The idle of a chainsaw is affected by two different adjustments of the carburetor. 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. Mar 24, 2017 / PP4218a chainsaw carb adjustments. For a better experience, please enable JavaScript in your browser before proceeding. It runs and cuts great has brand new blade on it and brand new carb and air filter. 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. If this puts the engine on idle very quickly, turn the screw counter-clockwise soon after the saw begins to function. PP5020AV 2 WJA. The carburetor regulates the fuel and air mixture ratio in the engine. Factory renewed to original condition Poulan Pro PP4218AVX is an 18", A carburetor engine with a displacement of 36. Determine the low-speed jet (marked L on carburetor) and high-speed jet (marked H on carburetor) at first. Thread starter jstutz; Start date May 24, 2016; Status Not open for further replies. Modifying the H and L screws affects the throttle performance of the chainsaw, as well as the low and high-end engine speed RPMs. 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 Even if the idle, high and low-speed adjustment is okay, the chainsaw wont work for an inappropriate fuel mixture. You've achieved the proper fuel mixture when the engine idles smoothly but the chain doesn't spin. Poulan Super XXV factory carb settings . If you intentionally cross the RPM level, the chainsaw speed will be wasted sooner or later. You can adjust the fuel mixture on your chain saw. Start the engine and allow it to run for five minutes to warm. Remove anything that can get in the way of your chainsaw. To adjust the H and L or high and low-speed screws, follow the specifications of the manufacturer, and use a tachometer to measure the speed of the engine when rotating the screws. You need to make sure you rotate the screw far enough to stop the chain from turning. Rotate the saws T-screw in a counterclockwise manner, allowing a slow-speed engine until you get to stop the chain completely. 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. 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. THAT'S TAKING IT TO ANOTHER LEVEL, like the basement. Place your Poulan chainsaw on a flat surface before starting any operation. Seat the low and high speed jets closed. 7. To adjust the carburetor idle speed, locate the idle speed screw labeled with a "T" just above the primer bulb. 5hp Briggs and Stratton. Turn the T-screw counterclockwise to slow the speed of the engine until the chain stops completely. Powerful Performance. Hold the saw in place on the . To make things easier for you, our engineers will explain how to adjust the Poulan chainsaw carburetor in simple steps. If the engine runs sluggishly or stalls, you may have to change the amount of fuel the carburetor sprays into the combustion chamber; you do this by turning adjustment screws on the side of the carburetor. With that information and suggestions, you can do really good professional work in a very short time. . The manufacturer doesn't recommend adjusting the low- and high-speed screws yourself, which is why the screws are protected with covers. After starting the saw, modify the low jet until the chain stops or nearly stops while maintaining an active throttle. Its 50 cc displacement enables it to provide the user with a maximum speed of 9000 RPM. After that, adjust the high-speeds jet screw to the position where its engine idles at the maximum RPMs allowed. Apart from that, other reasons include a bad gas mix and a dirty carburetor. Billy, I have a relatives Poulan 2000 that has 105psi compression that will fast idle and rev fine but will not idle normally. This Dura Life engine has cylinders that are plated with chromium which makes it durable. Remember to be safe and wear your long pants, safety glasses, and leather gloves for protection. The low-speed jet is supplying too much fuel and not enough air. If it's not, there's probably a blockage in the carb. To replace the filter, start your Poulan chainsaw in a regular manner. If there's a blockage in the carburetor, try cleaning it using a carburetor cleaner. Manage Settings 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. PLEASE REFER TO YOUR OWNER MANUAL FOR THE CORRECT RPMS. As a result, the maximum power cant be generated. When it comes to sharpening, an electric sharpener is absolutely the best choice. A chainsaw is a dangerous instrument that can even cause deadly injuries. With throttle at full, turn high screw in until engine runs Step 2. Now slowly turn in the screw to a position where it idles the best. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. I help my friends and neighbors with their tools. Carb is pulling fuel from tank when cranked. She loves writing about careers for busy families as well as family oriented planning, meals and activities for all ages. What is the starting adjustments after repair for a Poulan Pro chainsaw modal #PP4218a? (NEVER EXCEED THE MAXIMUM ALLOWED RPMs FOR YOUR CHAINSAW; DOING SO CAN DAMAGE THE CHAINSAWS ENGINE). I'd try 1 1/2. Save up to 20% when you buy more. 