At one time Electrolux owned both Husky and Poulan. Some of the Poulan Pro models were based on Husky parts internally and yellow plastic moldings instead of orange. Homeowner saws were always Poulans designs.
Some of the homeowner Husky's were sharing parts with some Poulan models. I have a 50cc stratocharged Poulan that is based on a Husky design...
There are "big bore" kits for most Poulans. They are often more cost effective than buying an OEM cylinder and piston. I have a 42cc kit in a 36cc Poulan
These saws are oil sensitive. Try to run them on 50:1 and they will slowly loose ring tension and compression. Run them on 42:1, or richer, and they run a long time. In the woods blue smoke is good, always was, still is
When you tune the carb high speed jet ( H ), make sure to go for max RPM and then 1/8 richer. DO NOT try to run one in the wood with the carb leaned out for max RPM w/o load, you'll loose a piston/rings quick.
Ideally, any chainsaw should be just on the verge of 4-stroking as you approach the log/tree. It should clean up and be running strong as the load comes in ...
All these modern saws are somewhat resticted in the exhaust. you will often find a screen and small hole at the muffler outlet. It's easy enough to drill out the discharge hole and put the screen back in.
Also, if you look into the muffler, you will usually see a port pipe with a 1/2 dozen holes to feed the muffler out of the engine. I usually drill another 1/2 dozen. It'll take a sharp pointed drill to bite into the sheet metal at an angle, but it will work
With the exhaust mods, you'll have to tune the crab from scratch...