Could be flat blade screwdriver, could be Phillips, could be a special tool. Could be plastic covers you'll have to remove to get to the adjustment screws. Depends on the age of the saw. Look on the carb and see. (Special adjustment tools are readily available on places like Amazon and evilbay)
Thanks motormonkey I’ll check it out whenever I get a chance and while I’m thinking about it I also have a echo gas chainsaw that will start up and run fine but the chain on the bar won’t move even though there’s bar oil and everything in it… I know it sounds kind of stupid to ask but possibility that it might be clogged up inside
Sounds like too much air or not enough fuel. Could be kinked fuel line, bad fuel filter, fuel line with hole in it, carburetor out of adjustment, Leaking oil seal/seals, leaking carburetor gasket, impulse hose with hole in it if present.