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Stihl fs38, full throttle when i try to trim, motor bogs out on me

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 47 Answers

SOURCE: issue wont run on full throttle, bogs out

check the spark arrestor in the muffler for a clog

Posted on Feb 08, 2009

  • 279 Answers


Look to see which one has a worn spot . That is the one I would use. If it isnt that one, try the other. Good luck...Lee

Posted on Sep 24, 2009

  • 677 Answers

SOURCE: i have stihl chain saw it runes full throttle

After you let off of the throttle it dies instantly or just kind of quits slowly ?
It could be :
- 1 ) Your clutch is hanging up and not allowing the engine to idle while the chain is not moving.
- 2 ) You need to set the idle higher. You will need to remove the air cleaner, and find the small idle adjustment screw, and turn the screw clockwise, until it idles.
Please let me know.

Posted on Feb 08, 2010

  • 36 Answers

SOURCE: weed eater bogs down when i try to give it full

have to adjust the high on the carb. should have, 3 screws, 2 that are together is your h for high, and L for low. the one by itself is for idle. when mackine is running, squeeze throttle and adjust the high til it clears up, if it stalls real fast, back counter clockwise while off, and try to restart it, if worse, go the other way. i do mine by 1/4 turns. keep count of turns in case your going the wrong way! hope this helps!

Posted on Sep 22, 2010

  • 111 Answers

SOURCE: trying to find an ignition coil for a Stihl FS38

I would go to the dealer locater on the Stihl USA website. And see if you can order it from your nearest dealer. If they can no longer order the part in for you, then I would look on Ebay. There are a large number of dis continued parts on there.

Posted on Apr 05, 2011

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Fs38 Stihl weed trimmer extremely very hard to pull with sparkplug in but no problem with no plug.

A hard pull on that unit would indicate a sheared flywheel key. The key is part of the flywheel. Check to see if there are 'rub or scrape' marks on the outside of the flywheel. Adjust coil clearance to .010". Coils on those models are normally very reliable. Use a spark tester for lawn mower engines. Preferably with a light in the center of the tester wire. If it its an adjustable tester, adjust the gap to at least .065 to 0.85". The light tester should produce a bright orange light, the adjustable tester should produce a bright blue spark. I cannot find specs on those models, as dealers use the 'light in wire' type tester.

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inside the muffler there is a screen that gets all gummed up, take muffler assy. apart and clean screen, if you have a propane torch, this works well as you burn crud off it becomes ash and wipes or blows off. first link shows how.
press the helpful button and follow me on fixya

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Heres the illustrated parts diagram showing the beakdown on the handle and location of the trigger mechanism. If you want the full parts manual, i can send it to you. :)

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I googled your fs38. It is a Stihl FS38. The first sight on the search comes up with an 82 page operating manual from
This should help.
Good Day.

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Look to see which one has a worn spot . That is the one I would use. If it isnt that one, try the other. Good luck...Lee

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Stihl leaf blower motor dies when i try to give it full throttle

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1 Answer

Issue wont run on full throttle, bogs out

check the spark arrestor in the muffler for a clog

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