- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Most carburetors on the 2 stroke trimmers are all the same. They are of the diaphragm type. I would like to send you to a tutorial/information tuning page for this type of carburetor. If you do choose to adjust it yourself, pay real close attention to the before and after settings on the screws you turn. These carbs are extemely sensitive and respond likewise. I use an automotive type plastic wire connector lightly tapped down onto the unconventional heads of the L and H mixture screws to turn them. The plastic on the connector will expand a little and grip the screw head to allow you to turn it without any damage to the screw. Please view this tuning guide. http://www.zamacarb.com/tipspage.html
Typically those symptoms indicate the engine is not getting enough fuel, the first thing to check is to make sure the fuel/oil is fresh as over time the gas evaporates and leave a mixture with too much oil. Once you do that start it up and look for air bubbles in the fuel line(s), if bubbles are present you have a tiny air leak and that's all it takes to make them not want to run on high speed. If no air bubbles are present then the high speed circuit is at fault and the carb must be disassembled and cleaned or replaced.
Check and clean your spark arrestor located behind a diverter plate on outside of muffler. You'll need a #25 Torx, or one slot screwdriver and wrench to take the plate off. Clean it with carb cleaner and wire brush and re-install. If this screen gets clogged, it could lead to fuel spray coming out of carb throat. Clean and re-oil the sponge filter while you're at it. Hope it helps!
You have a clogged gas cap. Try this: The next time you run your trimmer and it starts to die, loosen the gas cap. It should start running again. It sounds too good to be true, doesn't it?! Well, give it try. Clear the breathing holes form debris, or buy a new gas cap.
When it starts it is running on the idle jet and when you open the throttle it is being starved of the correct gas/air mixture. Sounds like you have a blocked air filter or fuel restriction. Take off the air filter and try to start it opening the gas slowly. If that doesn't work, clean the fuel tank filter and try again.If that doesn't work, remove the carburettor and clean it with carb cleaner paying attention to any fuel or drilled holes in the body. Blow it off with compressed air and replace it. Ensure fuel tank has clean gas.