20 Most Recent Craftsman 27cc 2Cycle Full Crank Curved Shaft Weedwacker Gas Trimmer () Questions & Answers

I have a yard works trimmer and it does the same thing. To keep it running i have to put the choke at half way on. I took it back to the store where I bought it and they made some phone calls. The outcome is they said the controls are set up for the country where they make it. this country is very high and the atmospheric pressure is a lot different than ours. His advice to me was if I am happy with it working that way just keep it. So far it starts and runs good but it has to be choked all the time half way.

SearsPartsDirect

go google and type in --workshop manual for craftsman trimmer -- and down load any pdf version for it in reality most centrifugal clutches for trimmers work the same so any one manual for any make would give you insight on how to do it if craftsman don't supply a pdf version for download

Carburetor needs a slight adjustment, but may need special tool for this.

I need to ask. Did you leave fuel mix in it for a long time? If so then the carburetor will need to be cleaned with a special cleaner. and not the spray can stuff.

needs new gas lines and carb,go to ebay and get them it is about 25 bucks,or you can rebuild the carb and buy a new line and fuel filter,ethanol kills weed eaters,use non ethanol gas from a marina

I have had that kind of problem myself many times. Its just one of those things that 2-stroke engines just seem to do at times. I always do the easiest possible problems first and then progress to the more involved and expensive problems next. First: I'd recommend replacing the Fuel Filter, and the Air Filter. as Fuel Filter gets partially clogged it restricts the flow of gas to the carburetor, so when the trigger is pulled, it immediately is starved for gas and stops. When you replace the Fuel Filter always examine the fuel line for cracks or deterioration. Also, it is always a good idea to replace the Air Filter too. If after replacing the Fuel Filter, and the fuel line, if it needs replacement too, try starting the engine. If the problem persists, we'll move on to the next possible problem. Second: The carburetor has two adjustable jets, one is typically marked High, and the other is Low. You will need a special tool that looks like a screw-driver that has a splined female end on the end, that will allow you to adjust the carburetor jets. If you don't have one of those tools it pays to get one... Amazon typically sells them for Poulon products (which is commonly used by Sears). Once you have the tool, slide it over each jet, with the engine off, and then CLOSE each jet until it is lightly snugged down, and keep track of where the tool is (I mark mine with a marker line on the tool's shaft), and slowly open each jet 2 turns. (with a 27 cc engine somewhere between 1-1/2 turns and two turns is a good starting point. I typically start with 2 turns to make sure there is good gas flow, and the engine will tend to run rich, but it should run.) Once this is done, try starting the engine again.... Make sure it is idling well, and then pull the trigger, if it doesn't quit on you, you've solved the problem. The most you might need to do is slightly turn each jet in about an 1/8 turn to fine tune the engine mixture. If you close the jets too much, it won't run well again, and will starve for fuel again. Keep the jets balanced and it will serve you well. Third: If that doesn't work either... Its time to get into the carburetor itself. I've tried rebuilding these carbs, and they are a pain, and by the time you purchase all the necessary ingredients, it costs more than the trouble is worth. I typically find an identical replacement carburetor from RepairClinic.com, Amazon, or even this site, etc. and just buy an exact replacement carb. Its fast, easy to replace, and will solve a host of problems, and you won't have to experience spending a day looking for one of those tiny rebuild-kit springs that flew across the garage floor. Don't ask me how I know this. I hope this info helps you. Good luck.... Rayko

Probably time to rebuild the carb and also check the air filter.

Check age of gas. Cannot be more than 30 days old. Make sure to use fresh gas w/synthetic 2-cycle oil @ 40:1 ratio (1 gal.) Gas to 3.2 oz. Oil). Do not use old or stale oil/gas mixture. Always use the proper oil/gas mix. If you do not, your engine will suffer rapid, permanent damage. May need to clean or replace carburetor.

Check age of gas. Cannot be more than 30 days old. Make sure to use fresh gas w/synthetic 2-cycle oil @ 40:1 ratio (1 gal.) Gas to 3.2 oz. Oil). Do not use old or stale oil/gas mixture. Always use the proper oil/gas mix. If you do not, your engine will suffer rapid, permanent damage.May need to clean or replace carburetor.

