Why my choke want stay out on poulan chain saw

SOURCE: 38 cc Poulan Chain Saw

Since You weren't Model Specific...I assumed you meant a Poulan Pro 38cc, here's a Contact Site for OEM Manuals:
http://www.poulan.com/poulanpro/manualSearchResultsAJAX.do

SOURCE: locate exploded drawing of poulan chain saw

I tried a couple locations and found a site that might help go to psep.biz and it will direct you to the blowup. It also indicated that it needed a type number so have that handy. If this doesn't help let me know and I will research further.

SOURCE: poulan chain saw won't stay running

Carburator needs to be removed and cleaned. 

SOURCE: I need t find an air filter for poulan 306a chain saw

I got 1 hit for your filter, if you haven' already give them a try "Poulan air filter 530023046"
http://www.lawnmowerpros.com/Poulan-Parts-Search.asp
Lou

SOURCE: what is distance from coil to stator 14 in. poulan chain saw

I think you are asking for gap between the fly wheel and the ignition module. A business or index card works great. 0.1 - 0.3 mm. GL
Lou