2006 Johnson SD 3.5 HP 2 Stroke Outboard Service Manual, PN 5006562, Page 106Get this manual
GEARCASE WATER PUMP
Inspection
Check impeller for overheating, hub separation and visible signs of wear or damageCheck impeller cup and plate for scoring, distortion, and impeller material transferInspect housing for cracks or meltingInspect water intake screen
Assembly
Position the water intake screen in the gearcase with tabs facing up22291
3.5 Model 1Water intake screen