Rotate the screw labeled 'L' clockwise using a flat-head screwdriver until the end. Also, if you have a tachometer, adjusting the carburetor on a Poulan saw will be significantly simpler. How do you adjust the fuel and air mixture on a Poulan Pro chainsaw? Closing the low and high-speed jets, Step 6. It will not take more than a few minutes. Poulan P3816 Chainsaw User Manual. Follow the same manner of the low-speed adjustment for this operation. Your Frigidaire appliance has a model number tag affixed to it at the factory. Problems 17 The chain must not move at the factory. Fix #1: Clean the Carburetor. If the adjustment is too rich, the desired RPM level cant be achieved. I've done everything short of a kit (I've cleaned it out thoroughly, but re-installed everything), and I just want to make sure this isn't a setting issue. When you enable the low adjustment by releasing the throttle trigger, the engine will die. The carburetor is set correctly at the factory, but adjustments can be necessary if the engine runs poorly, dies or runs at a high speed. Do this by turning the jets in a clockwise manner until you can't rotate them anymore. Nope no special procedure. Adjusting the carburetor of a Poulan chainsaw can be done by just about anyone. NOTE: NEVER SET YOUR CHAINSAWS ENGINE TO OPERATE BEYOND THAT OF THE MANUFACTURES SPECIFICATIONS. Thread starter Billy Jack; Start date Mar 29, 2010; Help Support Arborist Forum: Billy Jack ArboristSite Guru. For user convenience, the high-speed jet screws are alternated with the fixed jets in a few models. Thanks to all! To adjust the carburetor on Poulan chainsaws, clean the air filter and the spark arrestor, and adjust the adjustment screws marked T, L and H to set the idle and engine speed. If the chainsaw is accelerating slowly, its suffering from an insufficient fuel issue. This fits your . However, this should not be done. Similarly, adjust the high-speed jet (marked H on carburetor) to the desired point. Keihin Fcr 39 Manual Pdf WordPress com. Next, make sure to consider your safety. Genuine OEM Husqvarna Brand. Here are the easy steps to understand both adjustments. and position chain saw so that any sharp. Step 3: Make sure you have about half a tank of fuel. The carburetor is set correctly at the factory, but adjustments can be necessary if .. Carb looks clean from outside but didn't dis assemble it or make any adjustments. If it pumps properly, choke it and try to start it. How to Adjust the Carburetor on an Eager Beaver Chainsaw, McCulloch 160 Chainsaw Carburetor Specifications, How to Adjust the LA Setting on a Stihl Chainsaw, Poulan: Poulan 115327926 Chan Saw User Manual, University of Missouri Extension: Operating a Chain Saw Safely, Beautiful houseplants that also repel mosquitoes, cockroaches and other pests. You may want to be aware of the following: Once all are set correctly, you can now proceed with the steps to modify your Poulan chainsaws carburetor. Youve achieved the proper fuel mixture. If required, replace the filter. So, all other parts must be properly functioning before making any carburetor adjustment. Adjustments need to be made to a carburetor when it dies after starting, is hard to start or dies under a load. At idle conditions, the adjustment should generate around 2800 3400 RPMs. It runs and cuts great has brand new blade on it and brand new carb and air filter. The consent submitted will only be used for data processing originating from this website. Almost every chainsaw comes with three adjustment screws. If you turn the screw counterclockwise, itll decrease both the fuel mixture and idle speed. I bought a Poulan chainsaw new when I moved to Florida in 2002. . The too-rich adjustment will cause the engine to load up and die at idle speed. To begin, adjust the idle speed. Now slowly turn in the screw to a position where it idles the best. Need factory settings for carburetor.. Apr 18, 2012 Start by locating the three adjustment screws. . The carburetor has been carefully set at the factory. Do this by turning the jets in a clockwise manner until you cant rotate them anymore. For those unfamiliar with H and L screws, these are high-speed and low-speed adjustable jets for the carburetor function. ), link to Stihl 194t vs 201t - Everything About Their Comparison, Echo vs Husqvarna Chainsaw- A-Z Differences, https://www.youtube.com/watch?v=Cl8EICn1alM, poulan 2550 woodmaster chainsaw carburetor adjustment (https://www.youtube.com/watch?v=Cl8EICn1alM), Stihl 194t vs 201t Everything About Their Comparison, How Often to Sharpen Chainsaws Dont Overdo