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Problem with my MS 661


keptenjim
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4 hours ago, keptenjim said:

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

 

 

How thick is the oil you are running ?

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If you rev a saw flat out without cutting, the oil covers the clutch cover and just drips out when left to stand. When you are cutting, it transfers to the chip and wood so little is left to drip from the saw.

The 661 has a two position oiler. If you are using a shorter bar, turn it down to the lower setting.

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  • 4 months later...
On 26/06/2022 at 21:49, keptenjim said:

Just standard Stihl chain oil

Remember the synthplus stihl chainsaw is rheopecitc......which mean it is VERY fluid when not agitated, but becomes thicker when being thrown around on a running bar and chain so it sticks better.  The advantage of this over traditional always 'stringy' chain oil ,is that it flows better through oil pumps, oiler holes etc, so is more likely to find its way to the bar without clogging.

 

The disadvantage of this type of oil, is that you will get more pooling of the oil at rest or when on idle.

 

 

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2 hours ago, pleasant said:

Remember the synthplus stihl chainsaw is rheopecitc......which mean it is VERY fluid when not agitated, but becomes thicker when being thrown around on a running bar and chain so it sticks better.  The advantage of this over traditional always 'stringy' chain oil ,is that it flows better through oil pumps, oiler holes etc, so is more likely to find its way to the bar without clogging.

 

The disadvantage of this type of oil, is that you will get more pooling of the oil at rest or when on idle.

 

 

Ah thought that was "thickotropic', phonetic spelling only.

Now going to Google your word, and mine, iffen I can spell it.

Edited by difflock
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