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I've just bought a 1999 Proline 2950, twin 5.7l mercrjuiser with bravo III outdrives. Anyways, it's got raw water AC (any tricks to get that working??) and a raw water flush head with holding tank for pumpout and macerator for >3 mile discharge. So, there is a switch on the electric panel for the macerator (it works). My problem is I cannot find any kind of switch to run / activate the raw water pump which appears to maintain pressure to flush head. There is no switch of any kind in the head, and nothing labeled head on the white-board.
Help! 4th of July is coming and we want to use the boat for a gang!
Best,
Bill Flanagan

wflanagan wrote:I've just bought a 1999 Proline 2950, twin 5.7l mercrjuiser with bravo III outdrives. Anyways, it's got raw water AC (any tricks to get that working??) and a raw water flush head with holding tank for pumpout and macerator for >3 mile discharge. So, there is a switch on the electric panel for the macerator (it works). My problem is I cannot find any kind of switch to run / activate the raw water pump which appears to maintain pressure to flush head. There is no switch of any kind in the head, and nothing labeled head on the white-board.
Help! 4th of July is coming and we want to use the boat for a gang!
Best,
Bill Flanagan

Hi Bill: I have a 1993 Proline 2950, so your setup might be different. However, here's how my head flushing system is setup:
On the circuit breaker panel in the cabin (the one on the wall between the head and the entrance to the bunk under the helm), there is a switch marked "Macerator". That will activate the macerator pump, as you know. Directly below that switch on my panel is a switch marked "Head". That activates the raw water pump system, which has a pressure switch in the circuit. So, it will initially start pumping when you turn it on, until there is pressure in the line. Then, it will activate the pump to flush the head when you step on the flushing lever on the side of the head, and it will shut off when you lift your foot off of the lever. If your switch panel doesn't have that "Head" switch, then maybe it is on another switch. My switch panel has spaces for two more switches below the "Head" switch. -- perhaps there is a switch on the side of the pump itself, or the pressure switch?? Access is through the small door below the switch panel. Another source of the switch could be on the helm switch panel, but that would be a bit unusual. If there is a spot on the switch panel marked "Head", but no switch, someone moved it. If there is not spot marked "Head", I don't have a clue what's up with that !

Hope this helps.

Jim --