Ms 170 leaks bar chain oil out bottom, no oil on chain

It won't have hurt the bar but the drive links on the bottom of some of the chain will be burred up. You can clean them up with a grinder if the damage is minor but a new chain will fix it. Regards Phil.

There should be an adjusting screw around the bar somewhere. Turn it anti clockwise until it stops and then just crack it one turn. If it still leaks too much then turn it down slightly.also try and store the saw on its side to stop the oil just coming out.

Their is a oil passage that has a plastic plug in it by the muffler. It might be gone like mine is.

Most often there is a dust-oil clog in the bottom of the bar slot which closes an oil passage between the bar slot and the hole drilled half way through the side of the bar. This provides a passage between the thin shim plate with the two bar bolt holes beside the bar and through to the oil tank or pump output. You can remove the bar and chain and punch out the blockage in the bar with a paper clip if the chain is removed. Make sure the wire can be pushed from the bar slot right through the side hole in the bar. A gravity feed chainsaw should leak right out into the slot of the shim plate, a button pumper should squirt out there with the bar removed. With a button pumper you may have a tiny check valve in the line or the push button to take apart, replace the spring or unstick the ball inside the check valve. This is why they went to the gravity feed oil system which just leaks in there and gets picked up by the bottom of the links as the chain races past the passage between the bar side hole and the chain slot.

Remove the bar and chain. Clean all parts exposed including the bar drive-end small oil channels that feed oil out to the chain groove on both sides of the bar. Start the engine and look for oil oozing out of a small side port where the bar fits to. If ok and no oil seems to coming from under the case, reassemble all components. Start the engine and run the bar tip at speed near some cardboard--it should throw off a thin line of oil. This saw should have an oil volume adjustment screw in the case back near the lower run of chain or just under the case in the same area. Turn CW to reduce volume. Hope this helps!

Remove the bar and chain, then remove the excess oil and debris. Start the engine and look for oil oozing out of a port near where the bar fits to the case. Any spills while filling the oil tank will allow oil to drip from the case. If the oil comes out properly, clean the drive end of the bar, especially the two small passages from the larger holes out to the chain groove on each side. Clean the chain groove all the way around and inspect the tip sprocket condition. Reassemble the bar and chain, then run the engine for short time with the tip near cardboard to see if it will throw off a thin line of oil onto the cardboard. Hope this helps!

Remove the bar and chain. Clean the oil port on the side of the engine and inspect any seals for damage. Start the engine without the bar--it should ooze out oil when engine is running fairly fast. If ok, clean the oil passages in the drive end of the bar--particularly the small passages that lead from the large holes into the chain groove. Clean the entire groove and make sure the end sprocket (if equipped) turns freely. Reassemble the bar and chain--tighten the tension until the chain does not droop from the bar bottom (chain cuts toward you on the bottom run), and yet moves freely by hand. Hope this helps!

The chainsaw squirts oil into the oil hole in the bar. The chain picks up the oil and carries it all the way around the bar lubing it and the chain. When you quit running the saw there is still a lot of oil on the chain and all away around the chain guide in the bar. Once you quit running it and it sets a while all the oil will follow gravity and run to the bottom of the bar and drip out into the case. It's just another one of life's little nuisances. Have a nice day! Obwhon

remove side cover,bar & chain.above bar mounting studs find a oblong channel that lines up w/ the small holes in the bar.clean everything,sawdust gets packed in the holes.if it leaks oil out the bottom,you need to replace the oil feed line fom the tank.

I have a stihl ms 180 that leaks bar oil all the time