keptenjim

Just standard Stihl chain oil

Apologies everybody - I got severely side-tracked. Well I did what I said I was going to do and that is buy a new pump and fit it. I started the machine and got the same result - no change! So an arborist friend suggested I take it to somebody in our area who "knows his chainsaws." He ran the saw and also cut some wood with it and checked the oil situation after that and concluded that the amount of oil coming from the saw was no more than he would expect. He said the chainsaw is running normally. So there you have it. Before the chain derailed, there is no way it chucked oil over my boots and clothes as it does now. Maybe its got something to do with the fact that lately I have been running it for the purpose of checking it without cutting wood. I'll see how it does next time I use it. Many thanks for the input I got

This afternoon I will change the pump outlet seal with a new one, as Spudulike suggested, then I'll run the saw. If it still leaks, then obviously the pump is damaged and I'll replace it. Thanks to all for your help and advice.

Yes, the bar was changed for a brand new one, the same as the original one. The original one got damaged when the chain derailed

The rubber seal looks ok to me, or should I take it out of it's housing and inspect it? The crank seal hasn't been changed lately

Finally managed to get this done. I tried what you suggested and blanked out the oil channel using a piece of cardboard and then mounted the bar and made it nice and tight. I ran it in the manner you suggested and sure enough, oil was pissing out. So, I stripped it down and found that although the cardboard was still in place, there was evidence of oil having flowed down from the oil channel. Perhaps after the run, there was a residual pressure in the oil channel which equalised when I removed the bar and caused a bit of oil to squirt out around the cardboard? However, as you can see, there was also quite a lot of oil in the pump compartment. I’m thinking, maybe its time to fit a new oil pump and be done with it?

Thanks, I'll try this and let you know - John

Yes I took the side plate off to enable you to check for damage in the casing underneath. Also, I only run the chainsaw with the chain tensioned and the bar firmly tightened up to the bar mount

I did what you suggested re the WD40 trick although I don't know how successfully I covered the gaps! But I didn't see any leaking fluid. I cleaned it out and gave it a close inspection with my untrained eye but didn't see any damage. I then reassembled it and ran it and ended up with oil pouring out as before. So I quickly disassembled it again and tried to see where the oil was coming from and I get the impression that it's running down mainly from the oil delivery channel. I am now wondering if the metering system whereby the rate of oil delivery to the chain can be adjusted, is perhaps damaged, and the pump is now delivering too much oil up to the chain?

Cheers Spudulike - many thanks for this info. I'll work on it tomorrow and let you know what I come up with. Thanks again

I agree with you - I don't know what happened there. The second time I tensioned the chain, I paid close attention to what I was doing. In retrospect I should have looked under the chain cover after the first mis-start. But that's another story - right now I'm trying to get to get to the bottom of the oil pools

Don't think so Stubby - looks damage-free as far as I can see

I recently needed to use my MS661, so I filled it with Aspen 2 and chain oil and tensioned the chain. I started it and almost immediately noticed that the chain was loose. I re-tensioned the chain and then restarted the chain saw. Again it loosened and then came right off the bar. I switched it off immediately and removed the chain cover and saw that the ‘E’ clip that retains the chain sprocket was missing. I also noticed that the bar was damaged when the chain came off. I replaced the bar and the chain with new ones, fitted a new ‘E’ clip and started it again. It’s now running well but after use where it’s been sitting on the ground, leaves pools of chain oil below it. It seems to be leaking this oil only during and after running and not when sitting unused. Can anyone advise what might be the problem?

Well that does it then - the trees stay as they are and the hedge gets planted between them. Thanks to all for feedback

Thanks for the advice given. But quite honestly, I'll probably be pushing up daisies by the time I've coppiced everything and then waited for the regrowth then laid a new hedge. No, no, I simply want to cut all that growth down to about 8 feet or thereabouts (see pics) and plant new hedge in the gaps. What I'm asking is 'if I do this will those trees shown in the photo survive such radical cutback and will they grow to help form the structure of a hedge'? If someone could help me with those questions I could then decide if it will be a worthwhile project