Scrub,
The following base manual will have your screw torques and some repair info. Doesn't cover your specifically but does in a way as most Poulans are basically the same. The stratified (air head) carburetor came after this manual was wrote so they are not covered.
Also pay close attention to the old piston orientation as is unique as some of the porting is done via the piston. Now it been about 6 yrs since my last Poulan rebuild so I don't remember off the top of head which direction it faces. I just learned to always pay attention on disassembly as for piston orientation. If I am thinking correct the ports faces the carburetor side but make sure on your end before piston removal. I just wish they would mark the orientation.
The image below is of the NCC plated piston(530071883) but plain non plated piston (530071882) is the same design.
Also we do have image size limit of 600 x 600 dpi so most image may require resizing. Plus must be hosted off site by a site like Imgur or similar image hosting site.
When I did the conversion from a non plated cylinder the new cylinder looked so rough I thought it would never work but to my surprise it work better than I thought. It is because some of the nickel of the Nickel Ceramic Coating burns off during the initial break in and leaves only the ceramic coating.
The conversion to the NCC cylinder with plain piston was a project here for a new saw the customer had straight gassed and left it for parts. Originally the 4218 had a plain cylinder and NCC piston. Note the NCC piston will not fit the NCC cylinder. And the plain piston will too loose in the plain cylinder. At the time I spent nearly $100 repairing the saw but since it was myself it was reasonable to have what would have been a $180 saw plus I ws self training myself at the time. Now of course since I got a distributor the costs are considerably less at $51. But at that cost plus my labor most customers still will not repair the saws. Plus it is time consuming to do these repairs and customer don't care about anything other than the final cost is less than a new saw so I only do these repairs for myself. Now more expensive saws customers will do it at times.
Poulan Chainsaw Repair ManualSome service manuals for the Poulan saws are rare. Now the Husqvarna 135 chainsaw very similar but its service manual is on a as needed basis and I can sent it by email upon request. Both manuals will help out on understanding of the repairs of the Poulan saws. Besides not every Tom Dick and Harry needs access to Husqvarna chainsaw manuals.
The truest measure of society is the how it treats its elderly, its pets, and its prisoners.
a little bit of liquid wrench helped. the cylinder is now sitting back in it's home all sealed up.
