Regal 53 SC Owner's Manual page 459

(SELF CLEANING RAW WATER STRAINER SYSTEM)
When doing maintenance work or troubleshooting be
sure to deactivate the AC and DC power.
If the unit does not fi lter debris properly check the fi lter
basket blades for wear. The four cutter blades are not en-
gineered to be knife sharp. Inspect them for wear; they
should extend slightly above the impeller surface.
To replace the shaft seal the impeller must be removed.
Unscrew the impeller. Note it is a left-hand threaded
component.
SEA CHEST
Install a new shaft seal carefully. The seal components
are delicate and can be scratched which will result in non
sealing. Push seal components gently but fi rmly in place.
First install the rubber cup with ceramic facing away from
the motor; then install carbon with smooth surface fac-
ing ceramic. The spring tensions the assembly after the
impeller is reinstalled.
If dripping water is noticed tighten hose clamps. Also,
make sure the drain plug and basket clamps are tight.
Use the follow wiring diagram to help troubleshoot any
electrical problems.
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Chapter 9