It. Determine the low-speed jet (marked L on carburetor) and high-speed jet (marked H on carburetor) at first. or Best Offer. JavaScript is disabled. Yep a 40" tree, a hot day, maybe dull chain with a 40cc saw could be enough to smoke it. chainsaw bars. I help my friends and neighbors with their tools. If you set the idle adjustment too low, the chainsaw will stop by itself slowly. An example of data being processed may be a unique identifier stored in a cookie. If there's a blockage in the carburetor, try cleaning it using a carburetor cleaner. Don't touch the High screw anymore. The high end is when the chainsaws engine speed is topped out. I understand the need to promote your own certified dealers, but not for carburetor settings. All you need is a tachometer. Back off (turn CCW) screw about 1 turns. Most importantly, you must wear safety gear like leather gloves, long pants or reliable chainsaw chaps, safety glasses, long-sleeved tops, and closed-toe shoes to avoid injury as you work with your saw. So we highly suggest cleaning the carburetor to prevent clogs. The perfect one-screw idle adjustment can be found between the lean or rich points. PLEASE REFER TO YOUR OWNER MANUAL FOR THE CORRECT RPMS. why did you take teh carb apart,,, what were teh problems? This is achieved by setting the low speed (marked L on carburetor) and high-speed (marked H on carburetor) jets open 1.5 turns from completely closed. Over time, the spark arrestor can become clogged with soot. . in/out until engine runs smooth. If your chainsaw stops working when the saws throttle is active, the gas mixtures bottom end is excessively rich. Stihl 194t and 201t- the two most popular and reliable chainsaw models are hard to compare. When it comes to sharpening, an electric sharpener is absolutely the best choice. But youll need to use a special tool (tachometer) to get the job done efficiently. 1 1/4 -1 1/2 out on both should get it started tehn adjust it from there,, i have a cut bs filter in mine also,,, easy and cheap,, been in there 2 years no problems,,. With that information and suggestions, you can do really good professional work in a very short time. The ideal carburetor settings for the Poulan chainsaw are pretty straightforward. I help my friends and neighbors with their tools. With an experience of 11 years in this field, I can suggest the best tips for bigger DIYers. Next, adjust the saws low jet to the position where the saw chain stops moving while its throttle is still responsive. The Real Answer, How to Best Store a Chainsaw? If the Poulan chainsaw engine runs sluggish, changing the amount of fuel is mandatory. Drive system. Carbhub WT-875 Carburetor for Craftsman Poulan Pro Blower BVM200C BVM200VS P200C GBV325 P325 with Fuel Line Filter Gasket Spark Plug Replace 545081855 WT-875 WT-875A. To execute this step, you need to find the LA screw. This 20 in. When the chain stops, notice if the throttle is still responsive. Luckily, adjusting is not that tough if you know how to adjust a Poulan chainsaw carburetor properly. Determine the low-speed jet (marked L on carburetor) and high-speed jet (marked H on carburetor) at first. If necessary, you can modify the idle screw (the one marked with a T) until your chain stops rotating. Buy Poulan Pro Handheld Leaf Blower/Vacuum, 25cc 2-Cycle Gas, 450 CFM, 230 MPH, 967623001 at Tractor Supply Co. Poulan Leaf Blower Troubleshooting & Repair. Its tempting to turn the L and H screws to make the chainsaw be as responsive and as fast as possible. So, the chainsaws engine will stop or stall if it cannot burn all of the gas. Too much density limiting air flow?). Certain models of Poulans, utilize a sort of screw called a "spline screw.". Congratulations! into seat lightly (So they are just bottoming out). Get outdoors for some landscaping or spruce up your garden! The Definitive Answer, Is a Tsumura Chainsaw Bar Superior to A Stock Chainsaw Bar? They can be bought from numerous retailers however are not promptly accessible from carburetor producers. Ive worked with top interior designers and architects of the city. You did it! I specialize in restoring, repairing, designing, and decorating. However, this chainsaw has some very specific instructions. A stalling chainsaw engine can be caused by a few different scenarios. How to adjust the carb on my Poulin Pro 42cc chainsaw,.and my special screwdriver tool to adjust the carb. Before you begin the adjustment procedure start with fresh gasoline with the proper fuel and oil ratio. Dellorto Rebuild Manual autodesguacechurriana com. Always keep your eyes on the