o some new gas. I press the primer bubble and the gas is returning to the tank OK. I choke it as per man. instructions and then pull my guts out. There is spark. I took it apart and the diaphram looks OK too. Any thoughts on what might be the problem. Thanks Lee
25cc 2-Cycle Gas Powered String Trimmer #P2500

Experienced gardeners share their insights in answering this question :
Hi ganrattan…

Sounds like you have dirt/debris in your carburetor jets,fuel passages or a diaphgram that is becoming non-flexible. The diaphgram may look good, but is inflexible and cannot act as a fuel pump like it is suppose to.Be sure to check your fuel tank for water and dirt/debris, if there is water/debris then you need to clean your tank.Also 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 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.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.Also make sure you are using fresh fuel…and oil mix if your using a two cycle mower or weedeater with the oil to the right mixture and not too much oil as it can cause hard starting.If the mower/weedeater 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. This is the cause of more than 80% of hard starting cases.Sounds like you will need to clean the carburetor or replace your carburetor internal rubber parts like the diaphgram and O rings.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.Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.Sometimes you can get by with priming the carburetor or using 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.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.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.Once you have your carburetor rebuilt that should solve your problem.

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

If your 2-stroke brushcutter fails to start, the simplest explanation is that there is not enough fuel: in this case you simply need to top it up. A 2-stroke brushcutter engine runs on fuel/oil mixture, which you can buy ready prepared, such as EFCO-Mix Alkilate alkylated mixture in a 5 L can.
Remove the air filter and spray carburetor cleaner into the intake. Let it sit for several minutes to help loosen and dissolve varnish. Replace the filter and try starting the trimmer. If this doesn`t solve the problem, consider disassembling the carburetor to give it a more thorough cleaning.
A dirty spark plug

If the central electrode is covered in dirt this can short out the spark so that it won`t jump to the outer electrode, which will mean you will struggle to start the whipper snipper – you can clean the dirt off with a tooth brush, or small wire brush.

Turn on the ignition switch and pull the starting cord quickly. You should see a spark in the plug gap. Since the spark may be faint, it may help to do the test in a dark area. If there is no spark, check for a broken or shorted (bare) lead wire or bad switch.
You need to ensure the battery is fully charged and the charger is correctly connected during the charging process. Another fault which can cause your Gtech trimmer not to work is the safety switch in the handle. To check it is operating correctly listen for a `click` when it is pressed.
The air filter may be clogged. If the air filter is clogged, the engine will get too much fuel and not enough air. As a result, the engine may not start. If the air filter is clogged, replace it.
Most whipper snipper batteries last somewhere between 20 and 40 minutes, but for heavy use, or tough grass it will be less as the strain on the motor is higher.
That`s where a whipper snipper comes in. Whipper snippers afford the user a more precise cut, and allow access to sensitive (e.g. around flower beds, new plants) and hard-to-reach places. It`s your go-to tool for giving your walkway a clean edge, tidying up under the deck, and trimming grass along a fence.
This can be due to corrosion, scratches or general wear. As a result, the cutting edges of the cutter comb of your blades are no longer sharp, reducing their ability to cut. Sharpening the blade is required to reface the cutting surfaces restore these sharp edges.
2 stroke has fuel and spark but won`t start

You`ve confirmed that the gas is getting to the carb, and the spark plug is properly igniting, but your 2 stroke dirt bike won`t start. The most common causes are a dirty carb or low compression.

2 strokes may have a more erratic idle just because of the way the engine works and the timing of each power stroke. A 2 stroke that doesn`t idle for more than 30 more than likely has the idle set too low or the jetting needs to be corrected.
2 strokes may have a more erratic idle just because of the way the engine works and the timing of each power stroke. A 2 stroke that doesn`t idle for more than 30 more than likely has the idle set too low or the jetting needs to be corrected.
2 stroke hard to start when hot

Maybe your 2 stroke dirt bike starts easy when the engine is cold, but it`s hard to start when it`s hot after riding for a while. This is also likely due to poor jetting. A “band-aid” fix that will help is to hold the throttle wide open when you kick start it.

Discover Relevant Questions and Answers for Your Specific Issue

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Spark plug chart
ANSWER : You sure you have the correct number

Read Full Q/A … : 25cc 2-Cycle Gas Powered String Trimmer #P2500

Starts right up on choke. then run inrun position for a minute and have to go back to choke to keep it running ,then it runs fine for a couple of minutes and have to go back to choke and start all over again.
ANSWER : This happens with the cover off, so not the filter.

