Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 15-09-2017, 02:18   #31
Registered User
 
finefurn's Avatar

Join Date: Jan 2013
Location: Mason, NH
Boat: CRI E20, Hunter 27
Posts: 42
Re: Bilge Pump Running But Not Pumping

Had same problem. The pump hasn't run for weeks because of insufficient water in the bilge. I hit the float switch just to clear the whatever water that was there. Pump ran but no discharge. turned out check valve was stuck shuck. Valve was 10 + years old so time for replacement anyway. Something you never think of checking until a failure.
__________________

__________________
finefurn is offline   Reply With Quote
Old 15-09-2017, 13:29   #32
Registered User

Join Date: Mar 2016
Boat: Cal 39 MII Tall
Posts: 2
Re: Bilge Pump Running But Not Pumping

No one has mentioned the possibility of an air lock in the discharge hose. My boat has a similar problem that I haven't had a chance to look into, but I assume that I installed the hose badly. Perhaps there is a dip in the hose on the way to the overboard. Perhaps the anti-siphon loop isn't high enough? Going to do discovery soon, but I have assumed the problem is airlock.
__________________

__________________
sssprinkle is offline   Reply With Quote
Old 15-09-2017, 13:39   #33
Registered User

Join Date: Mar 2016
Boat: Cal 39 MII Tall
Posts: 2
Re: Bilge Pump Running But Not Pumping

Whoops, I see airlock has been mentioned. I'm just going to slink back to my lurking cave...
__________________
sssprinkle is offline   Reply With Quote
Old 15-09-2017, 16:47   #34
Registered User
 
Scout 30's Avatar

Join Date: Oct 2014
Location: Florida
Boat: Scout 30
Posts: 2,551
Re: Bilge Pump Running But Not Pumping

Quote:
Originally Posted by sssprinkle View Post
Whoops, I see airlock has been mentioned. I'm just going to slink back to my lurking cave...
No slinking needed. Every input is appreciated.
__________________
Scout 30 is offline   Reply With Quote
Old 15-09-2017, 17:05   #35
Registered User

Join Date: May 2011
Location: Toronto
Boat: Sandpiper 565
Posts: 3,099
Re: Bilge Pump Running But Not Pumping

I worked on one motorboat where the bilge pump had burned out. Replaced the pump, new one ran fine, but water not draining. Removed pump, tried it in a bucket with a short hose, pumped like gangbusters.

So, I got a waterhose from the dock, pushed the hose nozzle into the discharge hose's pump end, and gave a couple of shots of pressurized water. There was a PTOO! at the other end (transom) and the hose ran free. Re-installed new pump and it was fine.

So in this case, it seems the discharge hose got plugged by marine growth I believe, and that blockage burned out the original bilge pump.
__________________
Lake-Effect is offline   Reply With Quote
Old 15-09-2017, 18:05   #36
Registered User
 
Scout 30's Avatar

Join Date: Oct 2014
Location: Florida
Boat: Scout 30
Posts: 2,551
Re: Bilge Pump Running But Not Pumping

Quote:
Originally Posted by Lake-Effect View Post
I worked on one motorboat where the bilge pump had burned out. Replaced the pump, new one ran fine, but water not draining. Removed pump, tried it in a bucket with a short hose, pumped like gangbusters.

So, I got a waterhose from the dock, pushed the hose nozzle into the discharge hose's pump end, and gave a couple of shots of pressurized water. There was a PTOO! at the other end (transom) and the hose ran free. Re-installed new pump and it was fine.

So in this case, it seems the discharge hose got plugged by marine growth I believe, and that blockage burned out the original bilge pump.
Wow, that's one I never thought of!
__________________
Scout 30 is offline   Reply With Quote
Old 21-09-2017, 07:51   #37
Registered User

Join Date: Apr 2015
Posts: 110
Re: Bilge Pump Running But Not Pumping

Quote:
Originally Posted by Scout 30 View Post
I came back home from evacuating for Irma & my Whale Supersub was running but not pumping. I jerked on the hose & it started pumping. Any idea what would cause this?
I bought 2 of the Supersubs .
The first failed on automatic within three months . I had to put a manual switch in . The second failed completely within six months .
I also had the problem with pump running but no suction . Shaking the pipe made it run but I had to do it many times over the months . Could no longer trust them so changed for different make .
__________________
bustermaw is offline   Reply With Quote
Old 21-09-2017, 08:01   #38
Registered User
 
Scout 30's Avatar

Join Date: Oct 2014
Location: Florida
Boat: Scout 30
Posts: 2,551
Re: Bilge Pump Running But Not Pumping

