Chain saw will not pump oil to chain and bar.

Sometimes saw dust and shavings block the oil port and track strip down the bar and chain there maybe a cover over the oil port remove this and clean carefully replace all remember to clean the bar put the chain on do not over tighten run the saw if there is no oil you may have damage to the oil pump this can happen if the saw was used with no oil or a blocked oil way some of the pumps will overheat causing damage hope this helps good luck

I get asked this question a lot , im gonna have to make a video on this subject someday .
but here:
1st ck your oil viscosity/SAE it should be 30 and say bar/chain oil
next dump out entire oil tank and wash out with kerosene (you'd be surprised what I seen come out)
then remove bar and chain , locate oil outlet it's in body of saw near adjustment screw , use a small can of air to blow in this port softly , use a touch more of kero to clean this all out , refill tank with proper oil !!!! and run saw (no need to put bar/chain back on yet ) might take several minutes but oil should start to flow out hole !! stop saw and reinstall bar/chain then run again .. fixed !! if no oil comes out ever your oil pump is gonna need some fixing

for a low cost oil I use filtered used motor oil cut down with a dab of kerosene

all oil tanks on chain saws take Bar/chain oil this can be bought same place u buy 2 cycle engine oil most times , this bar chain oil most times is a 30W oil , if you change weights of oil then oil pump is not gonna add proper amount of oil to saw in use ,this will cause u problems !

Remove the nuts that hold the clutch cover on, Then remove the bar and chain. Make sure the port hole in the bar is open for the oil to flow into the chain groove. The oil ports can get plugged by sawdust and chips. Bar oil is sticky. The bar and chain should be removed and cleaned on a regular basis. Clean the groove in the bar too. Also make sure the port on the saw body is open. Start the saw with the bar and chain removed, if oil doesn't flow from the port, then you have a faulty oil pump and will need to go in deeper to replace the pump parts.
Always use proper clean chainsaw bar oil. Using other types of oil can burn up your oil pump.

Check that the bar oil ports are clean; there should be a small hole or slot on each side of the bar and these can become pluged with sawdust. Also clean the groove in the bar with a small screwdriver or bar cleaning tool every 8 hrs of operation.

If this does not fix the problem check the oil sump screen in the oil tank(usually on the end of a rubber hose); if no screen in tank: remove oil pump and clean(screen is sometimes in oil pump assembly).

If you take the bar off, and then run the saw, does oil come out of the saw? If it does, then the oil pump is likely working O.K.

If the oil comes out of the saw and does not make it onto the chain, it is possible that the oil exit slot on the saw, and the hole on the bar are not lining up properly. This happened on my Husqvarna 141 saw. The oil was coming out of the saw fine, but it never made it to the bar and chain. As a consequence the chain was always dry and very, very hot.

The other saws we use, always have plenty of oil on the chain. I think Husqvarna may have made a design flaw on some of their saws, and the exit point of the saw and the entry to the bar are not properly aligned. I wonder how many saws this affects.

Remove the bar and chain again, and check the two small oil passages that run out to the chain groove on either edge of the bar for plugging--they commonly fill with sawdust and dirt. Clean the entire chain groove, then reinstall the bar and chain. Make sure the bar fits up to the engine case tightly and that the chain adjustment 'tang' drops into one of the large holes in the bar end. There is usually a rubber seal on the engine case side where the oil oozes out--make sure it is intact and in place. Hope this helps!

Remove the chain bar and look just below the bolts holding it in place. You'll see a small hole where the chain bar oil pump pushes out oil. Make sure this hole is clear then run the saw without the bar on.
Be CAREFUL of fingers!
You should see oil coming out of that hole. If not, you may need more serious work done with the saw (chain bar pump replacement).

Depending on your knowledge and experience -
1. Find your manual and check on maintenance routines.
2. If no manual avail - clean your saw and your bar.
Bar - oil holes clear, groove clean etc
Saw - locate where the oil pumps out - ensure any guides, holes etc are clean.
3. If saw gas manual oil pump adjustment screw -advance the flow
4 Drain the oil tank checking for dirt etc and if necessary clean tank with a little of your fuel.
5.Refill oil tank AFTER it is clean and dry.
6. Replace bar/chain etc and test if flow is better
If still no good you may need to repair/replace oil pump -not that hard to do but if in doubt take it to a reputable dealer.

Just a thought: Is it cold where you are? At this saw mill where it is my job to keep chain saws running, learned years ago that you cannot use "bar oil" in winter. Need thinner oil, like motor oil. ....preferably a "non-detergent" motor oil, plain 30-weight is OK, HD30W will work, but the HD part causes the chain to stretch more so than standard bar oil. The bar oil literally is so thick in cold that it stripped the worm gear out of a Poulan Pro oil pump (plastic gear, anyways, wasn't much to begin with.) But thought you may want to try thinner oil, if it is cold where you are. Oh yea we also have 2-Husqvarna 359's with 20-inch bar, and use thinner oil in winter. Our Husqvarnas have an oil adjuster located on bottom, on clutch side. Straight slot screw adjustment.