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Old 09-30-2019, 02:38 PM   #1
Lt. JG
Join Date: Apr 2017
Location: Collegeville, PA
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Default Bilge pump operation auto on or off by dash switch

Hi Folks,

I was told I could "toggle" automatic or manual control of my bilge pumps via some kind of a combination of the dash switch. I assume they meant a quick on-off type of combo, is that actually possible?
I do understand the bilge pump would have to include a float switch so, for argument's sake, let's say it does.

The boat is an SCR 2800 - 1997

As always,

Thank you all!!

1997 SCR 2800 Chestertown, MD Great Oak Landing Marina
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Old 09-30-2019, 03:18 PM   #2
Lt. JG
Join Date: Mar 2010
Location: Cincinnati OH
Posts: 47

Most bilge pumps I've seen have 3 wires, 1 ground , 1 lead for 12v that you can wire a float switch to control the off and on. And 1 lead you can run to your rocker switch to manually control the off and on.

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Mike O Cincinnati OH
(77 checkmate Jetboat)(85 Skeeter w/150blackmax)
(89 Bayliner 2455)(95 Bayliner 2855)
2000 Maxum 3700 scr
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Old 09-30-2019, 03:48 PM   #3
donald's Avatar
Join Date: Jun 2016
Location: Mn.
Posts: 450

You should have a switch at the helm that will turn the bilge pump(s) on and off.
There should also be a float switch for each pump that is connected directly to the batteries.
Hope this helps.
1995 Maxum 2400 SCR 5.7 A1 G2 LUNA DE MIEL
1988 Bayliner 2455 5.0 IO (sold)
1987 Seaswerl 18ft C. Cabin 4.3 IO(lost in fire)
1976 16ft. Tahiti 2.5 IO (sold)
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Old 09-30-2019, 04:04 PM   #4
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Join Date: Feb 2012
Location: Essex, Maryland
Posts: 8,365

The float gets direct power and not from the helm. Try lifting it to ensure the pump turns on. The helm switch bypasses the float and that switch is either on or off.
1997 2400 SCR
5.7 Vortec / Bravo 2

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Old 10-01-2019, 01:12 PM   #5

Join Date: Apr 2008
Posts: 5,011

Your model has a switch at the dash for the bilge pump. That is your Manual control. The bilge pump switch is on a dedicated hot circuit. In order to turn off the positive lead to the bilge pump switch you would need to turn off the battery switch itself.

In some models, the switch at the helm has [Auto-Off-Manual]. In that case, you typically leave it in Auto, which activates the positive lead to the float switch.
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