millerlite
Well-Known OPE Member

Now that I have got your attention, poulan sucks. I just ported a non strato crapsman/pull-on my buddy gave me that was mostly junked. I have no use for it so I decided to port it and give it back to him as an intro to modded saws. It runs pretty good for a Crapsman, but it doesnt even have a plated cylinder.
How long do these bare alum cylinders last? Im suprised it made it this far. Seems like a bad idea.
Thing has some gremlins with the idle. Seems to be the week for carb issues this week. Its not a WT89, the carb has just a hole for the H jet. I did bore it out on the lathe, works good on the H but low jet seems like the screw does nothing. I cleaned and rebuilt it, twice. New primer bulb, but as the saw runs primer fills with fuel and tune changes it seems. I checked the check valves in the primer and they hold and seal, its pushing to tank like it should. What would cause this? Leaking needle? Metering lever height looks good.
Heres a video of a few test cuts:
Freeballed this one but the numbers turned out decent when I checked after. Saw has a fancy muffler mod, bored out carb to .515", exhaust widened and raised to 98, transfer sweeps at 121, mains at 124, intake at 77. Set squish to 22 thou. Piston wash looks good. I do clamshells in the lathe. Bore the bearing pockets back out with a jig I welded up that holds the cylinder with the cap on, can dial in the pockets and re cut them in the 4 jaw in a few mins.
How long do these bare alum cylinders last? Im suprised it made it this far. Seems like a bad idea.
Thing has some gremlins with the idle. Seems to be the week for carb issues this week. Its not a WT89, the carb has just a hole for the H jet. I did bore it out on the lathe, works good on the H but low jet seems like the screw does nothing. I cleaned and rebuilt it, twice. New primer bulb, but as the saw runs primer fills with fuel and tune changes it seems. I checked the check valves in the primer and they hold and seal, its pushing to tank like it should. What would cause this? Leaking needle? Metering lever height looks good.
Heres a video of a few test cuts:
Freeballed this one but the numbers turned out decent when I checked after. Saw has a fancy muffler mod, bored out carb to .515", exhaust widened and raised to 98, transfer sweeps at 121, mains at 124, intake at 77. Set squish to 22 thou. Piston wash looks good. I do clamshells in the lathe. Bore the bearing pockets back out with a jig I welded up that holds the cylinder with the cap on, can dial in the pockets and re cut them in the 4 jaw in a few mins.