Quote:
Originally Posted by bustermaw View Post
I bought 2 of the Supersubs .
The first failed on automatic within three months . I had to put a manual switch in . The second failed completely within six months .
I also had the problem with pump running but no suction . Shaking the pipe made it run but I had to do it many times over the months . Could no longer trust them so changed for different make .
Thanks for the response. What pump did you change to & how's it worked out? This is also my second supersub. The motor on the first one locked up after about a year. It's great that they designed a pump that would fit a narrow bilge but only if it's reliable.
I've had a bunch of storm clean-up to do on top of getting caught up on work so haven't had a chance to mess with this but I'll get to it this weekend.
__________________
Scout 30 is offline   Reply With Quote
Old 21-09-2017, 08:10   #39
cat herder, extreme blacksheep
 
zeehag's Avatar

Cruisers Forum Supporter

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 17,979
Images: 56
Send a message via Yahoo to zeehag Send a message via Skype™ to zeehag
Re: Bilge Pump Running But Not Pumping

mine does this with cat fur.
oopsy
i had to change out my flapper switch once--about a week after purchase and install it quit oopsy..... the old mercury ones were so much more reliable (yes i still have one intstalled and functional )
donot place anti backflow valves/traps in line. they fail.
zeehag is offline   Reply With Quote
Old 21-09-2017, 08:39   #40
Registered User

Join Date: Apr 2015
Posts: 110
Re: Bilge Pump Running But Not Pumping

Quote:
Originally Posted by Scout 30 View Post
Thanks for the response. What pump did you change to & how's it worked out? This is also my second supersub. The motor on the first one locked up after about a year. It's great that they designed a pump that would fit a narrow bilge but only if it's reliable.
I've had a bunch of storm clean-up to do on top of getting caught up on work so haven't had a chance to mess with this but I'll get to it this weekend.
I changed to cheap Rule copies from China for a third of the price .
They've been working for a year now with no worries at all . Much better with the built in mechanical float than the Supersub sensor.
As they where so cheap I installed two more as backup but I have to say these have not given me a moment's worry , unlike the Supersub .
__________________
bustermaw is offline   Reply With Quote
Old 21-09-2017, 08:50   #41
Registered User
 
Terra Nova's Avatar

Join Date: Apr 2007
Location: Marina del Rey, California
Boat: Freya 39 cutter- Terra Nova
Posts: 3,788
Re: Bilge Pump Running But Not Pumping

No matter which submersible pump you choose, if you do a poor installation with traps in the line, don't expect it to work properly.
__________________
1st rule of yachting: When a collision is unavoidable, aim for something cheap.
"whatever spare parts you bring, you'll never need"--goboatingnow
"Id rather drown than have computers take over my life."--d design
Terra Nova is offline   Reply With Quote
Old 21-09-2017, 08:53   #42
Registered User
 
Scout 30's Avatar

Join Date: Oct 2014
Location: Florida
Boat: Scout 30
Posts: 2,551
Re: Bilge Pump Running But Not Pumping

Quote:
Originally Posted by bustermaw View Post
I changed to cheap Rule copies from China for a third of the price .
They've been working for a year now with no worries at all . Much better with the built in mechanical float than the Supersub sensor.
As they where so cheap I installed two more as backup but I have to say these have not given me a moment's worry , unlike the Supersub .
Rule has a copy of the SuperSub that I might try next although I'm thinking that changing to a self priming diaphragm type pump is probably the best solution.
__________________
Scout 30 is offline   Reply With Quote
Old 21-09-2017, 09:02   #43
Senior Cruiser
 
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 6,126
Re: Bilge Pump Running But Not Pumping

Quote:
Originally Posted by Scout 30 View Post
Rule has a copy of the SuperSub that I might try next although I'm thinking that changing to a self priming diaphragm type pump is probably the best solution.


It is, and it keeps all of the electrical stuff out of the bilge water.
__________________
Sailmonkey is offline   Reply With Quote
Old 21-09-2017, 09:09   #44
Registered User
 
Scout 30's Avatar

Join Date: Oct 2014
Location: Florida
Boat: Scout 30
Posts: 2,551
Re: Bilge Pump Running But Not Pumping

Quote:
Originally Posted by Terra Nova View Post
No matter which submersible pump you choose, if you do a poor installation with traps in the line, don't expect it to work properly.
I'm seriously gonna take a look at what it would take to change the current hose track although it should be noted that my bilge pumps have worked properly for the 17 years I've owned the boat including the last couple of years with this pump. It appears that the current problem is related to the pump itself.
__________________
Scout 30 is offline   Reply With Quote
Old 21-09-2017, 09:13   #45
Registered User
 
Terra Nova's Avatar

Join Date: Apr 2007
Location: Marina del Rey, California
Boat: Freya 39 cutter- Terra Nova
Posts: 3,788
Re: Bilge Pump Running But Not Pumping

Quote:
Originally Posted by Scout 30 View Post
...It appears that the current problem is related to the pump itself.
Not from here it doesn't.
__________________

__________________
1st rule of yachting: When a collision is unavoidable, aim for something cheap.
"whatever spare parts you bring, you'll never need"--goboatingnow
"Id rather drown than have computers take over my life."--d design
Terra Nova is offline   Reply With Quote
Reply

Tags
bilge, bilge pump

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Jabsco not pumping sea water akpiperandjane1 Plumbing Systems and Fixtures 7 10-07-2016 18:00
Injector pump not pumping to 2 injectors msponer Engines and Propulsion Systems 21 06-12-2015 09:23
Mast pumping and running backstays Ded reckoner General Sailing Forum 13 08-03-2015 22:38
Head Not Pumping Out Completely Tori Plumbing Systems and Fixtures 11 21-07-2011 10:38
Not Pumping Diesel Overboard ? SvenG Construction, Maintenance & Refit 21 19-06-2010 17:45



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 00:44.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.