Hi -
I replaced both the fuel lift pump and the low pressure fuel pump on my 2001 Utopia 185 200HP since the boat would bog down at high throttle.... worked like a charm. see attached pic
1. low pressure fuel pump ( hangs vertically starboard side) : Automotive Authority LLC Electric Fuel Pump for Mercury & Mariner Outboards 855843 2, 8M0047624
2. Fuel lift fuel pump ( sits horizontal ) , comes with fuel filter
Quantum-Electric-Fuel-Pump-Mercury-Marine-Outboard-Replaces-885555T03-880001A03/788478386
3. there is another high pressure fuel pump in the vapor separator which I did **not** replace ;
Automotive Authority LLC Fuel Pump for Mercury Optimax 75 80 90 115 125HP DFI Fuel Pump 2003-15 888725T02, 888725T1, 888725T 1
other help:
www perfprotech com mercury-marine-parts-catalog/umodel/23316