Hose from Strainer Piping to Shaft Coupling

Pritch6397

Member
Joined
Jun 20, 2024
Messages
20
Fluid Motion Model
C-30 S
Hull Identification Number
FMLT2916C424
Vessel Name
Slow Ride
I was filling the engine fresh water strainer while the boat was on the hard and the seacock was closed I noticed that the water kept draining out. I then noticed that water was running out around the prop seal on the exterior. I then found there is a hose from the under side of the strainer piping to the shaft coupling that would allow the water to drain to the coupling and out around the prop shaft. I am just curious what the point of this hose is when obviously water can fill the coupling from the exterior around the shaft?
 
Its to keep the shaft bearings cool while running the boat.
 
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