Cleaning/Inspection; Reassembly/Lnstallation - Mercury 225 EFI Service Manual

3.0 litre work, electronic fuel injection

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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.

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.

1. Insert retainer through plastic check valve.

Check Valve Retainer

Check Valve (Plastic)

Plastic Check Valve

90-884294 OCTOBER 2001

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