They tend to come tuned lean from the factory... and recent models have eliminated the mixture adjustments on the carbs. As a result, a lot of people have been unhappy with them. Hard to start and seizures.
Fueled with an engineered pre-mix 2-stroke fuel like TruFuel, or e-free gasoline and a quality 2-stroke oil like Stihl Platinum, they usually run fine. Then we get into some real user issues. Many people assemble the bar and tighten the chain until it's snug. Actually chainsaw chains need a bit of looseness to the chain in order to cut and clear chips properly. A rule of the thumb is you should be able to pull the chain away from the middle of the bar and have a little light between the drive tooth and the bar track.
More user issues, chains stretch a lot the first few hours of operation, so some people wail away until the chain comes off and think it's cheap or worn out. Expect to tighten the chain (not too much) every 10 minutes or so of cutting until its broken in.
Another issue is the factory chain comes only semi-sharp. If the user managed to get past starting lean on Ethanol gas and chain tightness and adjustment issues, by the time they get through the first couple of hours of cutting the chain is already overdue for its first sharpening.
I pick up Poulans cheap at yard sales and fix them up, parts are cheap and aftermarket parts even cheaper (fuel filters, fuel lines, priming bulbs). If they're not lean seized (or sometimes even if they are,) I can usually get them running and they do good service for me. Typically if they sit for a few years the priming bulb has a vacuum leak.
I sharpen with hand files and a simple angle guide, on a new chain the cutting performance improvement is amazing.
Agree with above 100%. Poulans are not the easiest no-brainer saws to use. But if you know their quirks, you can get them to work well and they are easy and relatively cheap to work on, as parts are out there. For work delivered/$$ cost, can't really be beat. But they are a bit quirkly. Less troubles but more cost would be Echoes, Stihl, Husqvarna, or Dolmars.
Problems I've seen:
1. Screws can loosen, if around combustion chamber, results in an air leak and loss of compression. Easily fixed with loctite, but probably responsible for a good 20% of the "Poulans work once then never again" complaints.
2. Gas cap or primer bulbs can leak, resulting in carb problems. Must have good parts there.
3. Carbs can get dirty or fuel lines can crack. Lines that come with them aren't very good. Replace them every few years. If you don't know how to clean the carb proper, buy a new one for less than $25.
4. Ignition can come loose or need adjustment over time. Make sure gap is set right every 20 hours of use.
5. Exhaust is restricted. Port the muffler easily and get 10-20% more power.
6. Older models with the carb adjustment screws are much preferred. If you do port the muffler, you need to adjust the carb a little richer fuel/air ratio (turn screws counterclockwise to richen fuel, clockwise to reduce fuel/increase air). Just very slight changes, like 30-60 degrees.
7. Replace anti-kickback chain with real chain (but know how to use a saw if you do that.)
8. Change out spark plug with cooler running plug as Poulans get hot riunning.
9. Be sure to use the right oil/gas mix ratio. They are pretty sensitive to this actually. Any carb "tuning" is for one gas/fuel mix, not a broad spectrum of ratio or they won't run good or start good.
10. There are some in the chainsaw milling community that have played with the 42 cc Poulans and souped them up and love them! Not just junk! But need some love to work good.
11. In general, always use safety chaps on legs and a face shield/helmet when using any chainsaw. Accidents happen. If they do, you want the chaps or face shield to protect your body from a moving chain or kickback event. It is worth it. - Paul