Cleaning And Inspection - Mercury MerCruiser MCM 454 Mag MPI Service Manual

SERVICE MANUAL NUMBER 23
5. If bearings require replacement, remove bearings from shaft with Universal Puller Plate
6. If rear seals require replacement, press seals from bearing housing with an appropriate

Cleaning and Inspection

1. Clean metal parts in solvent and blow dry with compressed air.
IMPORTANT: Do not spin bearings at high speed when drying with compressed air,
as bearings may be scored.
2. After cleaning, apply a coat of light engine oil to shaft and bearings to prevent rust.
3. Clean all gasket material and sealer from sealing surfaces.
4. Inspect bearing housing. Examine surfaces (where bearings contact housing) for evi-
5. Inspect seals in bearing housing.
6. Inspect pump shaft bearings.
7. Inspect pump shaft for grooves in surface where seals contact shaft. Also inspect sur-
8. Inspect pump body.
9. Inspect inner and outer wear plate.
10. Inspect pump impeller for wear on sides and tips of blades. Also inspect blades for
11. Inspect pump pulley.
12. Check drive belt for excessive wear.
Index
90-861326--1 MARCH 1999
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and an arbor press. Bearings must be replaced, if removed.
tool.
dence of outer races turning in housing.
face where bearings contact shaft for evidence of inner races turning on shaft.
cracks in area where blades flex. Replace impeller if blades have taken a set (remain
in curved position).
SEAWATER COOLED MODELS
72659
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