Got the boat with that setup over 20 years ago and never thought twice about it. Never an issue. Parrelel switch is a spring loaded toggle on the dash which when held to "on"connects both batteries momentarily for startup when 1 battery is weak.
One of the batteries for stbd engine and everything else, the other battery seems to be for port engine only. and I have a parallel switch on dash.Will disconnect bilge pumps to monitor drainage. Pulled radio faceplate off so I assume that keeps it off. Mikes method is next.Thanks guys
This 280 Regal never had a battery switch and I never had an issue so leave well enough alone. Our Grady White has a battery switch that is turned off when not in use.. I'm still assuming the drain was from a cabin light switched on but bulb was not tight so it didn't light. Does not sound like...
UPDATE, ha e not had ti.e to ck anything but today it seems to have stopped the draining. Gotta ask wife if she has been leaving anything on..??? Charlie
1988 Regal 280 twin 5.0LX with alpha drives.Replaced battery that I assumed was bad. It was not. The replacement is constantly getting drained to zero. Every switch and light is turned off.Fridge is on shore power. I'm puzzled??? Where to look?? Nothing is on. Charlie
Quadrajet I believe, new tank.Started right up today and ran for a while with no issues. I have never had an issue with this motor so never changed carb filter.May do that next if I can find the filter I bought a number of years ago. If I dont find it I can just clean the current one if dirty...
Outboard tank vent was open. I assumed closing the vent would slow the flow so tried that too. No start until I held carb open. Bad fuel tanks forced me to use outboard tank for now.Fuel is new, separator is new.Thanks for the reply, Charlie
1988 Merc 5.0 XL 4bbl carb. 20+ years and never an issue starting .Had to switch over to an outboard fuel tank this season .Started and ran fine 1st time out. Next day started right up and stalled shortly after.Would not restart. Checked fuel water separator and fuel usually drips out when...