Mixture screw adjustment al ko kb 4001

SOURCE: ryobi 31cc lawn trimmer carb adjustment

As with all 2 strokes if you have compression and a reasonable spark, you only need fresh fuel with correct oil ratio) and they must go !(as long as you haven't fiddled first and all gaskets are sealing) I start mine by(1) pumping the primer till it is firm,(2) full choke,(3) pull till it kicks ONCE,(4) half choke, pull till it runs,allow to warm up and(5) switch to run (you may need to apply a bit of throttle while pulling as in (4)(or give it a few more pumps if it dies) If all is ok, check that when properly warmed up there is a smooth transition from idle to full revs, if it hesitates it may need the LOW SPEED mixture leaning (clockwise) SLIGHTLY.If it dies the LOW SPEED mixture may need richening(anti-clockwise)(adjust 1/8 turn at a time) Make sure that motor is just peaking at full revs and is on the RICH side of peaking (HIGH SPEED mixture)(this will avoid seizing it Adjust both till it revs cleanly and is JUST rich at full, and idleing nicely and it should start without too much trouble.(If you have fiddled and are lost,-about 2 1/2 turns out from closed on both needles should get you started)

SOURCE: Chain saw will not start

BEFORE YOU DO ANYTHING, CHECK THE
CARBURETOR AND FUEL LINE FOR GUMMY
DEPOSITS. TODAY'S GASOLINES DEGENERATE AFTER STANDING FOR LONG
PERIODS. IN THE FUTURE, WHEN YOU ARE
DONE WITH THE CHAIN SAW, EMPTY THE GAS OUT AND RUN THE SAW TIL THE CARB IS FREE OF RESIDUAL GAS.

SOURCE: Carburetor initial adjustment for Poland 2150

Both about two turns or so. Engine must be warmed up to properly set the running adjustments. H adjustment to get four-stroking with no load, but immediate smooth out with light load (cutting wood). Idle set for smooth idle, but allows immediate pickup from idle when throttle applied.

SOURCE: Toro String trimmer will not start; good spark; getting gas

Hi this would be the only possible solution , The flywheel may have come loose causing the keyway to sheer off this is a common problem the only way to tell is to remove the flywheel and have a look.

SOURCE: I am looking for a tool to adjust the air mixture

yes the EPA has mandated you be trained how to properly adjust the new carbs, Any qualified Husqvarna dealere would be happy to sell you the tool and show you how.