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Do Chainsaws Drip Oil?

Published in Chainsaw Maintenance 3 mins read

Yes, chainsaws can and often do drip oil, particularly when they are not in use. This dripping is typically bar and chain oil, which is essential for lubricating the saw's chain and guide bar during operation.

Understanding Why Chainsaws Drip Oil

The lubrication system in a chainsaw is designed to continuously apply oil to the chain as it spins around the guide bar. This process generates heat and friction, and adequate lubrication is crucial for preventing wear and ensuring smooth cutting.

According to the provided information: "When the saw is stopped the oil will very slowly begin to form larger droplets that will over a period of many hours run towards the lowest part of the saw – typically below the sprocket and then drip onto the surface below."

This means that after the engine is shut off, residual oil remaining in the lubrication channels, on the chain, and within the bar groove will gradually collect. Gravity pulls this oil downwards, and it will eventually drip from the lowest point of the saw, commonly near the sprocket where the chain wraps around.

Is Some Dripping Normal?

A certain amount of dripping after use is considered normal for many chainsaws. This is because the lubrication system is designed to flow oil liberally during operation, and it's difficult for all the residual oil to stay contained once the flow stops. Think of it like turning off a faucet – there's always a bit of water that drips out afterwards.

  • Expected Dripping: A few drips or a small puddle forming beneath the saw over several hours or even a day or two after use is often just residual oil draining out.
  • Excessive Dripping: If a chainsaw is leaking a significant amount of oil constantly, or if it's leaking while stored for extended periods after the initial residual drip, it might indicate a problem, such as a seal issue, a damaged oil line, or a clogged vent in the oil tank causing pressure buildup.

Managing Chainsaw Oil Dripping

While some dripping is normal, it can create messes on floors or storage surfaces. Here are a few practical tips:

  • Store on Absorbent Material: Place the chainsaw on a rag, cardboard, or an oil-absorbent pad when stored.
  • Drain Oil for Long Storage: If storing the chainsaw for an extended period (like off-season), consider draining the bar and chain oil tank to prevent prolonged dripping and potential mess.
  • Check for Leaks: Periodically inspect the chainsaw for obvious signs of leaks like cracked hoses or damaged fittings, especially if the dripping seems excessive.
  • Store Safely: Always store the chainsaw in a safe location away from ignition sources and surfaces that could be damaged by oil.

Understanding that residual oil can drip after use, as described in the reference, helps manage expectations and storage practices for your chainsaw.