Quote Originally Posted by Agent_24 View Post
With the new spark plug it was very easy to start. Once going, it seemed fine and cut the grass well as I would expect.

The only problem was dying twice at idle for no apparent reason.

Yes it has one but as mentioned earlier, that had been replaced with a brand new one by the previous owner so it's probably fine? It doesn't look dirty, anyway.

I guess I may have to run it for a while with the new plug and see what colour results. I used a 25:1 mixture as the manual stated, but who knows what mixture the previous owner was using. My granddad always put extra oil in his chainsaw mixture claiming more oil was better for it (but that seems debatable to me).
Actually putting more oil in the mixture makes the fuel denser and less of it flows through the jets creating a lean mixture.