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2013 VLX with 350 hp What could be causing voltage to intermittently drop to 12.3-12.5v (normally runs 13.6-14.2v) while engine is running? Voltage drops seem to be onset by engine loads (surfing, pulling wakeboarder with ballast, etc.). This weekend we had a few long surf sessions followed by a slow ride back due to rough water. Voltage got below 11.5v triggering warning lights/sounds. Not running stereo or lights but did use blower around engine starts and ballast pumps when setting up surf and wakeboard sessions. Oh and the touch screen freezes but I take that is related to the voltage drops. Running two 750 CCA Super Start AGM connected via a On/Off/Combined switch an BEP voltage sensing relay. Both batteries are cranking batteries - didn't have a Deep Cycle battery when i replaced them in June. I notice when i put the charger on one battery, initially the charger reads 13.9 - 14.1v but after several minutes of charging (2A mode), it reads 60-70% charged. Is this caused by the VSR kicking in? Thanks for the help. Mark

I’ve been dealing with this misfire issue that seems to show up at idle speeds. Took the boat out today and it didn’t show any active codes (this was the third warm up and cool down cycle) but it did seem to run tough at idle a bit. The dash read 12.5-12.8 volts at idle. I checked the the batteries last night before the trip today and they were both 12.6 v. While cruising the dash only read 13.1-13.3 volts. Could this be my issue? How do I test my alt? Should I just replace it?

So since I got my boat, I've noticed that the voltage to both the PP and MDC display is lower than is ideal. With key on and engine off, my PP display says 10.0-10.3V. Measuring at the battery gives me a solid 12.6-8v based on my cheapie harbor freight DMM. Measuring between the hot lead on the ignition switch and the ground bus bar under the dash shows 12.5v. About what I'd expect and rules out bad grounds, bad batt connections. When I key on, voltage measured between any of the switched posts on the ignition switch and the bus bar shows about 10.5v. Not what I'd expect. So the question I have is this. Is my ignition switch faulty, or is there something downstream of the switched posts on my ignition switch causing this? Boat runs great other than that. I'm suspecting that I'm going to have to pull the ignition switch and disconnect wires one at a time to find the offending resistance. The only stuff that comes on ignition is: Fuel pump ECM PerfectPass Servo PerfectPass Display MDC Gauges Depth finder and transducer Gotta be one of those if not the switch itself.