sharp edges so that they can damage your skin entirely. Dont Miss: Echo vs Husqvarna Chainsaw- A-Z Differences. NEVER SET THE SPEED OF YOUR CHAINSAWS ENGINE ABOVE THE MANUFACTURES SPECIFICATIONS. Note: Different model Poulan chainsaws have different operating specifications in regards to idle speed and maximum allowed RPMs. Put a Bailey's 30lp chain on it. From repairs, sales, equipment operation, and safety I can help you with your questions. Next, position the chainsaw on an even surface, keep things away from the chain, and switch on the engine. Engines that run at too high of a speed can be destroyed or run inefficiently. Too lean adjustment can lead the chainsaw to bear failure and cylinder seizure. The screw on top -- marked "T" -- is for adjusting the fuel mixture while the engine is idling. SERVICE MANUAL FOR POULAN - POULAN/PRO 33cc 34cc 36cc 40cc and 42cc 1900-1900LE-1950-1950LE-2050-2050LE-2055LE-2075 2075LE-2150-2150LE-2175-2175LE-2150-2150LE-2375 2375LE WILD THING-2250-2450-2550 POULAN PRO 220-221-221LE-260-260LE www.mymowerparts.com For Discount Poulan Poulan Pro Parts Call 606-678-9623 or 606-561-4983 Begin adjusting the carburetor on a Poulan chainsaw by undoing the retaining nut of the cover of the air filter by hand. warmed up. Will a Tsumura chainsaw guide bar fit your Hello, My Name is Steven R, and Im here to help!My family has been in the chainsaw and outdoor power equipment business for over 35 years.We are as qualified as anyone regarding tips and how-tos on operating, maintaining, and repairing chainsaws and other power equipment.I hope you find the information you are seeking. The chain must not move at idle SCREEN speed. chainsaw is powerful and easy to start and operate. Seat the low and high speed jets closed. How to Adjust the Fuel Mixture on My Poulan Pro Chain Saw. Hold the saw in place on the . The L screw controls the air-fuel mixture of the low end of the chainsaws throttle response. You have successfully adjusted the idle speed of your chainsaw. Walbro Carburetor Diagram WordPress com. Use tab to navigate through the menu items. Another reason could be a clogged carburetor or bad fuel. Using the special adjustment tool, seat both the low-speed (marked L on carburetor) and high-speed (marked H on carburetor) all the way closed. You will find a Low and High adjustment screw. Instead of the standard 16 or 18 inches, it comes with a 20-inch blade and 50cc engine power. Locate a tiny flat-bladed screwdriver before starting the saw. Poulan Super XXV factory carb settings. This kit is compatible with Poulan PRO Chainsaw models PP4218 and PP5020.. Joined Jan 12, 2010 Messages 866 Reaction . Lets get a quick overview of them. I checked the plug for 6e846d8fd7, 2023 by Spick & Span. If the idle is set to low the chainsaw will not idle and will die. If the end wears loose, use a PVC cutter and snip off an inch. The high and low-speed adjustment screws affect the chainsaws idling performance. If engine bogs when advancing Fit bottom of drive links between the teeth in the sprocket in the nose of the guide bar. So if it works incorrectly, your chainsaw will run poorly as well. The low-speed screw and high-speed screws need to be set at baseline to adjust a Poulan chainsaw carburetor. Never had an engine failure and I've never been happy with the factory settings. Well send you a nice letter with latest posts once per week. Adjust the L screw to get the saw to idle correctly.the other screw that adjust the idle speed may also require adjustment . lean mixture which will drastically shorten engine life! Screw both L and H down til they seat and back out 1 1/2 turns. The low-speed jet is supplying too much fuel and not enough air. The spark arrestor is a small screen that prevents the engine from emitting sparks. The carburetor regulates the fuel and air mixture ratio in the engine. poulan chainsaw factory carb settings, poulan pro 42cc factory carb settings, poulan pro 42cc chainsaw factory carb settings, poulan pro 50cc chainsaw factory carb . See IDLE wats the carb adjustments for a poulan pro pbv200 le. There are not many things that I have not seen in the business. Poulan Pro Pp5020av Fuel Line Diagram.. refer to Carburetor Adjustment. rich. How To Adjust A Poulan Chainsaw Carburetor Properly, 13/64 Vs 7/32 Chainsaw File-(Whats better and Whats not), 3/8 vs .325 Chainsaw Chain- Know Their Odds. Poulan chainsaw carburetor adjustment tool. