Re: MERC 150 HP CARB FUEL USE CHART
Kurt, I don't have a chart, but an old rule of thumb is one half pound of fuel per horsepower per hour. Using this, WOT would approximate 1/2 x 150 or 75pph, and if fuel weighs around 6.5 pounds/gallon then 11.5 gph would be close. This formula seems to apply to reciprocating (2- and 4-stroke)as well as turbine engines, and has so far proven accurate (plus/minus 10%) at anything above 1/2 throttle. Below that, no guarantees...hope this helps. <br />In my limited experience, marine two-strokes seem to have a fairly linear torque curve within their power band (unlike their two-wheeled brethren), so half throttle should approximate one-half power output...although I'd like the input of someone with more years of outboard experience on this one. I suspect the difference to be mainly due to exhaust configuration...which would also explain the 5500 rpm ceiling outboards seem to share regardless of size. Comments?<br />Rich
