On Nov 23, 4:28*am, "Roger Long" wrote:
wrote

I'm sure I'm missing an important bit of your argument ...

You did and it's my fault for sloppy writing. *I wasn't trying to say he
isn't welcome or shouldn't be asking questions here but that he would get
better and more considered answers here if he provides enough information to
assure people that they are real issues and enough data to provide
reasonable answers.

No, no, it's my fault Anyway, I'm with you that the question asked
wasn't answerable without more work. Sometimes that can be the result
of difficulties defining the problem and sometimes it is because the
poster is dishonest. In the first case there can be a useful
dialogue. I guess my difference with you here is that I'm not at all
concerned about the "reality" of the issues. I think good discussions
can be had on entirely hypothetical issues and even purely fantastical
ones. By the time it gets to my LCD it's all cyber stuff anyway...

-- Tom.

PS. Did I mention that I think the problem with hunting on my 2gm20
was with a faulty valve on the return line? On some versions of the
2gm and other Yanmars they "T"ed the return line and sent some of the
fuel back to the primary via a one way valve (a BB and seat). If that
valve leaks it makes enough vacuum to pull some fuel out of the filter
and you get air in the system... I removed the valve and took out the
"T" and that seems to have solved things. I'm sure that Yanmar went
to the trouble of doing things that way for a reason but so far I
can't see any difference in performance...

T.