A dirty carburetor is likely to cause Chainsaw Bog.In this case, the speed of the chainsaw will dwindle a great deal.Dirt in the spark arrestor or air filter can also cause the chainsaw to bog. on Chainsaws, Started by rapserv When I remove the cover (13), I find the upper surface of the filter (2) heavily contaminated (this is an aftermarket eBay filter, perhaps it is not sealing properly? Kilikoba Nashoba 858 subscribers 46K views 7 years ago This video is about likely causes of a Stihl chainsaw engine. keep cutting with precision and efficiency. Adjusting the H screw will help achieve optimal performance. Cant get a good picture becouse of the glare of the piston. No particular problem restarting. The first step is to make sure that your chainsaw has enough fuel. A carburetor is a part of a combustion motor that mixes air and fuel in a specific ratio for combustion. All fuel supply components must be independently examined to address these difficulties, as discussed in the following sections. Following the L modification, the mixture composition should be adequate to keep your engine running. Your manual will provide detailed instructions on how to do this. Remove the filter from the tanks bottom and clean the stale gasoline deposits from the filters jets with a metal wire. The saw has been well used over the years (1998) and not really well looked after. When the mixture in the carburetor is too lean, the engine races and overheats and the piston can seize. When dropping a tree, what are you guys watching?. A clogged air filter or spark plug can cause your chainsaw to start and then stop. ), Using a specialty tool called a scrench or a combination wrench, loosen the bar nuts holding the clutch cover in place, Tighten the chain tensioning screw using your combination wrench or scrench while raising the tip of the bar and, Continue to tighten the chain until there is no slack on the underside of the bar, but it can still be freely pulled by hand, Tighten the bar nuts, return the clutch cover to its rightful place, and ensure that the bar is secure. When your Stihl MS 170 chainsaw drops its power under full load, it generally means there is an improper mixture of fuel and air in your carburetor. Clean out the air filter and carburetor. We and our partners use cookies to Store and/or access information on a device. Replace it if the quality has deteriorated. I think I am having the same problem with mine. Inspect the clutch center, drum, and spring for any excessive wear. Page created in 1.341 seconds with 39 queries. Its all clean just a blackish color.
Start by identifying the carburetor on your saw. Clean your spark plug and measure the gap. If you observe any evidence of damage or wear on the air filter, I recommended to replace it. Disengage the chain brake and manually advance through the chain until you reach your starting point mark. Unless you are running an electric chainsaw (which is a totally different beast), your chainsaws motor is a combustion system that relies on a proper ratio of gas, oil, and air. I hope my epic guides will help you to choose,buy and maintain chainsaw.
The most common causes of a chainsaw bogging down include: Incorrect fuel mixture Dirty carburetor Clogged air filter Dirty fuel filter or fuel lines A combustion system depends on a proper mix of gas, oil, and air. Firewood, Heating and Wood Burning Equipment, Lady on ebay selling hundreds of chainsaws. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust . But soon loses power and bogs down. The majority of chainsaws operate on one of the three following gas-to-oil mixtures: If you have already mistakenly filled your chainsaw with the wrong fuel mixture, you will need to drain the incorrect fuel and replace it with the right mix. Updated: 00/04/25
The chainsaw bogs down will occur when your engine is starved of enough fuel or when there is termination in the connection between the carburetor and the engine. Sometimes the L adjustment is insufficient, and you must tweak your fuel delivery components, specifically the carburetor and filters. The L screw controls how much fuel enters the carburetor at low speed, whereas the H screw controls how much gasoline flows into the carb at high speed. var ry=Math.floor(Math.random()*myimages2.length)
After a little looking, the two nuts that hold the back of the carb and filter housing were loose, I tightened them up and it ran like a top. Why does the chainsaw bog down at full throttle? Run the saw in idle and make sure the idle speed is consistent, and then rev it up and listen for any unexpected changes in engine noise. I'm having trouble with my Stihl MS180 C-BE chainsaw. The L screw, for example, controls the gasoline entering the carburetor at low/idle RPMs, whereas the H screw regulates the fuel flow at higher RPMs or wide-open throttle (WOT). Also, use a clean cloth and some carburetor cleaner to wipe down the inside of the carburetor. Aside from that, there are a number of other causes that can cause a bog which are as follow: The motor of a chainsaw is a combustion system that depends on an adequate ratio of gas, oil, and air. It is responsible for mixing fuel and supplying it to the engine. Nowadays, most chainsaws use a 50:1 ratio, but some use a 40:1. Finally, replace the fuel filter and air filter and reconnect the spark plug. or a blockage in the mesh strainer in the pump chamber. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-leader-2','ezslot_17',164,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-leader-2-0');If the fuel lines are blocked or restricted, clean or replace them accordingly. The spark arrestor is a small screen that prevents the engine from emitting sparks. Your email address will not be published. It may not display this or other websites correctly. Make sure it is moveable and not stuck in the open or closed position. There are a number of issues to check in a sequence as why a mini chainsaw would bog at full throttle. Save my name, email, and website in this browser for the next time I comment. document.write('')
