stihl trimmer starts, idles well, dies when triggered

crp0499June 8, 2013

I have a stihl pro trimmer. It starts fine on the first pull. It idles well, but when I squeeze the trigger to speed it up and use it, the trimmer dies.

what might my problem be?

Thank you for reporting this comment. Undo
rcmoser

Well, I have stihl blower less than two years old and it done the same thing...Come to find out that the muffler screen was plugged not letting any exhaust gasses out.... Look at the muffler and unscrew the bolt looking thing with the hole in it. When you get it out you will see a screen attached to it that come out when you unscrewed it from the muffler... Take torch and Burn the carbon off the screen so exhaust gases will now flow out the little hole... May not your problem but I would make sure it not that for I would do anything else????

    Bookmark   June 8, 2013 at 9:44AM
Thank you for reporting this comment. Undo
rosemallow(z7 Md)

When it is idling the clutch is dis engaged, When you hit the trigger to speed up the clutch engages.Maybe the trimmer head is jammed up.
Kind of like trying to drive a car in front of a brick wall.

    Bookmark   June 11, 2013 at 7:28PM
Thank you for reporting this comment. Undo
ggoyeneche

Could be clogged muffler, and could be tight trimmer head, but my money is on gummed carburetor. You probably need to disassemble, soak the carburetor, and install a kit, or replace the carburetor. Also suggest replace fuel lines, if they aren't already so hard that they break when you remove carburetor.

    Bookmark   June 14, 2013 at 4:37PM
Thank you for reporting this comment. Undo
frontiercc(MD Zone 6)

I'm with ggoyeneche-

I have a Stihl FS55 trimmer that had the EXACT same symptoms last year. I believe due to the Welch plug coming loose inside the carb.

Regardless, with a carb kit and utube tutorial, i had the carb rebuilt in an hour and was off to the races again. Carb kit is cheap and I bet you a donut it'll fix your problem.

Be sure to take your carb off the trimmer and take it with you to the Stihl dealer. They use different carbs and the make / model / serial #s are important to make sure you get the right kit.

    Bookmark   June 18, 2013 at 3:30PM
Sign Up to comment
More Discussions
Craftsman Snowblower Recall
Did anyone else receive a recall notice in the mail...
pjrsjr
2-cycle engine troubleshooting
My 2-cycle blower cannot be started. There is a hot...
slim50
Reciprocating Saw
I am looking to buy a reciprocating saw. I am not looking...
pirate94
Poulan Pro rear tine tiller, burnt valve??
I have a 6.5 Intec Briggs on my tiller, which is 10...
slowpoke_gardener
Older Troy Built Tiller Model ID
Trying to indentify model number of my unit. It is...
gardenerfrank
© 2015 Houzz Inc. Houzz® The new way to design your home™