Excessive oil leaking while running from bar oil port

It will never be completly leak free, if it is bad it could be a number of things, first check the oil pick up hose behind the pump, if this is a poor fit in the crankcase it will leak oil from around the sides, worst case is a leak from the crankcase gasket itself, this would require a full strip down, try draining the oil tank and re filling with cleaning fluid, as this is much thinner you will see very quickly from where it is comeing.

Make sure that you can move the chain by hand and that it is being properly oiled. Remove the bar and chain after releasing the chain brake. Clean the side of the engine where the bar fits to, then start the engine--oil should ooze out of the port. Wash out the interior of the clutch with spray carburetor cleaner to clean away excess oil accumulation. Clean the drive end of the bar small oil passages that run from the large holes out to the chain groove on each edge. If oil oozed out during the run test, reassemble everything making sure the chain teeth cut toward you on the bottom run. Adjust the chain up to the bar, but not so tight that you can't move the chain by hand. Tighten the cover fasteners and recheck the chain tension. Start the engine and run the bar tip near some cardboard--it should throw off a thin line of oil after several moments. Hope this helps!

Remove the bar and chain after releasing the chain brake. Clean the engine case where the bar fits next to and start the engine--oil should ooze out of the port in the case. If it squirts out, there should be an adjustment screw head that is located in the rear of the case near the returning chain area. Turn the screw CW to reduce oil delivery. Clean the small oil passages in the drive end of the bar that run from the large holes out to the chain groove on each edge. When everything is re-assembled, start the engine and run it at speed with the bar tip near some cardboard for a moment or two. It should throw off a thin line of oil. Adjust the volume screw until you achieve that result. Hope this helps!

Remove the bar and chain. Clean the engine side case where the bar fits. Does the oil port itself leak or is it coming from the engine case? If from the case, it may be a loose or split line from the tank or it could be a cracked oil tank. If the tank is cracked, replace it as there is no glue or epoxy that can permanently repair it. If the leakage seems to have stopped, clean the drive end of the bar including the two small oil passages that run out to the chain groove. Re-assemble the bar and chain, then run the bar tip at speed near some cardboard for a few moments--it should throw off a thin line of oil. This saw should have an oil volume adjustment screw located near the chain return area on the back or underneath the case. Adjust CW to reduce the oil volume. Hope some of this helps!

Release the chain brake, back off the chain adjustment screw several turns, then remove the side cover and the bar/chain. Clean the engine side case where the bar fits to and run the engine for a few moments--oil should ooze out of the side port in the engine. If ok, then clean the removed parts including the two small channels in the drive end of the bar that convey oil out to the chain groove on each side. Reassemble everything and then run the tip of the bar near some cardboard for several moments at speed--it should throw off a thin line of oil onto the board. Unless you have a leaking oil line or the tank is split, you should have minimal leaking problems. Hope this helps!

Lay the chain out on a table or bench and check for bent/broken links, broken teeth, or damaged drive teeth. Inspect the bar for any damage and clean the small oil passages in the drive end. Inspect the drive sprocket for any tooth damage. Run the motor without the bar and chain for a few moments. Oil should ooze out of the small port in the motor case where the bar fits. If nothing, inspect the oil pump and lines. If oils ok, then reassemble the chain and bar making sure the bottom run of teeth cut toward you. Assemble the cover and mounting nuts finger tight. Tighten the chain up to the lower bar, but not so tight that it can't be turned by hand. Tighten the mounting nuts and recheck tension. Make sure the chain is properly sharpened as a dull chain will quickly loosen due to excess heat when cutting. Check the chain oiling by running the bar tip near some cardboard for a few moments--it should throw off a thin line of oil. Hope this helps!

First, deactivate the chain brake, back-off the chain adjuster, then remove the bar and chain. Run the engine at speed for a moment or two--the oil should ooze out of the engine side port. If the oil quantity seems about right, then clean the drive end of the bar oil-passages including the two small passages that go out to the chain groove on each side. Clean the chain groove and check the sprocket on the far end (if equipped). Reassemble the bar and chain, then start and run the engine at speed for several moments with the bar tip near a piece of cardboard--it should throw off a thin line of oil onto the cardboard. Check the owner's manual for location of any oil-volume adjustment if needed.

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!

If the pump is a piston type, there must be valves on both sides of the pump to control the flow of oil in one direction. The one in the tank is called is called a 'duck-bill' valve and may be mal-functioning. Can you move the diaphragm by hand to see if it pumps anything? Did you run the engine without the bar and chain attached to make sure the bar oil-ports were not choked up. Oil should ooze out of the engine side port when running. Hope some of this helps!

Take the bar and chain off--run the engine--the oiler port from the case should discharge some oil. If none, you have trouble with the oil pump or the tubes to and from it. The oil tank may be leaking at the tank opening for the pickup tube. If oil appears at the oiler port, then there may be dirt/blockage within the oil passages in the bar end. Clean with compressed air.