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. On the one hand, youll need to tweak the T-Screw if the low-speed jet adjustment does not allow the chain to stop entirely at idle. Apart from that, other reasons include a bad gas mix and a dirty carburetor. When adjusting your chainsaw, be sure not to exceed the maximum allowed speed of idle and high-speed RPMs, as doing so can permanently damage your chainsaw. throttle, turn low idle out as needed to eliminate bog. With throttle at full, turn high screw in until engine runs The adjustment procedure isnt different for them. JavaScript is disabled. Once the baseline is set, adjust the low-speed jet until the chain stops turning at idle while the throttle remains responsive. - The Real Answer. All trademarks appearing on this page are the property of their respective owners. (Madera) NEW OLD STOCK, 2019 Poulan pro 5020. Most saws come already adjusted and need very little attention.. what is a poulan pro ppb4014? Their mind-blowing performance and many unique features naturally make them a top pick to chainsaw users. Hello, Im Johnathan Brewer, a professional woodworker and power tools salesperson. You've achieved the proper fuel mixture when the engine idles smoothly but the chain doesn't spin. Product Details. Electric sharpeners Stihl 194t vs 201t - Everything About Their Comparison. object cannot accidentally cause injur y. . on the negative. Jul 12, 2016 There's only 2 screws I take it? To get top-notch service from your chainsaw, it is important to sharpen the blade regularly. Step 2. This is ideally powerful and will ensure that you complete your wielding on . I guess I should add that I could get the saw to run easily by shooting Seafoam spray in the venturi at first, but now I'm trying to get it to run w/o additive AND the cover on. With throttle still at full and engine warm, turn high screw in/out until engine runs smooth. If the engine does not operate continuously, rotate the screw marked T or the idle screw by one clockwise turn using a screwdriver with a slot. The operating range of most Poulan chainsaws to idle is 2800 3400 RPMs, and full-throttle is 12000 12500 RPMs. I have been part of the chainsaw and outdoor power equipment business in one way or the other for over 35 years. The H mark on a chainsaw indicates its high-speed adjustment and the L mark talks about the low-speed adjustment. Adjusting the Low and High screws controls the chainsaws throttle response, (low end), and high-end engine RPMs. In this situation, you need to lean out the low-speed screw counterclockwise. If you are able to get the chain to stop completely at idle and still have a responsive chainsaw throttle you are done. If the carburetor is clogged it will need to be cleaned. Theyre throttle stop screws, low-speed fuel adjustment screws, and high-speed fuel adjustment screws. Cutting width. The low-speed jet and the T-screw, (idle screw), both have an impact on the idling of the chainsaw. Once the baseline is set, adjust the low-speed screw until the chain stops turning at idle while the throttle remains responsive. 1 1/2 allowed me to start and make needed adjustments. So read this guide to learn more! Continue with Recommended Cookies. Now, turn the T screw counterclockwise to increase the fuel mixture as well as the idle speed. Not getting sturdy floating shelves can not only be frustrating but also costly in terms of time, money, and effort. Poulan Super XXV factory carb settings . A lot of people asked on the internet- how to adjust the carburetor on a Poulan pro 42cc chainsaw? It Needs the carburetor cleaned before it will run.. Sep 9, 2019 597 Answers. Poulan Pro 40V battery chainsaws have a 4 year warranty. Adjustments may be necessary if.. Jun 14, 2021 This carburetor will only fit the X-Torq chainsaws. I have a poulan pro pp5020av chainsaw that won't start. Use the tachometer again to open the low-speed jet and the high-speed jet by making 1.5 rotations from the baseline or the closed position. The Rainbird 1/4" x 12" polyflex riser has a perfect inside diameter that fits snugly over the spline on the carb adjustment. These tools are readily available on Amazon and are always in stock. On the other hand, the air and oil mix is controlled by the H screw of the chainsaw throttles high-end response. The carburetor on a two-cycle engine that typically comes factory adjusted. 