Proceed with adjusting the carburetor adjustment screws to fix a chainsaw that wont start. I ask if they checked the carb and they said no. Finally, replace the air filter on the chainsaw. http://www.ebay.com/itm/STIHL-017-MS170-018-MS180-Replacement-CARBURETOR-CARB-/130584786959?pt=US_Chainsaws&hash=item1e6775b80f, Quote from: rstarkie on June 06, 2013, 09:50:21 PM, Quote from: Submariner on December 14, 2018, 01:42:06 PM, Running problems Husqvarna 246 and Shindaiwa 457S probably bad fuel issues, Figured Out My Efco 251 Fuel Starvation Problem (shuting off after 4 or 5 min. The dream of everyone in the lumbering field is to have a powerful and efficient chainsaw devoid of mechanical faults. If you don't know about the perfect amount . When a screw (e.g., anL screw) is tightened, the fuel flow to the carburetor is restricted, causing the mixture to be lean. Dont forget that a maintained chainsaw is a working chainsaw! Cleaning a carburetor on a chainsaw without removing it can be done with a few simple steps. 2023 "Chainsaw Guru". Over 200+ free JavaScripts here! Ozito 25.4 cc 305 bar, starts, easily & comes off choke & idles, will rev up on the ground, pick it up off the ground & it dies & stops, Put back on read more. For professionals and homeowners, taking care of their chainsaws is very important. Check that the anti-vibration elements are not damaged, torn, or soft. To unclog the spark arrestor, remove it and clean it with a wire brush. The majority of these steps are listed above in the daily maintenance list, but one is of top priority: Chainsaws require maintenance to stay at the top of their game. You will also reduce kickbacks and increase the overall safety of operating your chainsaw. Tuning regulates the flow of fuel through the might be the last resort and for that, always seek professional help. Be sure that your oiler is adequately lubricating your bar and chain. If your chainsaw dies when you give it gas, you need to ensure that the idle screw (I) and low-speed screw (L) are adjusted correctly. The spark arrestor is a small screen that prevents the engine from emitting sparks. Most Craftsman models have either a standard Walbro or a Zama carburetor. Check cooling fins on the cylinder and clean if needed. Madsens Shop & Supply, Inc.: Carburetor Adjustment on Pro Saws, TEK Indoor Environmental: Stihl Chainsaw Carburetor Adjustment, Beautiful houseplants that also repel mosquitoes, cockroaches and other pests, The Tools for the Adjustment of the Carburetor on Craftsman Chainsaws. When a clog occurs, your engine will not get enough air to operate effectively. If needed, purchase the tools from a hardware store and make sure you have personal protective equipment (goggles, gloves, etc. ) If your Stihl saw keeps stopping, there could be several potential causes. Chainsaw starts but dies when I give it gas. Solution: Use the user manual to locate the air filter. The Job of the Carburetor Without the right amount of air and fuel in the piston cylinder, the 2-cycle engine in a Stihl chain saw runs inefficiently and the saw loses power. That should help improve the performance of the chainsaw and resolve the issue of your saw stalling when you give it gas. Finally, check the choke. The idling (I) screw regulates the mass flow rate of the air-fuel combination entering the engine at idle. By, Read More Chainsaw Too Much Compression: Causes & SolutionContinue, Your email address will not be published. This can also be caused by bad fuel. You should also check the spark plug and air filter to make sure that they are not clogged or damaged. To check if theres a vapor lock, unscrew the tanks cap and put it back on again. The Job of the Carburetor Without the right amount of air and fuel in the piston cylinder, the 2-cycle engine in a Stihl chain saw runs inefficiently and the saw loses power. Spark arrestor is usually placed behind muffler, so locating it is not that hard. Where are these located and on what carbs? There are many factors that cause a bog down, but mostly it is the carburetor orientation or blockage. Heres a quick rundown of daily, weekly, and monthly maintenance tips: Chains will loosen over time and use. Here are the solutions for common reasons why chainsaw bogs down after giving it gas - 1. Additionally, inspect the air vents on the engine to make sure they are not blocked by leaves or debris.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-banner-1','ezslot_4',157,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-banner-1-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-banner-1','ezslot_5',157,'0','1'])};__ez_fad_position('div-gpt-ad-remodelormove_com-banner-1-0_1');.banner-1-multi-157{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:250px;padding:0;text-align:center!important}.