Garden

The trimmer will idle fine but when give it gas to start trimming it bogs down and will stall out. I have changed the plug, cleaned out the carb, replaced the fuel filter. What is next??
Experienced gardeners share their insights in answering this question :
When 2 cycle engines preform as you have stated…the main problem is a carbon build up on the spark arresting screen on the muffler, it needs to be cleaned or replaced with a new one

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 trimmer engine idles, but stalls on throttle, check the following parts: the gasket, primer bulb, fuel filter, air filter, fuel vent, fuel line, and carburetor. The repair and symptom guide will help you better identify the part needed to be replaced and how.
A clogged carburetor is most commonly caused by leaving fuel in the string trimmer for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to stall.
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.
Checking the Fuel Mix

The most common problem with a strimmer not starting is that there`s a problem with the fuel mix. Double check that you`ve used 40 parts fresh unleaded petrol to 1 part 2-stroke oil (40:1). Check the petrol you`ve used isn`t stale.

The most likely culprit is a dirty or clogged air filter. Issues with your fuel pump or fuel filter can also cause your engine to idle then die with any throttle. If you have an older car, it could also be a bad carburetor.
When your trimmer starts and runs on choke, it could be because the check valve in the gas cap is clogged. Start the trimmer and gently unscrew the gas cap halfway off. Turn the choke off and assess. If the engine is still running, that means the gas cap may be the culprit.
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.
If you realise that your mix isn`t right, the best thing is to stop your machine and drain the fuel. Mix some fuel that is at the correct ratio, clean any air filters and make good. If it is an incorrect mixture over a prolonged time then it`s not good news.
If you see a weak stream or nothing at all, then you could have a failed pump, a blocked fuel line, a clogged fuel filter, or an empty gas tank. Check the fuel pump pressure. Attach a fuel pressure gauge either to the fuel line at the carburetor or to the pump outlet then crank the engine.
When the ratio of air to fuel is too high or too low, the motorcycle will die when you give it throttle. This loss of power can also be caused by a dirty air filter, worn ignition system, or clogged carburetor jets, among others.
Get your can and spray the liquid on the carburettor. Make sure you don`t go overboard with spraying the liquid as it may end up harming the device. Rest assured that WD-40 is potent enough to work its magic even if it is sprayed decently on the carburettor.
When your trimmer starts and runs on choke, it could be because the check valve in the gas cap is clogged. Start the trimmer and gently unscrew the gas cap halfway off. Turn the choke off and assess. If the engine is still running, that means the gas cap may be the culprit.

Discover Relevant Questions and Answers for Your Specific Issue

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My hedge trimmer will not start… Put in new gas
ANSWER : It’s not getting gas, due to being gummed up with old gas. Remove all of the old gas and mix up a batch of fresh gas&oil. Also get some carb cleaner. Put just a little of the gas&oil mix plus an equal part carb cleaner. Try to start it just to work the new mixture through the carb. You might use the spray start to help pull the new gas through. If it fires up on the new gas&oil&carbcleaner mix, shut it off and let it sit for an hour or two. Drain it out and try just a little gas&oiil without the carb cleaner. If all is well fill the tank. If not, repeat the whole process. If you can’t clear the gum this way you may have to remove the carb to clean it.
Good luck.

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Gas leaking out of center hole on gas cap sears weed trimmer 358795150
ANSWER : I had same problem and got a replacement cap at a small engine shop. Seems there is a baffle in the cap to allow the tank to vent and to close off to prevent fuel leaking. Appears rubber baffle deteriorates over time.

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Weed eater starts but won't stay running – Weedeater 19 in 25cc Gas Hedge Trimmer
ANSWER : Probably “gum” and “varnish” build-up clogging the TINY passages [called ‘galleries”] inside the carb!

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Will cut off after five min of running .does it need a new coil
ANSWER : Check gas cap first for vent being plugged as this will create a vacuum in the tank and prevent fuel delivery. Test when problem occurs by immediately loosening cap and retightening to see if restarts right away you might even hear air going into the fuel tank.
If it doesn’t restart, possible coil. Coils are usually affected by the increase of heat when running having too high resistance in the electrical windings or possible moisture.

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Trimmer starts and runs for 15 seconds and stops. won’t start for a few minutes and does the same ,
ANSWER : Check the air filter, replace the fuel if it is last year’s, clean the spark plug or replace. Also lube the blade. Good luck…Lee

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Hedge trimmer put away for winter. will run but not stay running. put in new diaframs for carb . same results. i am questioning the gas cap now. is it possible that it can cause a problem with keeping this trimmer running Paul
ANSWER : YES, this system relys on pressure and the ionic nature of gasonline to pull the fuel through the system. If the gas cap is off or damaged where a seal is no longer possible, try taping it up with duct tape and see if that helps

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Can not get spool head apart to change line, tried pump pliers, pipe wrench, won’t unscrew!!
ANSWER : If you are sure that it screws on it may be a reverse threaded unit..

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Bad Carb After starting the engine on my gas powered 31cc 2-cycle trimmer, I cannot get any power. Every time I pull the trigger to give it a little gas, the engine dies. It will idle ok, but then quits when I give it gas. I have primed it plenty and there is gas in the thing.
ANSWER : Check the fuek lines for hole and leaks, check the fuel filter and clean if necessary. remove the carbuerator and inspect the gasket; it should be soft and flexible, if it seems hard or brittle replace it. clean the carb with carb cleaner sray (available at any local auto parts store) and compressed air. make sure you get inside the small fuel rail holes. also check the primer bulb for pin holes and proper seating/seal. if that doesn’t work have the carb repaired at a service center or replaced.

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