1. Plug seems to be wet, so I'm thinking the setting is probably too rich, but I don't know the factory specs. Completely disassembled it, cleaned it, replaced fuel line/filter, compression was just a tad over 100 PSI (not great, but should run), checked P&C which had no scoring (surprise). Does anyone know what the factory carb settings (Walbro WT-19A) should be on this Poulan? If so, turn the idle down until the chain ceases to turn. These screws directly affect carburetor function during the adjustment process and can cause an engine to run inefficiently if improperly set. Chain: Automatic chain oiler. The. $16.89. All Poulan Pro chain saws have two-stroke engines that take a mixture of gas and oil; the correct fuel/oil ratio is 40:1, or 3.2 ounces of oil per gallon of gasoline. PP5020AV 2 WJA. Your goal in painting your deck is to protect it from. The first responsibility is to fire up your chainsaw and get a flat-head screwdriver ready, Now, turn the screw clockwise or counterclockwise at this step, Next, observe the engines behavior changes both while youre throttling it and idling. Remember to be safe and wear your long pants, safety glasses, and leather gloves for protection. BAR speed. . The adjustment procedure will either lean out the fuel mixture by reducing the fuel and oil ratio to air or richen it by adding more gas and oil to the air mixture. PR5020. You will need to purchase this special tool to make the Adjust low speed at idle . Engine: OxyPower for higher efficiency. These jet screws control the proportion of fuel in the combustible air/fuel mixture at idle speed. Open the low and high speed jets 1.5 turns. After that, adjust the high-speeds jet screw to the position where its engine idles at the maximum RPMs allowed. It may not display this or other websites correctly. In these cases, the fuel and oil ratio to air needs to be enriched. $5894. There are 2 screws marked L and H. On newer Poulan saws the The label of adjustment screws is marked with these two letters. Turn the adjustment screws on the side of the carburetor to do this easily. Carburetor Kit For Poulan Pro PP5020AV PP5020 PP5020AVX PP4818AV 50cc Chainsaw. There is a letter stamped next to every screw. Seems to me your carb is badly mis-adjusted, or something else is amiss.. High/Low carburetor adjustment and Idle screws allow the proper airflow through the engine. High quality NEW replacement part Fits: Poulan 2700, 2800, 3000, 3100, 3300. . Back out For low-speed adjustment, turn the L screw accordingly. The manufacturer doesn't recommend adjusting the low- and high-speed screws yourself, which is why the screws are protected with covers. View and Download Poulan Pro PR5020 instruction manual online. It is a chainsaw!! Begin with the saws low-speed jet opening 1.5 rotations from the closed position when you adjust the carburetor on your chainsaw. The chain is moving during the adjustment process, so you should wear personal protective gear including safety glasses, a long-sleeve shirt, long pants, closed-toe shoes and leather gloves. Poulan Pro gas-powered chainsaws have a 2 year warranty against manufacturer defects. Turn both the low-speed jet and high-speed jet closed using the special adjustment tool. But the most prevalent cause of this issue is improper carburetor [, 25 Best Deck Paint Colors and Combinations, How to Fill Cracks in Wood With Epoxy A Step-by-Step Guide. The adjustments to it either make the fuel mixture richer, by adding more fuel and oil to the air mixture, or leaner, by reducing the fuel and oil mix ratio to air. Run the saw at high speed for 3-5 minutes so that it is fully An adjustment pin and screw is used to adjust the tension of the chain. Are Tsumura guide bars superior to stock guide bars? It also has to work when you are trying to start the engine cold and the engine is wide open. We and our partners use cookies to Store and/or access information on a device. Read morehere. The old adjustment used to be 1 turn out, but some of the newer carbs run 3 turns out. I'd try 1 1/2. of 20 17. When adjusting the low-speed jet of the carburetor of a Poulan chainsaw start with the low-speed jet open 1.5 turns from closed. Carb needs tuning. Lawn Motor doesnt seem to be getting any gas Plus a. Weight: 15.5lbs. Poulan Pro 5020AV carburetor adjustment. - The Definitive Answer. He has since built an enviable workshop for himself and an equally impressive online accomplishment: an extensive resource site serving old timers and novices alike. Never exceed the specifications of the chainsaw manufactures maximum RPMs, doing so can damage your chainsaw. Using the special adjustment tool, adjust the low-speed (marked L on carburetor) to the point where the chain stops turning while the throttle remains responsive. . To do this efficiently, turn both jets clockwise until they stop. One reason a Poulan chainsaw may run roughly is because of a clogged carburetor. Poulan put numerous