Posts: 41
Threads: 9
Joined: Jun 2022
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Home Port: Longboat Key, FL
Vessel Info: 2020 53 Fly
CAT 12.9-1000 Straight Shaft
(11-05-2025, 11:22 AM)charley's angel Wrote: 43' Tiara With cummins diesels sat for a few weeks with dead batteries and now no reading om oil pressure, rpms, fuel level and others what could be wrong no engine data
Assuming batteries are now fully charged and holding voltage, I suggest disconnecting (or turning off battery selector) for a few minutes and then reconnecting. This should "reset" all systems and may correct your issue. Make sure both house and starting batteries are off or disconnected as either could be feeding different portions of the network. Hope this helps.
2020 53 Fly
CAT 12.9L-1000, straight shaft
Gulf Coast Florida
Posts: 41
Threads: 9
Joined: Jun 2022
Reputation:
2
Home Port: Longboat Key, FL
Vessel Info: 2020 53 Fly
CAT 12.9-1000 Straight Shaft
OK, new batteries but what voltage do you have at terminals? You should have a resting voltage above 12.6 volts. Test after battery chargers have been off and the "surface charge" of the batteries has dissipated. Turn off chargers and run something to "tax" the battery for a couple minutes before testing voltage.
Are you not seeing displays on Vessel View and dash gauges? If so, it is likely the engine ECM feeds that are missing but I would think that the ECM should reset with batteries off for a period of time.
2020 53 Fly
CAT 12.9L-1000, straight shaft
Gulf Coast Florida
43' Tiara With cummins diesels sat for a few weeks with dead batteries and now no rea
