May upgrade boat and would need a motor. Nothing expensive and I like the ease of maintenance on the old 2 strokes. Anybody have any fuel burn numbers of a 150-175 on a 20-21 foot center console. How many gallons per hour at 4000-5000 rpm. I know every boat will produce different number but do these motors burn gobs of fuel or are they about average for carbed two strokes? Any other choices in the older models?