Mercury MerCruiser D2.8L D-Tronic Service Manual page 700

SEAWATER COOLING SYSTEM
Inspection
1. Inspect bearing housing. Examine surfaces (where bearings contact housing) for
evidence of bearing outer racers turning in housing.
2. Inspect bearings for worn or defective condition. Examine sealed bearings for evidence
of loss of factory grease, or evidence of internal contamination by engine oil.
3. Inspect seals from bearing housing.
4. Inspect pump shaft for grooves in surface where seals contact shaft.
5. Inspect drive key on shaft.
6. Inspect surface, where bearings contact shaft for evidence of inner races turning on
shaft.
7. Inspect impeller splines and shaft splines.
8. Inspect pump body.
9. Inspect cam for scratches or gouging.
10. Inspect pump impeller for wear on sides and tips of blades.
11. Inspect blades for cracks in area where blades flex.
12. Replace impeller, if blades have taken a set (remain in curved position).
13. Replace all parts that Do NOT conform to standards.
Page 6A-18
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002