1981 Johnson/Evinrude 4HP Outboards Service Manual, Page 57Get this manual
b Remove impeller roller and slide impeller plate off drive shaft See Figure 6-3A Remove and discard water tube grommet from impeller housing coverSee Figure 6-3A 04
1Drive shaft 2Impeller housing cover Impeller pin
Impeller Impeller Impeller Impeller Impeller
housing drive pin plate housing cup
Figure 6-3ARemoving Water Pump Assembly
c Remove intake screen from gearcase See Figure 6-4d Inspect components for wear deteriorationand replace as necessaryand
Figure 6-5Water Pump Compents