anti tamper devices on there for a reason. Poulan 2700 - 3300 Chainsaw Carb Adaptor Intake Boot 530-027218 NEW 87-44-100 Carburetor carb to cylinder adapter intake manifold boot. $8.85. Low Speed screw: Turn clockwise (CW) until screw is seated/stops. Step 2. The H screw is for high-speed adjustment. The size of the tree being cut is irrelevant. The Best Benefits of HughesNet for the Home Internet User, How to Maximize Your HughesNet Internet Services, Get the Best AT&T Phone Plan for Your Family, Floor & Decor: How to Choose the Right Flooring for Your Budget, Choose the Perfect Floor & Decor Stone Flooring for Your Home, How to Find Athleta Clothing That Fits You, How to Dress for Maximum Comfort in Athleta Clothing, Update Your Homes Interior Design With Raymour and Flanigan, How to Find Raymour and Flanigan Home Office Furniture. Zama Carburetor. Today I had a little time to see what I could do about it. 33 ratings. How to ensure proper high and low-speed adjustment, link to How to sharpen a chainsaw blade with an electric sharpener (5 Steps! You are using an out of date browser. This carb has a separate idle speed screw, but if the mixture isn't adjusted right it won't idle no matter what you do with the speed screw. If required, replace the filter. Adjusting the saw while cold may result in an overly You must log in or register to reply here. If you buy something through our posts, we may get a small commission. Procedure for Carburetor Adjustment. The saw should start in this position. Plus, it does nothing for the carb. poulan pro factory carb settings, poulan chainsaw factory carb settings, poulan pro 42cc factory carb settings, . Preferably, have the H and L screws adjusted by a professional. With an experience of 11 years in this field, I can suggest the best tips for bigger DIYers. Before adjusting your Poulan chainsaws carburetor, you need to make sure your chainsaw has the following : A dirty air filter, bad fuel, or fouled spark plug will affect how your chainsaw engine runs. Then, take out the cover and air filter, and clean the latter using soap and water. They are typically labeled L (low speed jet), H (high speed jet), and I (idler jet). To Protect and Display Properly. This is done by turning both jets clockwise until they stop. Quick and easy to start, it features Soft Start, purge and integrated choke/stop controls. M . Remember, if you set the idle screw too high, the saw chain moves continuously. No impulse line on this model, draws from intake side. So it is a guessing game. I had TWO of the same carburetors, and used the best from each to make the best one I could (diaphragm and gasket carefully removed intact). How to Replace the Carburetor on a Poulan Pro Chainsaw. It won't even try to idle. Old improperly mixed fuel can cause a chainsaw to run erratically affecting your adjustments. Then, clean its dirty filter by following proper regulations, The ideal fuel/oil ratio is 40:1, or 3.2 ounces of oil per gallon of gasoline. There are even some great woodworking tactics that I'd love to share with you. If cleaning the .. Poulan pro 5020av carburetor adjustment . The low end is when the trigger is first pulled. $17.31. But the most prevalent cause of this issue is improper carburetor [1] adjustment. How Tight Should a Chainsaw Chain Be? It may not display this or other websites correctly. I just need an owners manual for a Poulan Pro PR65Y21MA wak. Now adjust the high-speed jet to achieve maximum permissible RPMs at full throttle. Fit chain drive links into bar groove. The chainsaw cant combust all of the fuel and the engine will stall. Passages cleaned. However, Poulan chainsaws require a special adjustment tool that has splined teeth to set correctly. Adjusting the Poulan chainsaw carburetor brings the highest perfection to your desired operation. The upper butterfly can be sticky and stick open, preventing a start. Robert Johnson is a woodworker who takes joy in sharing his passion for creating to the rest of the world. It should be able to run at full throttle under load. Hook up fuel lines properly. Make sure the following are present in your chainsaw before making any carburetor adjustments: Important Note: Your chainsaws engine runs poorly typically because of a clogged spark plug, contaminated fuel, or a dirty air filter. REPAIR REBUILD KIT TILLOTSON HU CARBURETOR Poulan 361 chainsaw USA Seller. Before understanding how to adjust a Poulan chainsaw carburetor, you should know about the carburetor precisely. Remember, if you set the idle screw too high, the saw chain moves continuously.