Craftsman Chain Saw - Revs very, very high on idle May have to go back and forth between idle & L mixture screw. When the RPMs are too high, it can be pretty dangerous as the chain can get engaged. Also, please be careful when you deal with dangerous equipment. Manifold damage can happen when its used for a long time. Ok so today I went out to pursue a great find on CL, a nice ms 880 for $650 (I was set on finding a 660 for that price). Its a huge mood killer, right? Changing the carburetor settings with a plugged muffler may result in the saw running to lean when the carbon build up is cleaned out. (3) If carburetor adjustment is required due to a new or rebuilt carburetor, it is best to start with the fuel adjustment settings one turn out. The only start I get is if I pull and reset choke. Ok, so $35 on ebay for a new 60mm piston kit and cross my fingers that i can salvage the cylinder. STIHL chainsaws have many more features, including anti-vibration technology for enhanced comfort. Wrong assumption. JavaScript is disabled. It cant be allowing both in or both out. Some carburetors need a specialized tool to adjust their throttle control screws. Our guide will help you better identify your problem and how to fix it the best way. If that doesn't get the saw running smoothly, it's probably time to bring it in for servicing. The high-speed setting controls the maximum engine RPMs. Also, you can try using 10w40 chainsaw bar oil.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'thejimbosliceworkshop_com-large-leaderboard-2','ezslot_8',112,'0','0'])};__ez_fad_position('div-gpt-ad-thejimbosliceworkshop_com-large-leaderboard-2-0'); This is mostly because of poor carburetor adjustment. 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. If the engine dies while idling, the idle adjustment needs to be tightened. It's best to check the owner's manual, or do a web search for your make and model, to ensure you've found the proper screw or screws to adjust. The air filter in your chainsaw protects your chainsaw from dirt and debris by filtering it out before it can reach the engine. This is the control for air/fuel mixture when you're running the saw at high-speeds or during cutting. Disconnect the fuel filter from the fuel lines, and at this point you can either clean or replace the filter to solve this problem. Thread starter chad556; Start date Feb 26, 2011; 1; 2; 3 . If the engine doesn't stall until you depress the throttle, tighten either the low-or high-speed adjustment screw to improve performance. If the chainsaw's being stubborn and is hard to start, that's an indicator that the fuel and air mix are off. If you adjust your saw with a dirty air filter, the saw will run too lean when the filter is cleaned. (2) Check the muffler and exhaust port for carbon build up. In that case, go to a chainsaw shop or hardware store to have a pro check things out. JavaScript is disabled. In the article, I will explain this in more detail to help you tune and optimize your carburetor setting. Turn it so you know where the lean and rich points are, and then find the medium between them. These seats are delicate and if they are damaged, the carburetor has to be replaced. (4) Check the fuel level. A mixture that is too lean will allow the engine to reach an RPM level where bearing failure and cylinder seizure are likely. Correct Way to Adjust or Tune the Carburetor on a Chainsaw? The fuel runs from the fuel tank to the carburetor through these veins. Idling it for longer durations wears the clutch bearing and causes carbon buildup at the exhaust. If your saw dies at idle, turn the idle screw clockwise until the chain just starts to move.
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