after several years of a slight fuel
injection pump leak and multiple fruitless attempts to fix it (2 or 3 seal kits so far) it finally seems to have gotten bad enough to allow correct diagnosis as a leaking fuel
The original Westerbeke
11383 part number is obsolete, replaced by Westerbeke
37323, with a 1/8-27 NPT thread and a normally open switch, closing at 10 lbs. It is $18 at TOAD Marine
Supply, but they won't ship here. I did a bit of Googling and found a oil
pressure switch from a 1985 Chevy C10 truck with a 350V8 will work. Closing pressure is a little lower at 4+/-2 psi, but it seems to work as intended. The neck is a little longer as well which just made installation
a bit easier.
Part numbers are S371 (or S371P) from BWD or Duralast PS115. I believe a Motorcraft SWG1702 may work as well. Less than $10 and in stock at the local auto part store.
Time will tell, but I am hopeful this may be the end of my leak. It has been a real nuisance as enough fuel leaks
out of the pump that I have had to bleed it if it sits too long.