Hi
I like to help you because I see no others volunteer.
I have converted a Homelite 38cc chainsaw engine and a Weedeater 25 cc and both take a lot of abuse in a test stand and we , in the club fly a Homelite 25cc with success and a Weedeater 18 cc very tired and with electronic ignition.
I have a bit of background and a knowledge of 2 stroke engines playing with mopeds.
The construction of the chassis of Poulan and Homelite is almost the same, plastic chassis and the engine is attached at bottom with four screws.
You must carefully clean the chainsaw to avoid dirt inside the engine in the next steps.
First , put the chainsaw on the bench and disasemble all around and the last thing you make is unscrew the four screws of bottom carefully because all aluminiumblock fall and you can damage it because the block split in two and can expose the cranksahft and piston to shocks.
This is in general, I dont know how is the coil atached to the engine , if the coil is screwed to the engine ,GOOD!
I believe the carb is atached to the engine thru a plastic adapter, no rubber hose, if plastic adapter , GOOD!
If it have compression you can afford the conversion.
The standard ignition is good, but need a starter or a Black & Decker drill bit machine with reverse , may be a battery powered drill, good price when compare with airplane starters.
You can see a very similar engine conversion process int this site in the post "Homelite 33" .The only difference may be ignition coil attachment and the carb adapter.Good photos and also see the redirected sites for photos.
The adapters to atach to standard motor mount is the same.
Good luck and be patient.
Oh, I forget, I suppose the chainsaw you have is the model with plastic outer chassis, this model I know.
Sorry my english.
The standard ignition with proper air gap is generally hard to start , aprox speed to deliver spark is more than 500 rpm, say who knows but when it start it is reliableif the system have proper care.
You can get in touch with Carr precision, and Waker engines for conversion parts.
Have a nice conversion
I have very hard start when take my first engine to convert , be patient, you have better luck because I have no RCUniverse and it provide a lot of info and photos.
See converted engines in your club, it helps.
Jose
Argentina