The spark arrestor is a small screen that prevents the engine from emitting sparks. I have a Husqvarna 345 that stalls whenever I turn it bar side down and give it gas. In this cases, you need to turn the idle-speed screw and locate the point at which the engine will idle smoothly, and the chain doesn’t move on its own. 3 Posts . From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Chainsaw will idle but won't rev. Well, it depends on what type of idling issue we are talking about. Common solutions for: Stihl Chainsaw starts then stalls. Our phone number that can be found in our business seller information at the bottom of the page. The idle mixture adjustment screw is the one marked by an L on the casting of the carburetor. Apply - Answered by a verified Technician. Adjusting the idle screw, for instance, is a corrective measure for a chainsaw stalling when idle. The added fuel wets everything excessively and it makes it too rich to idle. If it lopes up and down and dies after a long cut it's too lean on the high side. The issue you’re facing is most likely being caused by contaminated, or improperly mixed fuel. 01 - Spark Arrestor. It happened when the filter became a block. If the chainsaw idles too quick and the chain moves on its own, then the mixture is too rich. Start by reviewing the correct starting procedures in your owner's manual. Plug checks are what I always do to identify the state of condition of any engine . Over time, the spark arrestor can become clogged with soot. ... Stihl ST251C Chainsaw Stalls when I depress the throttle. Have had cary apart and cleaned. homelite chainsaw stalls. Chainsaw fuel is a mix of gasoline and oil. According to its device, it drank a rather simple tool. The most common places for an air leak to occur are on the crankshafts seals. Discussion Starter • #1 • Jul 24, 2007. I have a L, H and T on the carb but cannot turn the L and H and the T seams to do nothing. In terms of its structure, the saw was a fairly simple tool. Useless for most of my cutting... but runs great in that position. The chainsaw is pretty new, a Poulan 16". My chainsaw will start and idle but won't run or stalls when I go to full throttle. I can close the needles, and open them too much. Adjusting the Idle Screw. It looks like it has never been used and I had no problem getting it started, but when I tried to get it to accelerate it would stop. I was able to tune it to run on full throttle (I turned it .5 turn rich). The low-speed adjustment is typically marked with an L and is what controls how much air mixes with fuel when at idle. What's wrong? That indicates that there is a problem with the transmission system. You can lean the L needle about 1/8th turn at a time untill it's nice and smooth on transition. The chainsaw stalls at idle speed: many owners of this tool face such a problem. Cases are common when the chainsaw stalls at idle. If it's an rwj, you should be around 1.5 turns out on the L, and 2.5 on the H. The Low Speed is the setting I do 1st in or out a 1/4 turn to ensure no hesitation . Common solutions for: Chainsaw starts then stalls. It starts and idles, stalls occasionally. Our repair guide can help you identify the right part to stop your chainsaw’s engine from dying at … The Idle Speed (once warmed up) so that chain is just tring to rotate , this ensures a good Cold idle without stalling. To check your air filter, remove it and perform a visual inspection. Your chainsaw might power on smoothly, but then the chainsaw chain refuses to move even after you engage the gears. Chainsaw starts then stalls. The spark arrestor is a small screen that prevents the engine from emitting sparks.