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. current price $33.45. DOING SO CAN DAMAGE YOUR CHAINSAWS ENGINE. When the chain stops, notice if the throttle is still responsive. However, Poulan chainsaws require a special adjustment tool that has splined teeth to set correctly. This kit is compatible with Poulan PRO Chainsaw models PP4218 and PP5020.. Although it has an auto-oil feature, this is a saw that requires a bit of maintenance, but it comes . Noise: 102 dB. Adjustments need to be made to a carburetor when it dies after starting, is hard to start or dies under a load. You will need to purchase this special tool to make the The high and low-speed adjustment is all about controlling the engine speed. Use tab to navigate through the menu items. 1 1/2 allowed me to start and make needed adjustments. If the engine runs sluggishly or stalls, you may have to change the amount of fuel the carburetor sprays into the combustion chamber; you do this by turning adjustment screws on the side of the carburetor. Then, take out the cover and air filter, and clean the latter using soap and water. This sticky fuel can clog up the carburetor and cause the chainsaw engine to stall. Plug seems to be wet, so I'm thinking the setting is probably too rich, but I don't know the factory specs. This is ideally powerful and will ensure that you complete your wielding on . Cv Keihin Carb V Twin Mfg reacthealthy com. PR5020 chainsaw pdf manual download. Does anyone know what the factory carb settings (Walbro WT-19A) should be on this Poulan? If the chainsaw manual does not contain the specifications, have the screws adjusted by an authorized technician. Proudly created withWix.com. Instead of the standard 16 or 18 inches, it comes with a 20-inch blade and 50cc engine power. $8.85. Brand: Zama. Chainsaw . 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. 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. Follow the same manner of the low-speed adjustment for this operation. Non-running saw of my dad's that we are just trying to make run again. Before you begin the adjustment procedure start with fresh gasoline with the proper fuel and oil ratio. The ideal setting should be midway between these points. To Protect and Display Properly. JavaScript is disabled. There is a letter stamped next to every screw. Then back BOTH screws back out CCW one turn. Lawn Motor doesnt seem to be getting any gas Plus a. PR550N21R3. So if it works incorrectly, your chainsaw will run poorly as well. If you want something bigger than most chainsaws for regular homeowners, it might be worth checking out this model. Dont Miss: Echo vs Husqvarna Chainsaw- A-Z Differences. If the chain saw sounds as if it is running too rich, it will rev at high speeds and make a high-pitched sound. Poulan Pro PP5020AV 20-Inch 50cc 2 Stroke Gas Powered Chainsaw. Using the special adjustment tool, open both the low-speed jet (marked L on carburetor) and high-speed jet (marked H on carburetor) 1.5 turns from closed. Also, if you have a tachometer, adjusting the carburetor on a Poulan saw will be significantly simpler. tool. If the idle is set too high the chain will continue to move by itself. You always want the engine to run for a few minutes to get it warm before you start your adjustments, otherwise, you . I help my friends and neighbors with their tools. So read this guide to learn more! This sticky fuel can clog up the carburetor and cause the chainsaw engine to stall . HIPA Carburetor For Poulan Pro PP4218A 18" 42CC Chainsaw Parts Pro GAS SAW Carb Kit. All small engine carburetors have these three adjustment screws. Your goal in painting your deck is to protect it from. The. Poulan Super XXV factory carb settings. All you need is a tachometer. If your engine is idling, even then it has to work. Weight: 15.5lbs. (18) 18 product ratings - Carb Repair Rebuild Kit For POULAN PRO 3400 3700 3800 4000 PP395 PP385 PP375. Over time, the spark arrestor can become clogged with soot. If the chainsaw wont stop spinning when idling, its necessary to back it down. 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 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. For this, refer to the owners manual (or user manual). Not getting sturdy floating shelves can not only be frustrating but also costly in terms of time, money, and effort. 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. With a 50 CC 2-cycle engine, Poulan pro-PR5020 is an exceptionally powerful chainsaw and is easy to operate as well. The Rainbird 1/4" x 12" polyflex riser has a perfect inside diameter that fits snugly over the spline on the carb adjustment. The Definitive Answer, Is a Tsumura Chainsaw Bar Superior to A Stock Chainsaw Bar? Walbro Carburetor Diagram WordPress com. Back out The H mark on a chainsaw indicates its high-speed adjustment and the L mark talks about the low-speed adjustment. eHow may earn compensation through affiliate links in this story. Are Tsumura guide bars superior to stock guide bars? Chain: Automatic chain oiler. 