figure 7-10gah if run under 3500rpm cruise. Going to a smaller engine may
not save much fuel because while the V8 can cruise at say 45mph a smaller
engine boat may be wide open throttle at the same speed.


"Captain Chaos" wrote in message
...
I'm looking to buy a late 80's 19' runabout with a Chevy 350 motor.
Intend to tow an inflatable, cruise the lake, and occasional fishing.

How much fuel can I expect to consume cruising at 20-25 mph? How less
fuel efficient would this boat be compared to one with a smaller
motor?