The engine room is not just the engine, but also home to fuel pumping and polishing, water-maker, AC/DC generator, invertors, power distribution panel, hydraulic tank and pumps, 3D printer, CNC table and loads of tools.
The fuel tank manifold is on the forward bulkhead and distributes and draws from six fuel tanks in the floor of the cargo hold. Including the day tank, Seeker's total fuel capacity is 1700 gallons, giving her range of over 5000 miles with opportunistic assistance from the wind.
Tank Capacities in Gallons
Port Forward: 317
Port Aft: 313
Starboard Fwd: 211
Starboard Aft: 312
Port Keel: 237
Starboard Keel: 235
Day Tank: 85
TOTAL: 1710