Choke on my poulan chain saw will not lock in place

SOURCE: 2375 poulan chain saw brake is shot,how do I fix it?

You Likely by this time have resolved this. Mine messed up one day and I found a spring inside it. This spring wraps around the counter weights and pulls them together at idle speed, allowing the chain to stop, without stopping the motor. As you throttle it up and the RPM increases the spring allows the weights to push outward , engaging the chain. I have used mine without it, but I'm sure that would not be a recommended procedure, as the chain is always engaged, even when idling.

SOURCE: poulan Super 1800 16" chainsaw .

Hi dortfran,
My name is Dennis and I hope to be of assistance.
This sounds like a kink in the chain and I would try a new chain because this can be a very small kink and very difficult to find and straighten out. If you must put the chain saw in a vise by clamping the bar and run the chain back and forth from the sprocket to the bar grove under operating tension and locate the misalignment at the bargrove. Now you have located the problem but the fix is still sweat away, and with some luck you may be able to spring the chain straight and have the link flexable to opporate without a hitch.
Glad to be of assistance. Please rate the solution because i can learn from your rating.
Thank you
Dennis

SOURCE: poulan pro series chain saw 20" bearings seizing up on bar

There's a tiny hole on the front of the bar near the bar sprocket. This is used to grease the sprocket. If you go somewhere like Lowe's look in the chainsaw section and you'll find a grease tube that is specially designed to lube the front sprocket. Before lubing use a small wire to clean out any debris from the whole. Press the lube tube against the hole and push repeatedly until grease comes out from the outside of the bar. This should greatly extend the life of the bar.

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.