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. Locate the 3 different adjustment screws that are placed near the start cord on the chainsaw's body. Open as PDF. Well send you a nice letter with latest posts once per week. No filter in saw, so I made one from a Briggs foam filter (I'm suspicious of this, since I cut it to fully fit the spot where the filter should be. on the negative. Jul 12, 2016 There's only 2 screws I take it? It can be caused by the buildup of fuel in the carburetor, which eventually evaporates and leaves behind a sticky substance. I just need an owners manual for a Poulan Pro PR65Y21MA wak. Are you trying to decide if a Tsumura chainsaw bar is the right choice for you and your chainsaw? Next, make sure to consider your safety. In the same way as a cars carburetor or any other small engine, the carburetor of a Poulan chain saw runs on fuel. The Real Answer, How to Best Store a Chainsaw? In this case, the mixture should be leaner to prevent engine damage. Problems 17 The chain must not move at the factory. In this case, the low-speed screw will need to be leaned out (turned counterclockwise). Also, its important to understand the speed adjustments for the best output. (Madera) NEW OLD STOCK, 2019 Poulan pro 5020. $16.89. Step 1. The screw on top -- marked "T" -- is for adjusting the fuel mixture while the engine is idling. Feel free to leave any questions you have in the comments section and I will do my best to answer them!Thank you for stopping by chainsawace.comSteven R. This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Before understanding how to adjust a Poulan chainsaw carburetor, you should know about the carburetor precisely. Lets get a quick overview of them. Determine the low-speed jet (marked L on carburetor) and high-speed jet (marked H on carburetor) at first. If your chainsaw stops working when the saws throttle is active, the gas mixtures bottom end is excessively rich. The idle speed of your chainsaw is impacted by the two varying adjustments on its carburetor. Was: $20.37 17% off. Poulan PP442 Pro Gas Blower (3 Pack) Replacement Filter Assembly # 490192097-3PK. So, all other parts must be properly functioning before making any carburetor adjustment. Before starting, you need to understand what is meant by H and L on the chainsaw. Hello, Im Jonathon Brewer, a professional woodworker and power tools salesperson. What is the correct adjustment procedure for their pro model ? The adjustment procedure isnt different for them. If the adjustment is too rich, the desired RPM level cant be achieved. Remove this cover with a T-27 screwdriver to access the adjustment screws, which are usually on the left side of the engine as viewed when holding the chain in front of you. How Tight Should a Chainsaw Chain Be? into seat lightly (So they are just bottoming out). Poulan Pro 5020AV carburetor adjustment. Idle speed adjustment has two segments: one screw and three-screw idle speed adjustment. Preferably, have the H and L screws adjusted by a professional. Carb needs tuning. NEVER SET THE SPEED OF YOUR CHAINSAWS ENGINE ABOVE THE MANUFACTURES SPECIFICATIONS. No Spam. Sponsored. If you turn the idle screw too far counterclockwise the chainsaw will die, so make sure you turn it just far enough for the chain to stop turning. . On the other hand, the air and oil mix is controlled by the H screw of the chainsaw throttles high-end response. This part discusses a detailed adjusting process of the fuel and air mixture on a Poulan pro chainsaw. You can do this independently as long as you know what to do and how it must be done. Please refer to your specific Poulan chainsaws owners manual for your chainsaws specifications. #4. If required, replace the filter. Clean the air filter before adjusting the carburetor fuel mixture because the mixture will be too rich if you do it with a dirty filter. No impulse line on this model, draws from intake side. The chainsaw carburetor works on the performance of its carb. Poulan wants to keep their ways & means a secret, but I know the information is out there. Do not forget to maintain safety since you are dealing with a risky machine. We and our partners use cookies to Store and/or access information on a device. Ensure that your chainsaw lies on a flat surface and you hang the Poulan chain over the edge. You are using an out of date browser. Clean the arrestors screen using a wire brush. so I started adjusting the L & H adjustment screws and now it won't start. screws have a spline head that can't be turned without a special Then start adjusting different parts of the carburetor including idle speed, high and low-speed adjustment, and fuel ratio. Fix #1: Clean the Carburetor. Begin with the saws low-speed jet opening 1.5 rotations from the closed position when you adjust the carburetor on your chainsaw. For a better experience, please enable JavaScript in your browser before proceeding. 530-027218, 530027218, 27218. If the carburetor is clogged, try cleaning it with carburetor cleaner. Keihin Fcr 39 Manual Pdf WordPress com. Find the lean and rich points and stop at the medium point between them. The air and oil mix is controlled by the L screw of the chainsaw throttles low-end response. If you didn't change the carb settings, they may have been too lean from the factory, or it may have been partially gummed up from sitting. Carburetor For Craftsman Poulan Pro 20" 50CC chainsaw. 