Hi michaelHere are a few suggestions to help get your weedwacker running properly.***************************************************************************Make sure you are getting spark at the spark plug, to do this:Remove your spark plug and check to be sure you are getting a bright blue spark at the spark plug.You do this by grounding the plug on the head of the engine and pulling the crank rope...watching the plug for spark.If you are getting a nice blue spark then skip A below and go to B. A...If you do not get a nice blue spark then you may need to replace the electronic module.Note: If you have to replace the module be sure to measure the position it is in and be sure to install it in the same position Normally the clearance is around .10 thousandsandsAlso write the measurement down on a piece of paper for later reference, this measurement is critical to starting of the engine later. B...Also take some fine grit sandpaper (not emery) and lightly sand the flywheel where the magnet is located to clean any rust or corrosion from the magnet area.You can also try to lightly sand the module metal face to increase the possibility of ignition of the old module before replacement. *****************************************************************************************************************************************************************Sounds like you have dirt/debris in your caburetor jets,fuel passages or a diaphgram that is becoming non-flexible. Check/Clean/Replace your Air Filter, a dirty air filter can make your engine run to rich with fuel.Also be sure to check and clean your spark arrestor in the exaust,if you have one installed on your engine. Note: ALWAYS USE COMPRESSED AIR TO CLEAN YOUR JETS AND PASSAGES, VERY IMPORTANT. Note:Before you disassemble the carburetor:Write down on a piece of paper or take a picture of how the linkage attaches to your carburetor for later reference when you go to reinstall your carburetor.Mark each piece with a awl, or some kind of instrument that will make an alignment scratch before you disassemble the carburetor into separate pieces.That way you will know which way it goes back together when you reassemble it. Sometimes you can get by with priming the carburetor or by using a very small shot of starting fluid and letting it run a few times like that, and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.Be sure to check your fuel tank for water and dirt/debris, if there is water/debris then you need to clean your tank.Check you fuel line condition after a while they will degrade and need replacment. Check/Clean/Replace your fuel filter if you have one, normally they are located in the fuel tank of chainsaws and weedeaters.When you remove your fuel lines from the carburetor be sure to make a drawing to how the lines are connected to the carburetor or take a pictue for later reference.Normally the big line will be the line the fuel filter is connected to inside of the tank.The smaller of the two lines is the return to the fuel tank from the carburetor after it is pumped thru the carburetor by the primer bulb.Make sure you are using fresh fuel...and oil if your using a two cycle chainsaw or weedeater with the oil to the right mixture...too much oil as it can cause hard starting and excessive smoking.If the chainsaw/trimmer is over a couple of years old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.The diaphgram may look good and flexible, but it can be deceiving and not act as a fuel pump as it should because it has become too hard and will cause hard starting,start and run and shut off, etc. When you clean your carburetor, I recommend that you use a laquer thinner type cleaner to clean and dissolve the laquer build-up in the float and needle jet passages.Be sure to remove all plastic and rubber parts before using the laquer thinner because it can dissolve the plastic parts and render them unuseable.Be sure to use COMPRESSED AIR to blow out all the fuel and air passages.The higher air pressure is needed to blow some of the trash/debris from the fuel or air passages.Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.Keep in mind that the float (if you have one) for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit, or you could also ask the parts man that you get your kit from.When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.Be sure to mark the turns down on a piece of paper.That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their original position before you started.Note:The little spring inside of the carburetor goes under the float arm.That is where your fuel inlet needle/float valve is located...on the arm at the end.Normally there is a small indention in the carburetor base and a small protrusion on the underneath of the float arm where the spring will be in the right postion for installation.The spring will set in the indention and you will install the float arm with the needle/float valve and float rod into position over top of the spring,you will push down until it is in position and then you can tighten the screw that holds the float arm assembly in position.Once you have your carburetor cleaned/rebuilt that should solve your problem.Please take time to rate me Bud

pull off string housing check that all parts are there. run machine and see if shaft is turning-- if it is then put housing back on sometimes I havent put the housing on properly. if shaft is not turning. then repair is needed. or just buy a new one. cost of repairs on this stuff is not worth the cost. unless it's a profesional grade machine..

jerry is correct. these small machines are as tempermental as an electrical system on a car.or one that won't start. IT can be one of 5 or 6 problems. you just have to go through the thing one step at a time. I prefer do look at the cheapest thing first.and then work your way up.

Hi and welcome to FixYa, I am Kelly.
Craftsman manuals are avalable for all models on this site:

http://www.managemylife.com/mmh/owner_manuals

You must have your model number

Note the model numbers on this page:

http://www.managemylife.com/mmh/owner_manuals/search/product_type.Line%20Trimmers:Weedwackers,%20Gas?query=27cc+Craftsman+trimmer

Once you enter your model number you click on "Get Manual" and then save as to your computer.
Thanks for choosing FixYa,
Kelly