Interesting. Do you know offhand if a QSB would fit under a flush wheelhouse deck with a step up from the cockpit? I know it’s been done with Yanmars.
I have the same boat with aYanmar 440 in a 2008 boat but am getting lower speeds. I don’t have a genny or fish boxes so weight is probably pretty close. What prop are you using?Power is a 440 hp Cummins QSB 5.9 cruises at 19.4 knots 13.3 gph 68 % load wI’ll top out 24 knots holds 220 gallons of fuel and has 2 huge under deck fish boxes that can hold 9-10 (60-70 lb ) yellowfin on one side and 6-7 (60-70lb) yellowfin in the other side. Full back with slider, heat, air conditioning 5k northern light generator.
I am just he guy with the little boat but run, chart, and mark everything I can in that inlet yearly. So last November stripper fishing on my buddies 35 pursuit twin diesel the boys were looking to party on this trip so I volunteered to Man the Helm and keep my rum in the bottle, not often I get to run a 35 footer through some snotty crap and still run at 28knots. So going out of Fire Island Inlet had the incoming tide close to the top so wide swing to the south and line up the buoy's tight west and out we go.I ran 1700 miles this season in the GSB. except for picking up a folding chair early on the season , did’t have any problems.