Then required several pulls of the rope to bring it back to life, almost like it was flooding itself. If you decide to make the repairs yourself, you have three maybe four things to think about. Fuel lines are good. Unhook the rubber wire from the end of the spark plug. Chainsaw manufacturers sometimes substitute different carburators. It appears to be a crude adjustment but this is the only adjustment that controls the flow of fuel from the tank into the carburetor and into the engine, and is more like an on/off contol. However, I have adjusted some really bad looking metering diaphrams and compensated for their bellow by adjusting the lever and they still work. I did notice that the diaphram that actuates the fuel lever is concave, ie, when assembled, the gasket pin will press on the fuel lever a little but I could not force any air, by blowing into the fuel inlet port after I got it re-assembled. Over time, the spark arrestor can become clogged with soot. This saw is flooding when sitting still, totally unacceptable ! Husqvarna 240 chainsaw is driven by its X-Torq® Engine. 3. 3.4 Nm; 2 cycle engine with intertia activated chain brake for safety while operating; Orange Husqvarna chainsaw Bar cover and 2. When the spark plug doesn’t generate sparks, the fuel mixture builds up until it floods the engine’s interior, often resulting in leakage from the exhaust pipe. (1) taking the carburator apart, you may be able to clean everything and use a can of propellant carb cleaner, and remove the needle and a really small spring inside the carburator cleaning the seat as well, but you may need a gasket/diaphram kit to put it back together, since sometimes the gaskets tear or get damaged. name (Walbro or Zama) and the numbers on the carburator castings which will identify the type and model number. I must admit that I'm dismayed about Husqvarna so far. New BV 250 blower Lightweight, comfortable, performing, To receive many offers, advice and news on the green world, © 1996-2020 Emak S.p.A. This keeps the chain from rotating on the bar as a safety measure. A good site to review is the "Walbro,com" site which has lots of carburator information that may help you, Also before you go ordering a carb repair kit, make sure you know which carburator is actually inside your chainsaw. In spite of their power and robustness, chainsaws are actually rather delicate machines that require careful and precise maintenance at every stage of their life cycle. Needless to say, I'm not a happy consumer right now. To crank from a cold start, turn the throttle open, turn the switch to the on position and pull the start cord three to four times or until you hear a “pop.” Then stop. I also did find this carb on the Walbro site and have the technical description and parts breakout. I picked up a Husqvarna 445 with an 18" bar a couple of weeks ago (manufacturer refurb on eBay) and used it extensively for the first time this past weekend. Neglecting to look after a chainsaw can lead to malfunctions such as flooding. Discussion in 'Chainsaws' started by ... idle for longer than 30 seconds. The spark arrestor is a small screen that prevents the engine from emitting sparks. There are two ways you can try to clear the unit of the excess fuel and get it chopping wood. What should you do in these cases? I had a Poulan Pro for over 10 years and it started every time without effort, less then $200 cost. I did find a little black debris in a hole on the diaphram side where the gas comes in. Set the "Master" control switch to the "Warm Start" position, push in the decompression valve button (which will open the decompression valve) on the side of the chainsaw, and pull-start the engine. Step 2 Confirm whether the spark plug is in good condition if you are having trouble starting the chainsaw. H.P. On the other hand, an over-rich mixture (with too much oil) generates a smoky exhaust and residues inside the spark plug, in the combustion chamber and near the cylinder, increasing the risk of ignition problems and associated damage. Anyhow, Please let me know If you have it working, you asked for the mechanics of how it works, the Walbro write up and description does a far better job then I could do. I hope I get it fixed with the gasket set. Husqvarna only covers carburetors for a year, which sucks really ! Flooded means there is excessive fuel pumped into the engine which has displaced the vital ingredient of oxygen for starting. They should replace your carburator, tweak the idle and high speed adjustments and you would be on your way in 10 minutes. Brand new chainsaw, but damned if I want another autotune chainsaw adjusted so that the chain from on. 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