Jabsco Mod 31750 Pump Repair
My Mod # 31750 Jabsco pump recently failed - it would pump but not shut off.
I suspected the Press Sw but found parts are no longer available.
Another forum post I found indicated that the Press Control for these variable speed pumps have a transistor control that fails. The transistor part # is a Allegro A1321EUA hall effect transistor. The transistor is discontinued but I was able to find NOS parts online / eBay at a few $/ea.
Reported fix - With a sharp utility knife you can split apart the sensor and replace the transistor. Re-seal it with epoxy after replacement.
When my part arrives and I get a chance to do the fix I'll update my results.
2008 MS 34 HT Trawler