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09-01-2016, 02:33 PM
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#1
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Ensign
Join Date: Aug 2016
Location: Texas
Posts: 6
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Bilge pump won't stop running
So on my 2003 2100 SD the Bilge pump is constantly running and killed my battery over night. Could this be caused by it getting clogged up, or do I need to start looking for a replacement?
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09-01-2016, 03:43 PM
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#2
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Admiral
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,222
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Well if the pump is running and moving water there is nothing wrong with it. The pump gets power from two sources; the helm switch or the float switch. I am assuming you did not leave the helm switch on so the float is either suck up or internally shorted.
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1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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09-01-2016, 05:02 PM
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#3
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Lt. Commander
Join Date: May 2014
Location: Cobourg, Ontario, Canada
Posts: 229
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If it's an intermittent start/stop over and over again, it could be water in the drain hose running back down into the bilge and tripping the float (or sensor). That will cause it to start up to try and push that drain back water outside.
If you have a back flow valve (not really recommended) on the drain line, then this will not happen.
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09-01-2016, 05:32 PM
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#4
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Admiral
Join Date: Mar 2012
Location: Lake Powell
Posts: 1,613
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Probably a stuck float ...Manipulate it and see if it stops running. If not, a new pump is a cheap solution.
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09-01-2016, 08:31 PM
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#5
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Ensign
Join Date: Aug 2016
Posts: 4
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Not exactly your set up is, however I have the float separate away from the pump. If this is your set-up then it would appear that your float switch is stuck closed. Similarly, if you have a one piece construction the same condition may apply.
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09-01-2016, 08:32 PM
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#6
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Ensign
Join Date: Aug 2016
Posts: 4
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Could someone please advise what the RPM's would be most suitable for a Mercruiser 5.7 L engine, Thanks,
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09-01-2016, 08:39 PM
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#7
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Admiral
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,222
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Quote:
Originally Posted by Fred 1956
Could someone please advise what the RPM's would be most suitable for a Mercruiser 5.7 L engine, Thanks,
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You should start a new thread for this topic. Also not sure I understand the question, are you asking the WOT for this engine? 4400-4800 rpm.
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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09-01-2016, 08:49 PM
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#8
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Ensign
Join Date: Aug 2016
Location: Texas
Posts: 6
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Thanks for the reply's, I' m going out after work to mess with it. The pump constantly runs even after i turn power off to the boat.
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09-02-2016, 12:53 AM
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#9
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Admiral
Join Date: Mar 2012
Location: Lake Powell
Posts: 1,613
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The bilge pump is hard wired to the battery. Even if you turn the switch off it will still run. I'd replace it to get a fresh start.
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09-02-2016, 03:19 AM
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#10
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Admiral
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,222
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Quote:
Originally Posted by Phillbo
The bilge pump is hard wired to the battery. Even if you turn the switch off it will still run. I'd replace it to get a fresh start.
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It is directly wired but through a float switch which is either stuck in the up position or internally shorted and this needs to be fixed first. A bilge pump is designed to run dry without damage.
__________________
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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