We purchased a two year old cruising cat with a Spectra
400 MKII watermaker
mounted under a bed
. It had always seemed unusually loud but maintained its water
making until this summer when it gradually failed.
Only 650hrs on the unit. Through troubleshooting over the phone
with the Spectra rep who installed it we determined that it was the death of the high pressure motor
which he says is very rare, and cost $2000 to replace. Upon doing the installation
of the new motor
I noticed there was some weeping of water
from where the magnetic pump
attaches to the motor. He had me stop immediately and we determined the pump's seals
had failed, cost additional $650. Ok, so what happened? It never had a leak that I noticed. While replacing the magnetic pump
I noticed that the new one has a 1/4" hole drilled into the housing but the old one did not. Without the weep hole, the pressure from the pump forced the water past the failing seals
, up the shaft of the motor and into the coils eventually shorting the motor and killing it. This would have been prevented had a weep hole been present by relieving the water pressure and providing an indication of pump seal failure through the drip. Anyone else kill their motor this way? Please PM me if so and maybe we can have a chat with the manufacturer.
So check your magnetic pump for the hole, (it may be around back) and if you don't have one I suggest contacting the installer and ask if you should have one. Might save you a few boat
bucks down the line.