But you have to find out whats wrong with your chainsaw. If your carb has three screws to tweak, you'll see labels. This is particularly true when you attempt to run your chainsaw on full throttle. Things might be a little more complicated if the problem is related to fuel delivery or to the composition of the fuel itself. However, if the cap is loose and air flows in, it will cause the fuel to spill out. This can be quite dangerous as the chain might damage anything in its vicinity immediately after the cord is pulled. Shutting them off without idling removes the air-cooling ability and may thermally overload the system, and this may cause damage to certain components in the chainsaw over time. By screwing the cap on you somewhat pressurize the tank. These seats are delicate and if they are damaged, the carburetor has to be replaced. (4) Check the fuel level. That is the solution to this problem is to ensure the screws are tight. Furthermore, extended idling intervals lead to increased fuel consumption and bar and chain oil. The comp is low on that saw and the sound of it running tells its running lean.Don`t run it any more in that condition. Its because it gets air locked inside the tank. If the filter becomes clogged, not enough fuel will reach the engine for it to run properly. Stihl. It may not display this or other websites correctly. Move the throttle plate on the carb to the idle position manually. If you think youve found just the right spot squeeze the throttle and the saw should rev up without any hesitation or stumbling. Top Reasons Chainsaw Starts, Then Stalls - YouTube Take care when removing the fuel lines with a twisting and pulling motion, and take off the carburetor linkage. Idle screws and high and low screws needs fine-tuning, Greenworks 20262 12-Inch Electric Cordless Chainsaw Review, How to put a chain back on an electric chainsaw without any difficulty, How to port a chainsaw and increase its cutting power, How to Start a Chainsaw for the First Time, How to Pick the Perfect Pressure Washer Wand, Choosing an outboard motor for your small boat, How To Choose the Best Snowblower For You. In this case, the filter is likely only partially clogged, so it will allow enough air to the engine for it to run on idle, but not enough to sustain full throttle. You must log in or register to reply here. Receive money-saving advice and special discounts! If the Stihl chainsaw does not keep speed and stalls idling, you can be almost 90% sure that it has a violation in the fuel pump system, as a rule, it is the air leaking into the crankcase through the gasket of the sump, or, much more often, through the oil seals crankshaft. With time, your filter gets clogged with harmful particles. Your chainsaw can lose power when youre using it because of a dull chain, or insufficient lubrication. STIHL chainsaws have many more features, including anti-vibration technology for enhanced comfort. A mixture that is too lean will starve the engine and cause it to race or surge. If a chain spins at idle, it can be due to the following underlying factors: When a chainsaw only runs ona choke, the fault is likely in the fuel delivery system, including the fuel filter, fuel lines, and carburetor. STIHL Chainsaws | Features & Specifications | STIHL USA Your email address will not be published. first question is are you in tree cutting business? Check the Filters. A lean condition also allows for excessive RPM which often leads to big end rod bearing failure. A chainsaw engine has three basic modes, i.e. The following nine brands are listed in no particular order. Using a flat head screwdriver, adjust each screw on the carburetor until a point is reached where the RPMs achieve an optimum value, which is neither too high nor too low. Clockwise is generally the direction you turn to make the mixture leaner, and counterclockwise usually makes it richer. Dont worry read till the end to clear out your doubts and fix them! Changing adjustments on one jet will often affect the other slightly. Next take off the primer bulb and cover, and make a note of how the lever, spring, and hinge pin go together on the inside of the carb. All these factors can affect your chainsaw and it dies after you oil it. There could be multiple reasons why your chainsaw dies. When there's too little fuel, the engine will run "lean" and won't have enough power, so using it as intended can cause engine damage. While using it yesterday it reved up and stalled. I used it yesterday for 30 minutes perfectly. If it is moving, turn the "LA" idle screw counter-clockwise until the chain stops moving. High and Low Speed Adjustments. Start the chain saw as you normally do and let it . This controls the air/fuel mixture when it's idling, or resting at lower speeds. Know that the filter is partially clogged. When I first worked on the carb, I noticed The Airhead Throttle was moving back and forth without any resistance. Or maybe gas varnish in the screen filter at the base of the metering needle. This is a dangerous condition and should never be allowed.2. Was the gasket there when you tore down the carb? This form of idle helps to cool down an engine before shut down. Fix your Lawnmower with our Lawnmower Troubleshooting tool. After some gentle scrubbing and a rinse with clean water, let it dry, and the filter should be as good as new. In post #10, the picture of the carb you can see the remains of the black gasket on the top cover. Then we adjust it lean causing it to sound smoother and then it starts to starve, also creating little power and creating a LOT of heat. Also, you can try using 10w40 chainsaw bar oil. My STIHL Saw Keeps Stalling | Home Guides | SF Gate This screw governs the amount of fuel that reaches the carburetor at low speed. Slowly turn in the screw until the engine surges or starves for fuel. This seemed kind of strange to me, the saw obviously has decent compression (nearly ripped my fingers off trying to start it) The dealer told the guy $700 to replace the piston and cylinder to get the saw running again. A clogged air filter will complicate any attempt to adjust your idle. Bar Its the central piece that the chain circles around. The air filter in your chainsaw protects your chainsaw from dirt and debris by filtering it out before it can reach the engine. Disconnect the fuel filter from the fuel lines, and at this point you can either clean or replace the filter to solve this problem.

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