Craftsman Convertible 25cc. Gas Line Trimmer - Answered Questions & Fixed issues

Check that there’s spark. It may be the ignition armature.

Fuel lines probably need replacing. Have you been using ethanol? The alcohol eats the fuel lines on most 2 cycle motors up.

you dont,y7ou need to get the adapter that came with the universal head,if you try to take more than the head off,you will damage it

Make and model, engine size please.

Diaphrams can be tricky sometimes...seating can be irritating. If carb disassembled and cleaned out...might have to check adjustments. Make sure screw didn't get loose. I had one do that before when governor broke.

U-tube has some good videos on all sorts of replacements on heads , lines...etc.

Those little carbs clog very easily and what you experience is a common symptom. Go to any bog box home store and in the mower area pick up a can of small engine carb cleaner. Remove the carb, take it apart as far as you comfortably can and soak all pieces in a can/jar of CLEAN gasoline for 10 -15 mins. Agitate to get the gas moving. Remove the carb, and drip clean then use the carb cleaner to blow out every port you can see. reassemble and install the carb, it should work fine. Before storing for the winter drain all gas from the tank and start it allowing the machine to run till it stalls out due to no gas. You should be fine for next season that way.

need new carb... Primer plate is bad. They will run without it working. Your idle problem is separate from this issue. Fresh fuel/oil mix might help. Some Stihl carbs we just replace because they are cheaper than trying to rebuild...

The fuel lines you're getting in the kit are the proper ones. The only problem these fuel lines have is dealing with gas that has ethanol in it. The ethanol degrades the fuel lines, primer bulb and some seals in the carburator making them very soft (mush) and eventually fall apart. Most outdoor power equipment fuel systems are not made to deal with fuel with ethanol additives. Sorry but if you can't find gas without ethanol added in your area, you'll have to keep some extre fuel line around.

If you removed the fuel lines from the primer bulb you may have reversed the lines. On two stroke engines the primer pulls gas through the carb it does not push gas into the carb. On the back of the primer bulb there are two hose barbs, one says in (in very small letters) this side goes to the carburetor and the other goes to your gas tank (it is a return line) This line is about a third to a half way up the side of your gas tank, not at the bottom where the fuel line is.

What model trimmer do you have?

Larger

Here's a link I suspect will help: http://www.youtube.com/watch?v=6FcFkbxhAXU

Two things which may be the problem: 1) carb need to be rebuilt or replaced, and 2) you need a new spark plug. The carb with shipping is around $50.00 from sears ( http://www.searspartsdirect.com/partsdirect/part-model/Craftsman-Parts/Grass-trimmer-weed-wacker-Parts/Model-3167918602008/0247/1503820/P0805032/00001?blt=06&prst=&shdMod= ) A sparkplug can be had at any small engine repair shop and most auto parts stores for less than $5.00 Start with the cheap solution... Also make certain you have fresh gas and that the oil mix is correct.

Try searspartsdirect.com You'll need the model number... plug it in and you should be able to pull up a schematic.

Get the model number off of the trimmer and go to this website: www.searspartsdirect.com You will be able to look up a schematic for your trimmer which will help.

It may be that the drive shaft is broken, or not engaged to the engine. Make sure the trimmer attachment is locked all the way onto the shaft coming from the engine. If it still doesn't work, check by seeing if any of the other attachments work when you put them on. If they do, you know the drive shaft in the trimmer attachment is probably broken.

Hi davemac918...
I used a long pair of tweesers to grab the filter, but you can also grab it with a piece of wire with a hook bent on the end of it large enough to fit the tubing the filter is inserted into.
Hook the filter tubing, and pull the filter to the top of the tank and manuver it out of the tank.
Please take time to rate me

Older units use a 40:1 mix while very new units use a 50:1 mix. I don''t know the age or model you have. Using 40:1 will NOT hurt a 50:1 machine. Here is a mix chart. Just 1/2 the stated ratios for a 1/2 gallon premix. 40:1 is 3.2 ounces/gallon of gas. Use half of that to make a half-gallon.

http://support.mtdproducts.com/app/answers/detail/a_id/347/~/two-cycle-engine-fuel%3Aoil-mixture-chart

I had the same problem. it is the clamp that your attachments go into. mine slide down a bit and the inside cables didn't engage. loosen the bolt on top and slide it back up. then secure bold again. if it keeps happening it is only a $6 or $7 dollar part.