Learning the HARD way...
Join Date: Jan 2007
Location: Boston / Ft Myers Area
Thanked 320 Times in 311 Posts
Rep Power: 14
Two seals - one for the raw water side of the pump, and one for the engine (oil) side of the pump.
The raw water seal should be inserted as deeply into the pump body as it will go - right against the carbon bearing (bushing would be more accurate). The engine seal should be inserted just enough to fully be in the pump, but not so much that it blocks the weep hole.