I just had my PPB4218 die because the fuel mixture was too lean from the factory. It scored the cylinder walls and has almost no compression. Is no longer strong enough to cut at a decent rate when it does manage to run and will not idle.
I bought it because of hurricane Rita, and it's died on me while cleaning up from Ike.
In disassembling it I noticed those adjustment screws take a special tool (not provided by Poulan of course) that I've been trying to figure out since day one how to adjust.
But if you can find either a soft-metal (like copper) or strong enough plastic tube that will press-fit onto the adjustment screws. Maybe you can save yourself the inconvenience. They have barbs on the sides of them that will hold onto whatever fits tight enough.
Finding the right inside & outside diameter tube is the key.
But depending on how old yours is, you might have to fight another battle. The screws are not bare metal. They are coated with something to keep them from rattling loose. I had to use hemostats on mine to get enough leverage to break this grip. I'm not sure any tube would be strong enough to do this over the barbs.
Good luck!
Personally, I won't be buying another Poulan.
C. Fisher, October 2008
