As soon as the engine starts, a vacuum is applied to the vacuum choke pull-down servo, which in turn pulls the choke open slightly--just enough to allow enough air into the engine to keep it running. Carburetors have either manual or automatic chokes. What Is Carburetor Choke Valve? Often when you need the choke on or partially on to run the engine (two-stroke) this indicates the filter because the choke is restricting air-flow and pulling in more fuel. Choke. Open the choke lever. Warning: Never start or accelerate the engine with the air cleaner removed in case of a back fire. Close the choke (put the choke on). The choke lever is located above the housing for the carburetor on the upper left of the motor. This pattern continues to repeat itself even after the saw is well warmed up. If the choke is opened to half open position, the engine will stop. Move the choke to the closed position which will also be marked on the trimmer. Pull the starting cord one time. Eye I have a Stihl BG55 leaf blower and I want to do a compression test on it but I'm not certain to the procedures involved. If the bike needs it, you can keep it at the halfway mark (Halfways closed or halfway open, I don't care). Turn your ignition to the "on" position. Primer Bulb The automatic chokes, which are the most common, work on a spring mechanism housed in a plastic cover located on the passenger side of the carburetor. When the engine heats up the spring expands and pushes the choke rod up, opening the choke. If the engine is cold the choke shutter should be closed. If it only runs with the choke wide open including at cold startup then the carb is flooding. The manual chokes require a choke cable to be mounted inside the car. This contraction pulls on the choke rod and puts pressure on the choke to close completely. Step 10 of 14: Pulling the starter rope again ... contact your STIHL Approved Dealer. When the choke is off, air flows in from the air filter. If you try to open the choke it begins to rev a bit but then dies. Functions and Advantages of Choke, Essential parts of carburetor and their functions, Constant choke carburetor and constant vacuum carburetor, Different Types of Cutting Tools Materials and Their Properties, Design and Working Principle of Simple Carburetor, Governor - Sensitiveness, Hunting, Stability, Isochronous, Relation between Hydraulic Coefficients – Coefficient of Contraction, Coefficient of Velocity, and Coefficient of Discharge, 3-2-1 Principle of Location (Six Point Principle) Degree Of Freedom Controlled By 3-2-1 Location Principle - With Image. Start with 1 and 1/2 turns each from the light closed position. Method 2 Starting a Carburated Motorcycle Look for the "choke" lever or cut-off switch. Stihl chainsaws denote the choke position using a nearly horizontal squiggle between two vertical lines at the lowest position on the master control lever. Choke is a butterfly valve that mounted on the inlet of air passage of carburetor (upstream from carburetor venturi tube). When the engine is cold, the spring is contracted and pulls the choke closed. Once the engine is warm, you can remove the air filter and check whether the choke is open or closed. Share the user manual or guide on Facebook, Twitter or Google+. This system comprises a STIHL Ematic or Ematic S guide bar, a STIHL Oilomatic saw chain and a variable-flow or reduced-flow oil pump. When choke is actuated by mechanical or by pneumatic method, it rotates an angle restrict the air flow (closed position). Open or Closed? With the engine cold, loosen the screws in the cover. If the choke does not close enough, turn the choke housing counter clockwise until the choke is just closed. Do not stick pins, nails, or any other sharp object into opening on top of can. If the motor struggles to run with the choke off there should be two carburetor adjuster needle screws that should be adjusted. Once you've tried some good stuff you'll wonder why you ever put up with junk. Close the choke and open the throttle. Keep away form heat, sparks, and open flame! Do you have the choke open or closed? Cancel Post comment. 0 /1024. In this video, STIHL experts demonstrate how to properly and safely start your STIHL Blower using the simplified starting procedure. Re-chocking (once until it kicks) gets it running again for another 20-30 seconds. Partially open the choke by moving the … The older style chokes have a coil spring mounted in the intake manifold with a rod from the spring to the choke. MS 170, MS 170 C, MS 180, MS 180 C English 29 Removing the chain sprocket cover NUnscrew nuts and remove chain sprocket Copyright 2020 Leaf Group Ltd. / Leaf Group Media. As the engine continues to warm up, the electrical choke responds to the heater inside and begins to expand and as it does, it begins to push the choke open. Move the choke control to full open position as soon as the engine fires. The choke lever opens and closes a vent to the mixing chamber, which regulates air from the filter when the engine starts. When the engine is cold the spring contracts, coiling more tightly. After looking at the linkage in the saw tonight it appears that the plastic tabs on the master control lever and the throttle trigger that are supposed to catch and keep the butterfly slightly open while In the choke and high idle position are slipping past one another allowing the butterfly to go back to straight up and down closed position. These electrical chokes have the ability to be adjusted. This also sets the