Pic. of the type I have in leftovers. Mostly from Lombard and Homelite. The hook fits around the pawl and the tail rests against a flywheel fin. Eye part goes over the pivot stud boss. Preloads the notched end of the pawl against the end of the crankshaft.
The ones on the top right look like what i have on the SXL. I can try what i have and provide info. On the SXL it looks like you take the nut off and the spring just slips off. On the 4000 I had to try and unwind it as the stud is pressed or cast into place but it was already damaged so I did not see any harm. What is the best method to remove and install them on the Poulan without over stressing them?