OT - advice forum for outboards

I was wondering if anyone knows of some good forums for outboards engines.
I have a Merc
with some serious longterm carburetor issues. I've posted on Iboats and
Nextbite, but
they appear to be Merc sponsored. I think there's a political correctness
thing there
where if the question is about an actual merc problem, the silence is
deafening.
It seems like when the issue is user error, or boat rigging, etc, the
replies are active.
Any suggestions would be appreciated.
thanks
bill