1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 169Get this manual
6Remo ve plat and gasket s(Figure 12) 7Using water pump retaining bolls and screwdrivers, lift seal carrier up and off drive shaft(Figure 13) 8Remove (a lld disca rd) "0" ring and oil seal from seal carn er a Impeller
b Drive Key
Figure 11Impeller and Drive Key Removal
a Seal Carrier
Figure 13Seal Carrier Removal
CLEANING and INSPECTION
IClean all wllter pump paris with solvent nd dry wi lh co mpressed air2Inspeci plale and wa ler pump bod for grooves andor ro ugh surfacesIMPORTANT: When performing gear housi ng repairs, that require removal of water pump Impeller, II is recommended that the Impeller be replaced If It Is necessary, however, to re- use impeller, DO NOT Install In reverse to original rotation, or premature impeller failure will occurOriginal rotation Is clockwise