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. imagelinks[3]="https://woodmizer.com/Store/Shop/Portable-Sawmills/LX25-Portable-Sawmill?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=lx25&utm_term=2023-02-10&utm_content=800x160" The air supply is just as important as a fuel supply in any internal combustion engine. Most Craftsman models have either a standard Walbro or a Zama carburetor. /* He tests chainsaws based on After engaging the throttle, place a digital tachometer next to the spark plug and turn the high-speed screw clockwise. It runs fine at all other times, cuts well and has good power. The ignition system is essentially a spark plug. Chainsaw Vapor Lock. Any factor that might affect supply can cause the chainsaw to bog down. Your manual will provide detailed instructions on how to do this. Take them out and clean them using a delicate brush. Firewood, Heating and Wood Burning Equipment, Lady on ebay selling hundreds of chainsaws. It may not display this or other websites correctly. The new fuel doesn't really clog the carbs. A Detailed Guide, What Size Chainsaw Do I Need in 2023? Home Why Is My Chainsaw Bogging Down? document.write('') Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada, Vendors: Accessories - Electronics - Recovery, sthil pics pictures by naturalite - Photobucket, http://s820.photobucket.com/albums/zz130/naturalite/sthil pics/. If the problems remain, examine the fuel lines and carburetor. To unclog the spark arrestor, remove it and clean it with a wire brush. imagelinks[5]="https://woodmizer.com/Store/Shop/Sawmill-Options/CookieMizer-Clamping-Jig?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=cookiemizer&utm_term=2021-03-09&utm_content=800x160" The remedy is to close the screw, but closing it too far is dangerous for the engine. Try to make the right call based on the cost and gravity of the issue. imagelinks[6]="http://www.ezboardwalk.com/" imagelinks[2]="https://woodmizer.com/us/Sawmill-Blades?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=sawmillblades&utm_term=2022-05-01&utm_content=800x160" The Forestry Forum is sponsored in part by: Maintenance is the key to sustenance. I think I am having the same problem with mine. Take a measuring beaker and add oil and gasoline of the required amount according to the model of your chainsaw. If the spark plug is cracked or damaged, you will need to replace it. ALL RIGHTS RESERVED! ), Woodmizer LT-40-HD http://www.welshtreeservice.com. Check for any loosened nuts or screws and retighten if needed. A well-maintained chain-saw seldom stalls. Required fields are marked *. Guess its time to pull the carby down and check the diaphragm and mesh. 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? 6. Adjusting the H screw will help achieve optimal performance. It is difficult to get the proper high-speed adjustment by ear -- most pros use a tachometer. The chainsaw will bog down or stop running. This will keep your chain in place for the next steps. By a silver star and you can post unlimited pictures. The engine should start by now. Page created in 1.341 seconds with 39 queries. Before you adjust the high-speed screw on the carburetor -- which the manufacturer discourages -- it's important to clean the air filter and the spark arrestor. Clean out the air filter and carburetor. Consider cleaning your carburetor and air/fuel filters if the problem persists. Make sure to take out the spark plug before removing the filter. Something may be amiss in the low or high speed circuit of the carb. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. Thoroughly inspect your throttle trigger. But soon loses power and bogs down. The saw also won't operate well at speed if the air filter or spark arrestor or carburetor are dirty. The imbalance of these components is one of the major reasons for bogging down. Cant get a good picture becouse of the glare of the piston. 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. By: Author Olin Wade (Remodel or Move Stuff). I have never worked on anything this saw. If a chainsaw is bogging down when it is throttled, this indicates that the gasoline to oil ratio supplied to the saw has been incorrect. document.write('') This makes the engine flood and as a result, the chainsaw bogs down. Why does my chainsaw stall when gas is given? function random_imglink(){ Correct mixing of fuel ingredients. All internal or external factors that reduce the supply of combustible air causes bogging down. Being in the cutting services for more than 10 years, I know a thing or two about chainsaw. Misaligned screws can cause bogging down, smoking in the chainsaw, and lower performance efficiency. Look over all cables, connections, nuts, and screws to ensure that they are not damaged and need replacement. After cleaning the air filter and spark arrestor, you should fill the tank, start the saw and let it warm up for a few minutes before adjusting the carburetor. Follow the re-assembly instructions which are usually supplied with the carburetor kit (Assuming all the jet screws and small parts are accounted for).Alternatively, you can use professional help.Usually, after thorough cleaning of the carburetor and filters, your stalling issues should disappear.However, if the problem persists you may need to enlist the help of a professional. If the problem persists, inspect the fuel lines and ignition system. (3 Common Causes). Use low pressure compressed air, and a stiff paint brush bristle to check them all. Step Three. imagelinks2[2]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" Also, use a clean cloth and some carburetor cleaner to wipe down the inside of the carburetor. An example of data being processed may be a unique identifier stored in a cookie. You should attend to all of those anyway, before you give it a clean bill of health. I'm having trouble with my Stihl MS180 C-BE chainsaw. Click to see full answer. To ensure any residue is removed, spray the inside of the carburetor with carburetor cleaner and scrub with a stiff brush. However, now it is acting odd. I love to write about chainsaw for homeowners and professionals. If your chainsaw doesn't start, adjust the carburetor screws till it doesn't bog down. Vapor lock occurs when the fuel vapor pressure builds up considerably in the fuel tank and isnt allowed to escape from the tank vents. All STIHL gasoline-powered engines can be used with up to a 10% (E10) blend of ethanol in the gasoline/engine oil mix. For professionals and homeowners, taking care of their chainsaws is very important. myimages2[3]="../../../images/top-banner/behindtheforum.jpg" function random_imglink2(){ While you are in there, check the spark arrestor screen to make sure it is clear and that there is not any debris clogging it. You must locate the perfect setting at which the engine won't stop once the throttle is applied. Chainsaw bogs on full throttle #63708 18/04/15 11:39 PM. Dealing with a carburetor requires strict guidelines to be followed. ,