shaftcouplinginsidetheboat.Thegroundbrushisthenconnectedtothecommonground
terminalonthekeelwithatleasta#10gaugestrandedcopperconductor.
23:00UNDERWATERCORROSION(Cont'd)
23:04ELECTRICALSWITCHES:Electricalswitchesandhardwareshouldbecheckedto
assurethattheyareoperatingproperly.Anohmmetercanbeusedtocheckthatall
switchesareopeningandclosingproperly.Aswitchthatdoesnotshutoffcompletelycan
easilycauseastraycurrent.
Thefollowingswitchesandhardwareshouldbecheckedforproperoperation:
Mainbatteryswitch
Enginekeyswitch
Blowerswitch
All12voltDCpanelswitches
100voltACpanelswitchesandaccessories
Batterychargeindicator
Floatswitchesforbilgeandsumppumps
Note:Reversepolarityatbilgepumpwiringisacommoncauseofstraycurrentcorrosion.
Anywiringconnectionsmadeinbilgewaterorwetlocationsshouldbewaterproofedwith
heatshrinktubing.
23:05EXTERNALFACTORS
:Externalaswellasinternalfactorscanalsocontributeto
corrosionofunderwaterhardware.Someofthemorecommonexternalsourcesincludewater
velocityandturbulence,pollutedwater,electricalleaksatshorepowerinstallations,
improperuseofportablebatterychargersandelectricalleaksfromadjacentboats.
24:00FRESHWATERSYSTEM
PlumbinginSabreyachtsmeetsorexceedsmarinestandardsandutilizesFDAapprovedand
corrosionresistantmaterialthroughout.
24:01WATERTANK
:Thewatertankhasaflushmounteddeckfillplate.Toremoveor
installthefillcover,alwaysusethespannerwrenchprovided.Usecautionwhenfilling
thewatertanktoinsurethatthetankisnotoverfilled.Excessivepressureresultsif
waterisallowedtofillthefillpipewhichmaybedamagingtothesystem.Gravityfeed
only.
Awidemouthaccesscoverisremovableforinspectionandcleanoutofthesystem.Water
leftinatankforalongperiodoftimewillbecomestale.Tanksshouldbepumpedout
ifthisoccurs,andcleanedwithabakingsodaandwatersolutionfollowedbyrinsingwith
freshwater.
Failureofpumptopumpwatermaybeduetoacloggedwaterfilterlocatedeitherinternal
orexternaloftank.
24:02VENT
:Thefreshwatertankisventedforwardintotheanchorwell.This
protectsfromsaltwatercontaminationwhentheboatheelsover.
24:03LEAKS
:Ifthewaterstoragetankappearstobeleaking,checkthatthewater
inlethoseissecureanddryatthedeckfittingandatthetank.Alsocheckthevent
lineandoutlethoseattheirconnections.Leakshereoratotherfittinglocationsmay
beovercomeberefittingandtighteningthehoseclamps.
24:04PRESSURIZEDWATERSYSTEMS
:Boatswithpressurizedwatersystemshaveonoff
valvesatthemouthofthefootpumpfaucet.Thevalveisopenedbyturningittothe