1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 188Get this manual
5InSlali seal carri eras shown(Figure 2) 6, Apply sil ico ne sea ler on ends of di vider platePosition plaw in gear casco as sho wn(Figure 2)
IMPORTANT: When completing gear housing re pair, that requires removal of water pump Impeller, It is recommended that the Impeller be replacedIf it is necessary, however, to re-use the Impeller, DO NOT Install In reverse to original rotationor premature Impeller failure will occurOriginal rotation Is clockwise
aImpeller Drive Key
bImpeller
Figure 4Installing Impeller and Impeller Drive Key
I Sli.de down shaft to impellcrdrive keyAlign ke wIth ke ywa III the ce nter hub of impel lerand slIde impeller ver drive key (Figu re )
ACAUTION
A visual inspection of Impeller drive key MUST BE made to determine that drive key is on lIat of drive shalt after impeller is Installed If key has moved off flat of drive shaft, repeat Steps and