The pressure switch looks so elegant, yet it is just a mechanical micro-switch with two stab on terminals housed inside the finned outer housing. This housing is made to look like a high tech heat dissipation device. Looks as if there is a power transistor inside carefully monitoring the pressure with a high tech, precision, solid state sensor.
ITT Jabsco P/N 37121-0000 or 37121-0010 (both 20/40psi)
found on e-bay in 2013 for $40.00 They are not USCG approved.
They look just like the 1980, 40psi unit above.
I tried the 20psi switch and it just does not provide adequat flow.
Motor name plate indicates that a 6.25 AMP Slow Blow should be used for this pump. On this boat there is just the 10 amp circuit breaker on the main distribution panel. I added an inline fuse holder and 6.25 A fuse so that the battery does not die the next time the pressure switch fails to open or the motor stalls out. (The motor got very hot and had to be replaced once already.)
I found the 6.25 Amp fuses at West Marine, as none of the three local auto parts houses (NAPA, Carquest, and AutoZone) have them. Carquest ordered a box of 5 for me at $2.51 per fuse. I did not have to wait long as it started acting up in three days.Click Here. from 2010 to 2013 the pressure switch was 2006 version installed in 2010. It still acts up when the battery voltage goes low or lots of aluminum sludge shows up at the intake. Next I hope to try the 10psi cut in with 20 psi cut out.
Click here for assembly diagram for the 2006 version "Universal Switch Replacement Kit"