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. When you have a large engine size, you will need greater displacement and power to run the chain. Adjusting the Poulan chainsaw carburetor brings the highest perfection to your desired operation. Now adjust the high-speed screw to achieve maximum permissible RPMs at full throttle. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Rotate the screw labeled 'L' clockwise using a flat-head screwdriver until the end. 386 sold. Jonsered 2077 ,2083 and Poulan Pro 415 Chainsaw Chainbrake Brake Handle Chainbrake brake handle . Zama Carburetor. I have been part of the chainsaw and outdoor power equipment business in one way or the other for over 35 years. Adjusting the Low and High screws controls the chainsaws throttle response, (low end), and high-end engine RPMs. Ive worked with top interior designers and architects of the city. In some cases, it is necessary to adjust the idle speed screw, (marked T on the chainsaw cover), until the chain halts turning. Also, note the setting at which the engine functions normally and continuously. Read morehere. JavaScript is disabled. These tools are readily available on Amazon and are always in stock. Poulan XXV/Craftsman 358.35504 Carb question, echo 301 341 346 carb and limiter caps question. Turn both L & H C.W. Register today and take advantage of membership benefits. Step 3: Make sure you have about half a tank of fuel. in/out until engine runs smooth. Cutting width. I checked the plug for 6e846d8fd7, 2023 by Spick & Span. ), 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. You did it! Continue with Recommended Cookies. 50 cc, 2-cycle engine features Super Clean air filter system, aluminum Professional style clutch cover for more durability, automatic chain oiler, tool-less access to air filter and spark plug, reduced vibration handle with effortless pull starting system - purge and spring assist, a dual post chair brake for better safety and easier on the left side, and . Your Frigidaire appliance has a model number tag affixed to it at the factory. Engine: OxyPower for higher efficiency. So it is a guessing game. Carburetor Repair Rebuild Tool Kit For Poulan Pro Craftsman Walbro WT-875-A New Product Description & Features: 100% Brand new and High quality. Carb Rebuilding Honda Poulan Pro 40V battery chainsaws have a 4 year warranty. lean mixture which will drastically shorten engine life! The L and H adjustment screws on your chainsaw are for low-speed and high-speed carburetor adjustments. I have also seen the intakes crack on those a time or two. Reed valve is okay. But if you set the idle speed screw too low, your, There are several reasons why your chainsaw dies after filling it with gas. . Fuel tank has pressure when gas cap loosened. Adjustments may be. Free Poulan P3314 manuals! Choosing the wrong wood can, What could be the best deck paint colors and combinations for your house improvement? A basic procedure is to start the saw, turn the screw clockwise until the engine begins to stall for lack of fuel, then back the screw off until the engine stalls because it has too much fuel. See IDLE wats the carb adjustments for a poulan pro pbv200 le. Adjust the carb at full throttle / no load for just a little burrble / 4 stroking. Sitting here at my work desk, I thought about customers most common questions regarding their Poulan chainsaws. Make sure this fits by entering your model number. Corner. They are typically . You will find a Low and High adjustment screw. Start the chain saw as you normally do and let it idle, making sure the chain does not touch anything. The old adjustment used to be 1 turn out, but some of the newer carbs run 3 turns out. If the end wears loose, use a PVC cutter and snip off an inch. Also for: 967061401, 967061501. . I specialize in restoring, repairing, designing, and decorating. Part number: 967061501. To get a true adjustment of the carburetor, all other options need to be in correct working order. throttle, turn low idle out as needed to eliminate bog. Almost every chainsaw comes with three adjustment screws. adjustments. The carburetor is set correctly at the factory, but adjustments can be necessary if .. Remember, if you set the idle screw too high, the saw chain moves continuously. Then, take out the cover and air filter, and clean the latter using soap and water. Always keep your eyes on the sharp edges so that they can damage your skin entirely. I understand the need to promote your own certified dealers, but not for carburetor settings. If you buy something through our posts, we may get a small commission. It also has to work when you are trying to start the engine cold and the engine is wide open. One reason a Poulan chainsaw may run roughly is because of a clogged carburetor. Register today and take advantage of membership benefits. The size of the tree being