No it's oil. Afer taking a closer look at the pitiful shop manual, it looks
like it may be the seal on the oil pump.
any machanics out there have any idea of the extent of this job?? 1999
100HP Yamaha 4 stroke.

"Greg" wrote in message
...
Are you sure it is not just coming from the exhaust port on the top, rear
of
the leg?
If I do a lot of slow speed running I see that on my 60 merc/yammy. It
will
actually run inside the leg covers and show up at the top of the foot
joint. My
mechanic says it is really gas, not oil.