Most engine decisions on a 42-foot center console are a straight trade: more power, more speed, more money. On the Scout 425 LXF it is not that simple, because the package that is faster at the top of the rev range is not the package that is faster off the line. Scout publishes tested bulletins for both, and they disagree with each other in a way that puts the decision back in your hands.
A 42-footer in Scout's carbon band
The 425 LXF measures 42 feet 2 inches with a 13-foot-1 beam, draws approximately 28 inches and weighs 17,064 pounds dry without engines. It sits in Scout's S-Class - the yard's designation for its luxury models from 33 feet up - and is built in what Scout calls Carbon Epoxy Construction, with carbon fiber and E-glass as the primary reinforcements in an epoxy infusion, over the yard's double stepped bottom.
Transom deadrise is 22 degrees, the same figure Scout runs on the 357 LXF, the 400 LXF and the 435 LXF Li-Ion. Fuel capacity is 545 gallons, fresh water 66 gallons and the holding tank 16. Maximum rated power is 1,800 horsepower.
That last number comes with something Scout does not always provide: a recommended cruising horsepower of 1,200. The 357 LXF lists that figure as TBD and the 400 LXF does not publish it at all. On the 425 you get a manufacturer's number to plan against, which matters more than it sounds when you are deciding how much engine to hang on a transom.
Triple Mercury 600 V12 Verados
Scout's bulletin for the triple 600 package was run with Verado 12 stainless props in 37p/33p/37p, with the Seakeeper aboard.
Top speed is 72.5 mph at 6,403 rpm. Zero to 20 mph takes 5.26 seconds, zero to 30 takes 7.88. The best fuel figure in Scout's table is 0.75 mpg at 41.6 mph, at 4,000 rpm.
There is one absence worth naming. Scout does not publish an estimated range on this bulletin. The 435 LXF Li-Ion and the 530 LXF both carry a published estimate; the 425's triple-600 sheet does not, and we are not going to invent one for it.
Quad Mercury 400 V10s
The quad bulletin was run with Revolution 4 stainless props in 25p, also with the Seakeeper aboard.
Top speed is 69.6 mph at 6,400 rpm - 2.9 mph slower than the triples. But the acceleration numbers go the other way: 4.61 seconds to 20 mph and 7.16 seconds to 30, against 5.26 and 7.88 for the triple 600s. Best economy in Scout's table is 0.79 mpg at 44.9 mph (4,500 rpm), with 0.78 mpg at 38.8 mph.
What the two bulletins actually tell you
Put them side by side and the usual hierarchy breaks. The triples own the top end. The quads own the launch and the peak economy figure. Neither package is the compromise choice, which is why this decision deserves more thought here than it does on most hulls in the range.
The practical translation is about how you use the last third of the throttle. If your day is defined by a long run to the fish and back, the triples give you 2.9 more mph to spend on it and one fewer engine to service, prop and winterize. If your day is defined by short hops, running tides and getting on plane with a loaded boat, the quads put you at 30 mph almost three-quarters of a second sooner and spread the thrust across four engines.
There is also a weight consequence that Scout publishes plainly. Rigged dry weight with triple Mercury 600s is approximately 20,844 pounds; with quad Mercury 400 V10s it is approximately 19,844. A thousand pounds is not nothing on a lift.
The cabin is a real cabin
The console cabin on the 425 does more than most center consoles at this length. Scout fits an enclosed head area with a full-size toilet and a hot and cold sink, a separate enclosed shower area with its own door and sump, a sitting area with a convertible berth, a galley sink, a single-burner glass cooktop, a microwave and a drawer refrigerator. There is a 32-inch LED TV, port and starboard windows with privacy shades, LED accent lighting and AC outlets in both the head and the berth.
The 12,000 BTU air conditioner is standard and runs off the standard 8 kW generator, which sits on its own 26-gallon diesel tank. That is a genuinely different proposition from a boat where air conditioning is an option and shore power is the only way to use it.
One honest gap, because it is the sort of thing that changes a decision: Scout publishes cabin headroom, head standing height and berth sleeping length for the 400 LXF, the 435 LXF Li-Ion and the 530 LXF, and publishes none of the three for the 425. If standing room below matters to you, stand in it before you order.
Fishing and deck
The fishing package is not an afterthought. Port and starboard floor fish boxes hold 92 gallons each and discharge overboard through diaphragm pumps. The cockpit baitwell is 80 gallons. There are ten stainless flush-mount gunnel rod holders and eight pull-up flush-mount cleats, a full transom walk-thru platform with an Armstrong dive ladder, a synthetic teak swim platform and an aft under-deck systems room.
The dynamic leaning post is the feature that gets talked about: an electrically actuated fiberglass drawer cooler, a summer kitchen with grill, sink and cutting board, and swivel barstools that stow away. It is the clearest expression of what this boat is trying to be - a serious fishing platform that converts into somewhere people want to spend a Saturday.
A port-side hydraulic beach platform is standard. An upper helm flybridge and a 12 kW generator upgrade sit on the option sheet, as does a hardtop deletion credit.
The paperwork note
Both performance bulletins predate the current spec sheet. Both list 16,800 pounds dry without engines, and the triple-600 bulletin lists 500 gallons of fuel. The current model page and model flyer list 17,064 pounds and 545 gallons. We have used the current figures throughout. If tank size or dry weight decides your purchase, get the figure confirmed on the build sheet for your model year.
Scout's own model page also currently flags limited availability for the 425 LXF, which is worth factoring into a shortlist.
Who this boat is for
The 425 LXF is for the owner who has stopped pretending the family will tolerate a boat with no head. You get 92-gallon fish boxes and an 80-gallon baitwell on one side, and an enclosed shower, a galley and air conditioning that runs at anchor on the other, without either half feeling bolted on.
It is the wrong boat if you want the simplest possible systems package, because there is a diesel generator aboard with a tank and a service interval. The 435 LXF Li-Ion answers exactly that objection with a lithium house system in place of the genset. And if standing headroom below is the thing you cannot compromise on, the 400 LXF publishes 6 feet 4 inches of it and the 425 publishes nothing at all.
Everything else here is settled at the order desk, and the biggest question on the sheet is which of two very different engine packages you want under the hardtop.