cut is irrelevant. Adjust low speed at idle . Product Details. If the bulb isn't pumping fuel properly, it's more than likely a bad fuel line or the bulb is bad. With that information and suggestions, you can do really good professional work in a very short time. Poulan P3816 Chainsaw User Manual. When you enable the low adjustment by releasing the throttle trigger, the engine will die. So, the chainsaws engine will stop or stall if it cannot burn all of the gas. It happens when you can successfully idle down the engine, but the chain doesnt spin. Powered by a 50cc 2-cycle engine, the Poulan Pro PR5020 chainsaw is powerful and very easy to start and .. Apr 18, 2012 Start by locating the three adjustment screws. REPAIR REBUILD KIT TILLOTSON HU CARBURETOR Poulan 361 chainsaw USA Seller. 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. Wear protective equipment like goggles, hand gloves, helmets, and others. Next, adjust the saws low jet to the position where the saw chain stops moving while its throttle is still responsive. This forte screw must be adjusted by utilizing a spline device. Now, refit the arrestor and filter, and switch on the chain saws engine. 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. If it pumps properly, choke it and try to start it. This is done by turning both jets clockwise until they stop. are you sure its back together right? Poulan put numerous anti tamper devices on there for a reason. When it comes to chainsaw maintenance, one of the most important questions is, how tight should chainsaw chain be? Too little tension can cause excessive chain, sprocket, and bar nose wear and Is a Tsumura Chainsaw Bar Superior to A Stock Chainsaw Bar? Free shipping. How to adjust the carb on my Poulin Pro 42cc chainsaw,.and my special screwdriver tool to adjust the carb. poulan pro factory carb settings, poulan chainsaw factory carb settings, poulan pro 42cc factory carb settings, . The high and low-speed adjustment screws affect the chainsaws idling performance. The H screw is for high-speed adjustment. Step 2. If your engine idles too fast the chain will keep turning and can result in injury. If the carburetor is adjusted with no fuel in the tank, things can change once the fuel tank is full, which can lead to adjustments that are too rich. of 20 17. If the chainsaw is accelerating slowly, its suffering from an insufficient fuel issue. Could be as simple as idle screw need 1/2-1 turn CW. Ive worked with top interior designers and architects of the city. The chain must not move at idle SCREEN speed. Apply the special adjustment tool so that you can set both jets all the way closed. Next, start the chainsaw in a regular manner, Now, insert a flat-head screwdriver into the idle speed screw, Turn the instrument clockwise so that the engine speed increases, Keep turning the screw counterclockwise until the engine stops, After a while, the desired speed adjustment will be fixed, Your first task is to find the throttle stop screws from above the primer valve. A Poulan chainsaw carburetor is much easier to adjust if you have access to a Tachometer. You are using an out of date browser. Its lightweight body and powerful engine promise high efficiency, low emissions, and low fuel consumption as well. Adjusting a Poulan chainsaw carburetor does not require a bachelors degree or an authorized technician certificate or license. 1,311. Now, follow the single-screw adjusting process to complete this step. Instead of making the adjustment yourself, Poulan Pro chainsaw factory carb settings should be adjusted by an authorized technician who can do the job properly, using a tachometer. 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. 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. Take note, turning the idle speed screw too far will result in the saw to run inefficiently, or it will die. Poulan Pro PP5020AV 20" Gas Chain Saw. If you face trouble in determining that point, notice where the engine archives maximum allowed RPMs. Poulan Pro Pp5020av Fuel Line Diagram.. refer to Carburetor Adjustment. The carburetor has been carefully set at the factory. Make a note of the position of the screwdriver slot and compare it to the position of the lean adjustment. 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. It won't even try to idle. 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. In the case of bad fuel, the tank will need to be drained and fresh full added to the unit. . Closing the low and high-speed jets, Step 6. Apache/2.4.10 (Debian) Server at www.forestryforum.com Port 443 that simply looks more professional and turf-like than riding mowers without this feature would be able to produce. If that doesn't work, try 2. or Best Offer. It'll start, but will not continue to run. Certain models of Poulans, utilize a sort of screw called a "spline screw.". - The Real Answer. For additional information, these are widely known as the idle speed screws that control the throttle valve. I bought a Poulan chainsaw new when I moved to Florida in 2002. . Another important part is maintaining the correct fuel ratio.