Chainsaw Repair

The link that was posted to the carb exploded view. I have that same pdf except in the menu it doesn't have what 21A and 45 are. Everything else is the same but those two are omitted and that's why I posted the question here. Here is the one I have and as you will see those are omitted completely. http://www.ereplacementparts.com/walbro-hda1441-carburetor-parts-c-139716_142756_139896.html

Giving an update as to where I am with this. I clipped off the tabs from the limiter caps as suggested. I tightened the idle adjustment in all the way and did the same with the H and the L. I then backed them all back out 2 full turns. After this didn't work I adjusted each one like this below.
H 1/2 turn
tried to crank it. At least 4 pulls choke on
L 1/2 turn
tried to crank it. At least 4 pulls choke on
Idle 1/2 turn
tried to crank it. At least 4 pulls choke on

again
After second time I waited 30 minutes in case I had flooded it.
Then I repeated it all again and kept doing this till I had gone what I knew had to be way to far.
The next day I repeated the same process. except this time I didn't have the choke on but I put the toes of my shoes into the handle so it pressed the throttle trigger full open. After a couple of adjustments it did fire up several times. But even though I would hold it and rev is up a bit I couldn't keep it running long enough to try and adjust the screws (Idle, H, L) to see if I could get it adjusted. As long as I kept my finger on the trigger it would stay running but if I let it die down some it would cut off.

So I decided to (I put this plug in last year) regap the spark plug, cleaned the plug. I changed the gas (new mix and all) and the oil. Put a new air filter in. Didn't have a fuel filter but I think it's ok since it did crank and run.

I retried it again and it cranked but did like it did earlier. Plan to tinker with it more today but I think I will have the same results as before. Am I leaving something out here.

Your situation sounds just like a 257 I tuned up for a buddy last summer. I had a hell of a time getting the carb adjusted right. It turned out the idle screw needed to be WAY in to get it right. Maybe the spring was just worn, not sure. Couldn't get it to start unless holding the throttle until I got the idle right. Turn the idle in then turn both the L and H in to lightly seated then back them out around 2 full turns, maybe little more. I'd bet it starts on first or second pull. It will idle high but you can then back out the idle screw some until the chain stops. Then fine tune the L and H to get it right. Hope this helps.

I will try it the suggested way. I put a new carb in last year about this time. But it ran fine most all summer. Toward the end of the summer it started doing what I have already said about running then like after a tank of gas I couldn't get it to run unless I let it sit a while like it needed to cool off. Around September I just started using my wife's saw. Hers is smaller and goggs down on bigger cuts and I decided with summer close I needed mine working, thus here I am.