE and LOW JET used for again. ? i mean how and what do they work? thanx :) Reply · The air needle is like a transitional restriction to increase vacuum pressure and tapered to prime the main jet flow gradually to ramp up fuel flow from the idle/low circuit to the main circuit. Think of the circuits like gears or stairs. The needle covers transition between 3rd gear to about 5th gear on a six speed. It overlaps basically. Fuel is getting by it from the idle/low- on through to where it's completely out of the way of the main jet and the main jet fuel flow is roaring like the straw/compressor example. Without the needle the carb would work, but not as smoothly through middle throttle (where most people ride and have the most fine input or throttle roll back and forth. The low jet is like second gear on a transmission. You can shift from 1st to 3rd, but again you risk stalling and it won't be as smooth. Also there isn't really the mechanical inertia to carry the process on like you have with a rolling vehicle with a flywheel on the engine and the wheels turning. The pistons still create vacuum every other time they go down, but air just doesn't have the punch that steel does when in motion. The circuits in a carburetor have to be there or you would have a limit on RPM range. An idle jet can't deliver enough fuel to really scream, and the main jet couldn't go slow and would be VERY hard to start because the engine would have to be spun up really fast. So you have usually four or five circuits (I want to say jets, but their physically different) that get air flow like stairs as the throttle opens. They are typically 1. Starting circuit (choke on) 2. Idle circuit 3. low jet 4. Jet Needle 5. Main jet. How Motorcycle Carburetors work and how to tune and clean them Check out my other channel here http://www.youtube.com/watch?v=1KKvwMaIotA





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