On Sun, 14 Sep 2008 18:46:52 -0700, Rick Cortese
wrote:

Slow in the group so I figured I'd waste some bandwidth. Checked the
mileage and my boat with an 18hp two stroke only makes 2-3 mpg.

A more realistic measure would gallons per hour. Miles covered per
gallon is subject to too many variables - tides/current, wave height
and frequency, wind speed and direction, etc.

My boat, a 42' Moody, a substantially-built sailboat, uses around 1/4
- 1/3 of a gallon per hour. Distance covered in that time - anywhere
from 2 to 10 nautical miles.