Quote:
My boat is just slightly out of your date range (1995 Ski), but has the GT-40 engine. I have kept pretty detailed logs on fuel usage since 2010. The boat runs 90% slalom between 32 to 36 mph, 5% barefoot runs, and very infrequently a joyride. Very rarely is the boat just idling for any period of time.
With that in mind, here are my numbers (approx. 50 hours per year). I'd be curious to see what others are getting.
2010: 3.89 gph
2011: 4.37 gph
2012: 5.16 gph (one faulty spark plug most of the year)
2013: 4.47 gph