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If the oil is running out via the delivery line to the bar then there is a chance that the tank vent is plugged up. If so, the chain may be running ‘dry’ during operation. Also, what happens if you run a chainsaw without bar oil? Without lubricant, the speed at which the chain moves over the chainsaw bar can cause some serious friction.
This oil then builds up inside the body of the chainsaw, and drips out through unsealed parts of the casing while in storage. This kind of issue is most likely if oil leaks while the chainsaw is in storage, but there is an insufficient amount of oil distributed to the chain while the tool is in use.
The guide bar requires a constant supply of oil during operation. Running the saw without sufficient oil will overheat and weaken the bar. Replenish the bar and chain oil every time you refuel, and check frequently to see that the chain is spraying a fine mist of oil at the nose by holding the saw just above some leaves or snow.
If no oil is visible after running the engine for a few seconds repeat the pressurizing procedure (I had to repeat it once). Once oil is flowing reinstall the bar and chain and run another oil test – this time hold the end of the bar near a sheet of cardboard to see if you get any oil splatter on the cardboard (with the engine running).
Certain chainsaw bars and chains need lubricants with certain properties to help the parts run as smoothly as possible.. Chains spin at high speeds, so it’s essential that the bar oil be adhesive enough to remain on the chain as it continues to spin. If it’s not sticky enough, it can come off the chain and lead to friction against the bar.
· After you finish using your saw for the day, take the bar and chain off and clean out all the debris that has accumulated around the oiling mechanism. You can check to see if you have cleaned the oiling mechanism thoroughly by running your saw without the bar and chain on …
Bar Groove and Oil Hole Cleaning. Any time you inspect a guide bar, take a minute to clean the wood chips from the center of the rails and make sure the oil hole is open. This can be done with a groove cleaner or even a pocket knife. Having clean bar rails will allow oil to easily move down the bar. This is good for both rail and tip lubrication.
· Similar to motor oil, chainsaw bar oil is available in various weights. The lightest oil is a 10W formula, while thicker oil may be up to 50W. A 30W chainsaw bar oil is generally considered standard for warm weather usage. However, you’ll notice that most chainsaw bar oil manufacturers don’t categorize oil according to weight.
· You don’t want your engine to be tilted for two long, as it can cause oil to flow back out of the crankcase. This can cause lubrication issues at times. Refill the Tank with Clean Fuel – Don’t fill the tank, just add enough fuel to get the mower up and running for a bit.
· Running a 2-stroke without lubrication is not good. If your engine will still turn over, it isn’t seized, and you may have dodged a bullet. Put the correct oil/fuel mix in and see what happens. Because it’s a large engine (as opposed to the 26cc motors in trimmers etc), you have a (slightly) better chance of getting away with this unscathed.