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Put on a pair of safety glasses. Remove the fuel cap from the Weed Eater and set it aside. Fill the fuel tank with unleaded gasoline that has been mixed with quality 2-stroke oil in a 40:1 ratio. Replace the fuel cap.
Move the Weed Eater to a safe place and lay it flat on the ground. Depress the fuel bulb located beneath the carburetor approximately six times to prime the engine. Press it slowly so that fuel has adequate time to traverse the fuel line.
Slide the handlebar-mounted engine "On/Stop" switch to the "On" position. Slide the choke lever beneath the fuel tank to the "Full" position.
Depress the "Throttle Lock" lever located beside the engine "On/Stop" switch. Keeping the lever depressed, squeeze the throttle trigger. Release the throttle lock. This sequence holds the trigger in the depressed position, which aids in starting the Weed Eater.
Roll the Weed Eater so that it is resting on the engine and the trimmer head shield only. This will allow the spinning trimmer head to avoid contact with the ground. Brace the Weed Eater by holding it to the ground with one hand. Using your other hand, pull the starter rope quickly until the engine begins to run. Do not pull the rope more than a dozen times. If it fails to start by then, squeeze the throttle trigger and continue to pull until the engine starts.
Allow the Weed Eater to warm up for about 15 seconds, then slide the choke lever to the "Off" position. Let the trimmer run for another minute without touching the throttle lever. After the Weed Eater has warmed up, squeeze the throttle trigger once to disengage the throttle lock. The trimmer is now operational.
sounds like the ethanol gas messed up your carburetor. Gotta hate this gov't mandate to use this hazardous fuel. 10% ethanol =10% gas mileage reduction.
Stihl wont warranty any of their products that use ethanol gas. They want you to buy this very expensive 'REAL GAS' about $7 a quart
To lock the choke on:- 1. depress dead mans trigget on top of back handle 2. squeeze throttle trigger fully in. 3. slide on switch fully down to 'full choke' position. 'it should stay there'. 4. Pull saw over until it fires once. 5. click 'on' switch up one position to 'half choke' 6. pull saw over again, saw should start running and be revving high. 7. 'blip' throttle, saw should stop revving and run on tick over.
Full choke, stop switch on run. Pull rope handle 3-4 times or more until it "tries to start" (it will not start, but it will try to for a split second) move the choke lever to the half-choke position and without pulling the throttle, poll the rope handle until the engine fires and runs for 4-5 seconds then fully open the choke to the run position, let it warm up for 25-30 seconds (don't forget to let it cool down about 45-60 seconds before you turn it off!) and then proceed to use it.
The Stihl FS45 has a particular way of getting started as do all the stihl products. We sell Stihl equipment in our store and service and repair them also. The normal starting procedure is to: Be sure the switch is turned to the ON position which is the negitive sign (-). The (O) is the off position. Press the primer bulb 3 times. Move the choke lever to on. Pull the starter cord three times only. If the engine fires, turn the choke to the off position and pull till it starts. If the engine did not try to start during the first three pulls with the choke on, you must turn the choke off and pull till it starts. Remember:Pulling more than three times with the choke switch on will flood the carburator on every stihl product thats on the market. However, if the units still refuses to start, being its new and still under warrenty, return it to the repair shop that services Stihl products and they will repair it according to warrenty. All parts and labor should be honored at no cost to you. Please provide your receipt and serial number located on a silver tag located on the unit or the mechanic will get it off the unit when he works on it. Either way, it will most likely have to have a new carburator put on it. I hope this helps. Please comment back if this was helpful. Thanks; George
hello sir, my machine will only start when pumping primmer bulb or squirting fluid in the carburetor than stops. the fuel line has broken off, in most small carburetors this is a ongoing problem.old fuel will crystallize when left in tank for a long time.plugging up ports, fuel lines, small screen in carburetor.fuel lines will dissolve clogging carb.this is why it will run when the choke is on creating a vacuum to where there is fuel forced in the carb to rum,also the gas will evaporate leaving the oil behind clogging up carb.the thing to do is remove carb. and clean out,replacing gaskets or fuel line if necessary.use carb cleaner to clean out carb.make sure to make note where fuel line go.the fuel filter broke off of fuel line letting debris get in carb plugging it up.the muffler is known to clog up a lot on these machines where they want run. the compression should be 60 to 120 lbs any thing below 60 is junk. when adjusting the carb screws turn in all the way than turnout 1 1/4 turns turn in slow until machine runs also you need to check for spark by removing plug and grounding against engine to check spark, ok.a new spark plug would be a good ideal too , if you are going to make these repairs use new fuel line and filter,hope this helps,any comments welcome,thank you, @@
Not a great Stihl fan, however they usually have a single stop start, choke and half throttle lever, depress the throttle trigger and at the same time pull the lever fully uplet go of the throttle trigger which should now be lock up, this will engage the part throttle and choke, crank the machine until it fires once, then move the lever down one notch and crank again until it fires up.
the choke is operated by the fingers on the handle grip...the lever is stop...on...choke...when motor running just flick back up to run mode...the choke butterfly is just a open or closed position in the carb y.
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