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Re: bar and chain oil leaks when not running
This is normal as the pump creates a pressure vacuum to pull the oil through it to the bar. If you are concerned about this, open and then close the oiler cap. This will relieve the pressure much like in a caulking gun or gen. purpose pump sprayer. Hope this helped.
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The oil inside the tank will expand and contract with heat and cold from where it is stored. It is good to check and see that there is nothing between the bar and the body of the saw which causes the two parts from having a good seal and leaking oil instead of having all the oil go into the bar channel. Take the side cover and bar off the chainsaw and clean where all these parts meet. Sometimes it will not leak as much. If you store a saw in a place that has temperature fluctuations some oil is always going to leak out. I've always stored mine in a plastic container with rags on the bottom.
There is always going to be some oil under the saw, the pump is a constent loss system, oil onto the bar and chain and away, there is a lot of areas in the crankcase and chain brake for oil to get caught and drip out once the machine is set down, if the oil loss is not excesive i would say yjere is nothing wrong here.
As the oil gets hotter it becomes more viscous, so if there is a leak it will get worse, remove the bar and chain, drain the oil from the oil tank and re fill with fuel, this will leak out very quickly and should show you where it is coming from, you can then address the problem.
It is normal for a chain to loosen under usage, especially if the chain is dull or mis-sharpened so that the chain must be overly forced into the cut or there is insufficient oil being fed to the chain from the auto-oiler. Remove the bar and chain--start the engine and look for oil oozing out of the side port in the engine where the bar fits to. If there are thin metal plates on either side of the bar, make sure that the one with a long slot fits to the engine side. This slot allows oil to enter the bar oiling holes no matter where the bar is adjusted. Be sure to clean the two small oil passages in the drive end of the bar that run from the large holes out to the chain groove on either edge. Clean the chain groove as well as the bar and engine side. Reassemble the bar and chain making sure the adjustment 'tang' drops into one of the large bar holes. Install the cover, but leave the mounting nuts/bolts finger tight. Turn the chain adjustment screw CW until the chain just pulls up to the lower bar edge, then tighten the cover mounts. Make sure the chain can be turned by hand and is fully up to the bar with light tension. Chain filing is fairly exacting and must be consistent from tooth to tooth. If a tooth edge cuts your finger, it is considered to be sharp. (not a suggested test by the way) Look for no light reflecting from the filed edge as a good test. Once everything is ready, start the engine and run the bar tip near some cardboard--a few moments running should produce a thin line of oil. If it seems slow to cut, check the chain's sharpness. Don't worry about adjusting the chain to some mark as the chain will grow length with use. It is not necessary to remove the bar and chain when adjustment is required, just loosen the bar mounting fasteners to finger tight. 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!
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
Modern chainsaws have the ability to run without turning the chain via the chain-brake. To set the brake the uppermost handle is pushed forward (toward the chain) and a firm snap should be heard and felt. To release the brake you pull the same handle back (towards the engine) and get the same "snap".
Concerning oil leakage: Bar/chain lube collects on the inside of the clutch cover and the sawdust mixes with it as you saw. A surprising amount of oil gets absorbed in the sawdust and later seeps back out when the saw is at rest. If the level of oil in the tank noticably drops after sitting overnight you may have a leak...otherwise it's normal.
As for a running chain that wont cut, it is common for chains to be installed backward and the unit still function perfectly (it just won't cut wood). See the proper chain orientation here. In this photo the chain travel is from left to right.