carburetor to … November 17 by Donnie Roberts. It’s possible to download the document as PDF or print. My FS55 trimmer wont run off idle unless the choke is on and then it dies. When you inspect the choke, you also get a chance to look inside the carburetor. If the choke does not close enough, turn the choke housing counter clockwise until the choke is just closed. The typical Stihl chainsaw has a four position master control switch and you have to depress the top throttle lock on the handle and pull the throttle to wide open the close the choke plate by moving that master control switch to the most downward position. If the choke stays on too long or does not come all the way off, then turn the choke housing clockwise until the choke just begins to open and stop and tighten the screws. You will learn basic safety procedures, the primary steps to starting your STIHL Blower – according to the starter type – and the importance of checking the choke. Thanks to anyone who may reply My trusty (10 yr) old Stihl 16" chainsaw is starting fine (have to choke once until it kicks - which has always been the way) but it will only run for 20 or 30 seconds and then dies. You may see a pointer or a knob, but that is the choke and it should be labeled as such. This vent regulates air from the filter; when it's closed (choke is on), the air is blocked giving the fuel a richer mixture. Start the engine. When the choke is on, the vent is closed, blocking air from reaching the chamber. You can get new carbs cheap but if your considering upgrading now is a good time. There are two types of automatic chokes. The choke settings on a trimmer are manual controls that allow you to regulate the fuel and air mixture in the carburettor when starting the engine. If you open the choke slight … read more The choke is needed because the fuel does not evaporate completely when … Move the choke lever into the corresponding position to close it. STIHL CARBURATOR AND CHOKE CLEANER June 2, 2015 Page 4 of 8 Section 7. Stihl marks fully open with a symbol like three parallel lines. Here are the fixes I've tried so far: With the engine cold, loosen the screws in the cover. So if someone could give me some advice on this I'd really appreciate it. UserManuals.tech offer 52 Stihl manuals and user’s guides for free. Check the Gas Cap 11/09/2018 by Jack. Push the primer bulb in and release it slowly six times. To close it, move the choke lever to the cold starting position (top position). If the choke stays on too long or does not come all the way off, then turn the choke housing clockwise until the choke just begins to open and stop and tighten the screws. The proper way to start your Weed Eater trimmer's engine, according to the Weed Eater website, is to set the choke to the on position and pull the starter rope no more than six times. • If you will be cold starting your machine, just turn the choke lever dial to the ‘cold start’ position. The New Ryobis and Homelites are disposable, Many don't even have air filters. At this point, the choke should be open to allow the engine to breathe fully. Not illustrated: If the engine is warm, move the choke lever to the warm starting position (center position). Fine tune the (side) idle adjuster for your smooth idle speeds and the power adjustment on the bottom of the float bowl under load. Handling and Storage Precautions for safe handling Protective measures: Do not puncture or incinerate (burn) cans. Normally choke will be in open position, in which valve is parallel to the air flow, and has no effect on the air flow. STIHL Ematic System. Compared to conventional bars without Ematic, the STIHL Ematic system reduces the consumption of chain lubricant by up to 50 %, depending on the type of wood and the cutting attachment used. There are three screws around the cover of the choke spring housing. My Stihl chain saw (180C) will start, but will not keep running with the choke closed, which is normal. Do you hold throttle wide open? ... move the choke shutter lever to open the choke. Also use this position if the engine has been running but is still cold. Have a look at the manual Stihl Chainsaws Ms 180 C Manual online for free. Turn on the ignition of your car. I put a carb kit in it but still won't. any - Answered by a verified Technician We use cookies to give you the best possible experience on our website. These chokes are electrically heated to promote expansion and contraction. He has owned an auto service facility since 1982 and has over 45 years of technical experience as a master ASE tech. The choke helps you start the engine properly. But once the engine is running for a few minutes, it should run fine with the choke fully open. Don Bowman has been writing for various websites and several online magazines since 2008. If the engine is cold the choke shutter should be closed. Do not tighten the choke plate any farther by turning the housing past where the choke closes, or it will not come off soon enough. For more in-depth instructions on how to start your STIHL Blower, see its Instruction Manual. Once it's running, it only runs for 10 secs, or so,before it dies. Bowman has a business degree from Pennsylvania State University and was an officer in the U.S. Army (aircraft maintenance officer, pilot, six Air Medal awards, two tours Vietnam). (2) 2 product ratings - NEW STIHL CHOKE KNOB FITS FS90 FS100 FS110 FS130 41801829502 OEM FREE SHIPPING I'm going to try this it's worth a try. 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