Mercury Optimax 200/225 from year 2000 Service Manual., Page 232Get this manual
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FUEL PUMP
Normal 2-3 psi (13.720.5 kPa) Minimum psi (6.8 kPa) Normal 8-10 psi (41.054.8 kPa) Maximum 10 psi (68.5 kPa) Minimum psi (27.4 kPa)
NOTE: Electric fuel pump pressur