Mercury 225 EFI, Service Manual

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FUEL PUMP
Page 3A-10 90-884294 OCTOBER 2001
Cleaning/Inspection
1. Clean fuel pump housing, check valves, pulse chamber and pump base in solvent and
dry all but check valves with compressed air.
2. Inspect each check valve for splits or chips.
3. Inspect boost springs for weakness or breakage.
4. Inspect fuel pump housing, pulse chamber and base for cracks or rough gasket sur-
face and replace if any are found.
5. Inspect fitting on fuel pump housing for loosening or any signs of fuel or air leaks. Re-
place or tighten fitting if a leak is found.
Reassembly/lnstallation
ASSEMBLY
NOTE: The new repair kits contain check valves made of a plastic material, impervious
to damage from additives. When repairing the fuel pump discard old rubber and small
plastic check valve disks, and install one new plastic disk under each retainer. Caution
must be taken not to push the check valve retainer to tightly against the check valve, this
may cause valve to deform.
b
57861
a
CORRECT INCORRECT
a - Check Valve Retainer
b - Check Valve (Plastic)
1. Insert retainer through plastic check valve.
23601
a
b
a - Retainer
b - Plastic Check Valve