Read Full Q/A … : 25cc 2-Cycle Gas Powered String Trimmer #P2500

Why will My weed eater only run with the choke fully on and cant give throttle?
ANSWER : It sounds like the carb needs adjusted. Things can even happen to new weed eaters.

Read Full Q/A … : 25cc 2-Cycle Gas Powered String Trimmer #P2500

How do you fix a broken gas line to gas tank that was previously glued but does not hold and leaks gas to a Poulan GE21 weedeater?
ANSWER : Buy a new gas tank! Are you serious! Or buy a new weed eater, if you can’t live without this one, those models are cheap, don’t waste your time.

Read Full Q/A … : 25cc 2-Cycle Gas Powered String Trimmer #P2500

My mx550 weed eater has a poulan 25cc motor that I can’t get started. It was working OK then it just stopped. I put a new spark plug in and also some new gas. I press the primer bubble and the gas is returning to the tank OK. I choke it as per man. instructions and then pull my guts out. There is spark. I took it apart and the diaphram looks OK too. Any thoughts on what might be the problem. Thanks Lee
ANSWER : Hi ganrattan…

Sounds like you have dirt/debris in your carburetor jets,fuel passages or a diaphgram that is becoming non-flexible. The diaphgram may look good, but is inflexible and cannot act as a fuel pump like it is suppose to.Be sure to check your fuel tank for water and dirt/debris, if there is water/debris then you need to clean your tank.Also 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 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.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.Also make sure you are using fresh fuel…and oil mix if your using a two cycle mower or weedeater with the oil to the right mixture and not too much oil as it can cause hard starting.If the mower/weedeater 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. This is the cause of more than 80% of hard starting cases.Sounds like you will need to clean the carburetor or replace your carburetor internal rubber parts like the diaphgram and O rings.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.Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.Sometimes you can get by with priming the carburetor or using 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.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.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.Once you have your carburetor rebuilt that should solve your problem.

Read Full Q/A … : 25cc 2-Cycle Gas Powered String Trimmer #P2500

What ratio of oil and gas do I mix together? How do you start it? I bought the weed eater used.
ANSWER : If you bought it used, you can bet that they didn’t run it out of fuel before they stored it, so the gas evapoated out of the carb and all that was left was oil, so mix your fuel 8 to one eight parts gas and one part oil, you’ll have to hit the primer botton several times.

Read Full Q/A … : 25cc 2-Cycle Gas Powered String Trimmer #P2500

Weed eater will not run in high speed but will idle
ANSWER : Lack of fuel is my first thought. Check to be sure the trigger control is working at the carb. From there I would suspect plugged fuel line or plugged carb, (most likely contaminated fuel) either way I would suggest someone that knows about these. Hope this helps

Read Full Q/A … : 25cc 2-Cycle Gas Powered String Trimmer #P2500

I have a husqvarna 323L string trimmer. I stored it after running the tank & carb dry for about two years. I fueled it, then started it, & it ran for a minute then died like I turned the switch off. Since it would not restart, I found the fuel filter had broken off the hardened fuel line & it sucked gummy crap out of the tank & into the carb. Failing at cleaning the carb, I finally put a new carb on it & replaced the pump, hoses & filter. It has ran good till this year. I winterized it with stabilizer & left it with a full tank over the winter. The gas in the tank was gone when I got ready to use it this year. I filled the tank with premix, checked for leaks, then started it. It would run fine for about half a tank, start idling poorly (lean) then cutoff & refuse to restart till I refilled the tank. I finally found the tank had cracks & was letting pressure out of the tank & apparently this was causing the carb to lose it’s ability to siphon gas out of the tank. So I replaced the tank which came with new hoses & a filter, which I properly installed to the carb. It cranked right up, but when it runs a half tank, the carb quits sucking gas out of the tank. When I pump to prime the carb, it moves the fuel into the carb, but the pump never gets hard like it does when I prime the carb when the motor is cold. I have to keep refilling the tank, prime, & then it starts & runs until the tank gets about half empty. The new fuel filter is down in the gas tank properly, but It will not run after it shuts off until I refill the tank & prime. I’m baffled. New tank, new hoses, new filter, new carb, & I can find no leaks in the fuel system. It runs strong. The 323L is a two-stroke & it always cranks on the second pull from cold on a full tank. Any ideas?
ANSWER :

Read Full Q/A … : 25cc 2-Cycle Gas Powered String Trimmer #P2500

My name is June Strandberg, and I am a florist and gardener in San Francisco. I have been working in the industry for five years, and I love helping people find the perfect floral arrangement for their special occasions. I am also skilled in troubleshooting and fixing gardening tools, so if you are ever having trouble with your tools, please don't hesitate to reach out to me.