Yes, mine is the same as yours rslifkin, small blowers, one under each mercruiser and one low in the lowest part of the bilge. I ran the boat for almost a full season before looking under the engine room shelf, and then found the hoses completely useless, fully rotted through........... I usually run the blowers non stop on coastal trips because I kept forgetting to put them on when coming back to the berth. Maybe this is a bad practice? ........ Both starter batteries are new and also load tested well, and I only noticed the voltage drop at the helm voltmeter, and also at the CB panel voltmeters, so should check at the alternators I think. It takes a long time for the voltage to return to normal, maybe an hour after starting a trip, so I will check wiring size and connections. .....O C Diver I do have an ER fire suppression system but didn't really understand re the shut down system...could you explain further?