A few of things here, the pick up pipe can get kinked thus slowing the oil flow down, the filter on the end of the pick up pipe may be partly blocked,if you are using non fling oil and the outside temperature is very cold you may need to thin the oil to allow a better flow, finally you can modify the pump shaft, this is done by increasing the angle on the end of the pump piston ( the bigger the angle the bigger the throw of the shaft and the more oil is pumped ) this is a final resort and has to be done with care, you have to remove the shaft from the pump body and hold against a grind stone to increase the angle
SOURCE: chainsaw leaks chain oil when not in use
The oiler on most chainsaws is designed to be gravity fed. For that reason, if there is oil in the oiler it will drip out. There is no fix to this except for awareness. When possible stop work when you need to refill the oiler. when not possible, expect it to leak and plan for it. for example, store the saw in a tray with some oil-dri absorbant clay in the bottom.
SOURCE: 455 rancher will not produce oil for the chain.
Also make sure that where the oil is pumped against the side of the bar that the oil port (little hole) that feeds oil into the bar's slot is clear. Mine would go through a tank of oil with each tank of gas, but the chain wasn't getting oiled until I cleaned out this little hole.
SOURCE: Fuel Mixture Husqvarna 455 Rancher Chain Saw
Page 17 of your Operator's Manual says 50:1.
Fuel/Oil Mixture
Lou
SOURCE: Oil is leaking out the bottom of the saw after
check the hose that goes to the oilway if everything checks clear you may have a crack in your oil tank due to excessive vibration and weak molding.
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