Using a black and Decker gb155 whipper snipper how do I adjust the high/low carburetor adjustment screws properly? And how do I replace the line so that it stops breaking

Question edited for clarity, and add MAKER, took me ages to work out what 'adjust the cab' was!
Question moved to make model category.

Information and videos in the link

https://www.google.com/search?q=stihl+fs38+weed+eater+carburetor+adjustment

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Good for you

Try jack small engines

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 help s!

Too long to print here. Go to the zama web sit and they give you a wonderful procedure for adjusting a zama carburetor. Especially important after you have taken it apart and installed a new carb kit. And even if you get a new carb the initial settings are so called defaults and you should really fine tune the carb for your specific motor.

Hi Robert:
Before you remove or try to adjust your low and high speed jets you should always count the number of turns it takes to lightly seat the idle mixture screw and high speed needle adjusting screws.
Be sure to write the number of turns down on a piece of paper so you will know how many turns from the seated position to open the jets when you go to reinstall them, or if you remove them for cleaning or replacement.
If you have aready tried to adjust them then the adjustments below should get it running for you for final adjustment when warm.
Normally you will adjust your idle jet to 1/2-3/4 turn open from the bottom seated position.
Then you will re-adjust the low speed of the engine when the engine is warm by turning the idle screw in or out till the engine runs smoothly at idle speed, around 1200 RPM.
The high speed jet is adjusted to 1 1/2- 1 3/4 open from the bottom seated position, after the engine is warm.
Then re-adjusted by turning the High Speed jet adjustment screw in or out till the motor runs smoothly at high speed.
Alway use the "lightly seated" method if you have not changed the screw settings.
Bud

Hi you need to take the carby off for cleaning
Take carby fully apart,
Remove the low & the high adjust screw blow air down all small holes & jets.I had the same problem with a Whipper snipper done this & it fixed it.

50:1
Farmerbear

You can find a manual here:
https://www.manualslib.com/manual/807316/Black-And-Decker-Gl650.html#product-GL670