I have a homelite 3316c when it starts up it goes full throtle it doesnt idle right is there a idle screw

Turn H and L jet screws all way to right back each one out 1 1/2 turns. Start and hold full throttle, adj. H for maximum speed then adjust L so it will idle and have very little hesitation when sudden increase of throttle. Once this is done you may have to adj. H a bit more for maximum speed.

I would think that either throttle is hung open where the choke mechanism didn't release it or the throttle butterfly is missing.

Make sure all the cables and moving carburator parts are clean and move freely.

ok check the magneto if rusty clean with fine grit paper then try it if not then may be time to change the coil and magneto..

Lossen the bar and pull it out to adjust the chain tension

Regarding the adjustment procedure you generally start your low and high mixture screws at one turn from seat, or slowly turn them in all the way until they bottom out and then back them out one full turn. You will adjust the high speed mixture screw at full throttle and get the median point between too rich (loads up) and too lean (dies out). You will want to do the same thing with the idle mixture screw, just adjust at idle rpm. You will also adjust the low idle mixture screw to give you a smooth transition from idle to throttle up. Once this is obtained, you adjust the third or idle speed screw low enough so the chain does not turn at idle rpm but high enough so the saw doesn't cut off. Hope this gets you going.

adjust the high speed screw first with the throttle at full speed, then adjust the idle screw to maintain idle speed

the smallest piece of trash will cause you the biggest problems. try blowing the carb out . i think it has a pre set idle on it.

i have the same problem with a 45cc 18 inch chain saw oh it is a homelite any help

Fuel restriction could be dirty in tank filter, or high idle screw needs to be adjusted. Do this by turning it counter clock wise 1/8 turn at a time start and check for improvement after each adjustment.