markharro

Thanks that's helpful. I actually sharpened the chain recently so that's all good.

No the bar oil hole was ok. I found the screw to increase the oil flow and that seems to have sorted it. Final query at the moment - whats the best thing for scrubbing the gunk of the chain before storing - I am thinking some sort of wire brush but would this not also dull the chain?

On a slightly different point, does bio-oil get more viscous over time even if stored in a closed bottle? The stuff I have must be around 3/4 years old now in a 5l container and I doubt I have used even 500ml yet. There is barely any evidence of oil on the chain and the tank is full etc. Will increasing the oil pump flow make a difference?

Can I ask what OSR is? What is the best way to clean the chain and rest of the machine of the gunk - WD40?

Its been interesting reading these posts as an occasional chainsaw user. I recently moved to bio-oil from mineral and am finding it seems to stick and gunk up the chain. I can easily have the saw sitting for 6 months or more without being used and am concerned that this oil might oxidise and corrode both the bar and chain. My 550XP manual also seems to say to empty the oil if you are storing the saw longer term and take the chain and bar off and clean them before storing. It all seems a bit of a PITA compared to the mineral oil I used before. A few questions then. Are there any bio-oils that don't create oxidation problems? How long is it safe to keep bio-oil in the saw before draining it if not using the saw? The mention of rapeseed oil - is this simply the stuff you would buy in the supermarket for cooking?