Mercury Optimax 200/225 from year 2000 Service Manual., Page 236Get this manual

Mercury Optimax 200/225 from year 2000 Service Manual., Page 236

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FUEL PUMP
Problem: Lack of Fuel Pump Pressure
An anti-siphon valveAir in fuel lineA dirty or clogged fuel filterThe fuel pickup in fuel tank is clogged or dirtyWorn out fuel pump diaphragm