Re: poulan pro series chain saw 20" bearings seizing up...
There's a tiny hole on the front of the bar near the bar sprocket. This is used to grease the sprocket. If you go somewhere like Lowe's look in the chainsaw section and you'll find a grease tube that is specially designed to lube the front sprocket. Before lubing use a small wire to clean out any debris from the whole. Press the lube tube against the hole and push repeatedly until grease comes out from the outside of the bar. This should greatly extend the life of the bar.
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CHAIN STRETCHS AS IT HEATS - KEEP CHAIN TIGHTENED CORRECTLY AND ALWAYS KEEP OIL IN OILER AND MAKE SURE IT OILS THE CHAIN. IF THIS DOESN'T FIX - REPLACE THE CHAIN. IF IT STILL HAPPENS THEN REPLACE BAR. WILL FAIL AGAIN WITHOUT OIL. POULAN WILL NOT HOLD UP WITHOUT CHAIN LUBRICATION. WORSE THAN OTHERS. IF CHAIN OR BAR OVERHEATED YOU'LL WORK ON IT MORE THAN YOU CUT. OIL IS THE KEY TO CUT WITH A POULAN!
personally too much hassle prefer Stihl Chainsaw more reliable Seizing is caused by lack of lubrication, First check all level has oil pump seized or is it sump type when running oil circulates all way round, Still there has to be a oil reservoir if this is bone dry theres your problem the rattling is metal on metal with no protection and the damage is seizing caused by lack of oil I have two chainsaws both have oil sumps and are kept full, please check hope this helps
hi after awhile chains stretch, make sure they get oiled good. nut that holds bar must be lose, like a 1/2 turn then you can tighten screw . don't over tighten ether of these. it takes time to find your saws happy spot , so be patient and keep trying to tweak it tell ya find it..vote if'n i was of help.. remember BUY USA MADE PRODUCTS.. Jay
There should be only two small diameter hoses (lines) that connect to the carburetor--one comes from the fuel filter in the tank and the other connects to the primer bulb. If either of these is melting/breaking from heat, someone has replaced them with inferior rubber/plastic tubing or you have some serious engine heat problems! Buy the correct lines from a Poulan saw dealer and replace the junk. If you had that much heat, it would have seized the piston in the engine. After the lines have been replaced, check the fuel filter, air filter, and muffler for plugging. Start the engine and after warm up, open the throttle fully. It should 4-stroke but immediately 2-stroke when cutting. If it 2-strokes at all times, then the 'H' jet needle may need to be adjusted. Don't ignore this as it causes overheating, low power, and possible engine damage. Hope this helps!
The chain could be stretching. Are you using a good quality bar and chain lube? Never use old motor oil. Once the chain has jumped several times it may be bent.
Properly adjust the chain and keep an eye on it while using. start with a new bar and chain and watch the tension. You can also replace the tool less cover with a standard cover for about $25
Following is a link to a Poulan Parts Dealer that has the adjusting wheel. I also included a pdf of break down parts list for your model. Please rate the answer on its value of help. Good Luck have a great weekend.