No raw water flow after attempt to winterize - What happened - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 01-09-2008
Pamlicotraveler's Avatar
Senior Member
 
Join Date: Aug 2006
Location: Creedmoor NC
Posts: 555
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 8
Pamlicotraveler is on a distinguished road
No raw water flow after attempt to winterize - What happened

OK...I decided to be "smart" and run some propylene glycol (pinkstuff) through the raw water intake.

Before I did I started the engine and confirmed water flow. Stopped the engine, disconnected the intake hose (after turning off the seacock of course) and put it into a bucket of PG.

I started the engine expecting it to pull the pinkstuff in but it didn't. So after another try I reconnected the hose to the seacock (and turned the seacock on!). I started the engine to see if water would flow and it didn''t.

So what has happened? It sounds like there is an airblock or something. I didn't know that was something to worry about and don't know how to bleed the air out of a raw water line. If it's not that, I guess my raw water pump just happened to fail at that particular point.

Any ideas?....what should I try next?

Thanks all!
__________________
Twenty years from now you will be more disappointed by the things y%^&*.....oh never mind. 90% of the people on sailing forums already use that as their signature! I'm not a conformist.
Reply With Quote Share with Facebook
  #2  
Old 01-09-2008
capngregg's Avatar
Shaken-not Stirred
 
Join Date: Feb 2007
Location: Carrollton, Texas
Posts: 118
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
capngregg is on a distinguished road
Cool

It could be that the lift pump did in fact fail at that exact moment however it probably (hopefully) isn't the case. Once the siphon is broken a fair amount of air will enter the system but remember that your raw water inlet and the lift pump are usually below the boat's waterline. (depending on boat model, etc.) so now you just have a bucket of fluid with no pressure to reprime the pump.

How long did you let your engine run before shutting it down? When is the last time you replaced or inspected your raw water pump? Supplying the fluid to the engine under a standing fluid column (gravity feed) should reprime the pump.
__________________
Opportunity is missed by most people because it is dressed in overalls and looks like work.
T.A.E.
Reply With Quote Share with Facebook
  #3  
Old 01-10-2008
lbdavis's Avatar
Member
 
Join Date: Apr 2007
Location: Portland, ME
Posts: 560
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
lbdavis is on a distinguished road
Check to see if you let air into any hose between the seacock -> strainer -> pump. If so prime it all with pink stuff, cap the end of the hose, put it into your bucket of pink then uncap it.

It could be a crazy coincidence that your pump failed at this same time, but that seems unlikely.
Reply With Quote Share with Facebook
  #4  
Old 01-10-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Pamlico-

It sounds like you airlocked the raw water side of your cooling system. One thing I have for just such a situation is a four gallon plastic bladder with a hose fitting on it. This way you can fill the bladder with anti-freeze and mount it high enough that the antifreeze will flow down into the engine's raw water side and "prime" the raw water pump. They sell these at WM... which is where I got mine.

Be careful not to run it for very long since you can damage the raw water impeller. Globe supposedly makes some impellers that don't get as easily damaged by being run dry, but I've heard contradictory reports on their quality. Also, not having water in the raw water side is bad for the cooling system.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #5  
Old 01-10-2008
Senior Member
 
Join Date: Sep 2006
Posts: 2,179
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Rockter will become famous soon enough
Yes, it happens all the time. Prime the pump.
If I let the old ship dry out against the harbour wall, it will noit draw raw coolant again unless I disconnect the water feed to the pump, let it pee into the boat, then connect it again.

Once the pump is primed, it works for years again, until the ship is dried out again, anyway.

Rockter.
Reply With Quote Share with Facebook
  #6  
Old 01-10-2008
Pamlicotraveler's Avatar
Senior Member
 
Join Date: Aug 2006
Location: Creedmoor NC
Posts: 555
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 8
Pamlicotraveler is on a distinguished road
I love Sailnet. I went to bed and woke up with several right-on posts. Thanks guys. SD, I think I will go buy one of those things. Then after the job is done fold it up and use it as a spare water carrier for a trip.

Rockter..I didn't try intentionally draining the remaining water in the line either and should probably do that.

It just didn't sound likely that the raw water pump or impeller failed coincidentally at the moment I had this happen. Possible, but not likely.

My luck would never have the raw water pump fail at the dock. It would be more likely to happen at an inlet with a 2 knot tide flow,a rock jetty on each side, and the sailcover zipped up. (And my wife asking me if I turned the seacock back on)

Thanks again!
__________________
Twenty years from now you will be more disappointed by the things y%^&*.....oh never mind. 90% of the people on sailing forums already use that as their signature! I'm not a conformist.
Reply With Quote Share with Facebook
  #7  
Old 01-10-2008
JohnRPollard's Avatar
Moderator
 
Join Date: Mar 2007
Location: Chesapeake
Posts: 5,680
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 10
JohnRPollard is a jewel in the rough JohnRPollard is a jewel in the rough JohnRPollard is a jewel in the rough
Pamlico,

The same thing has happened to me more than once. I've always had good luck by just reconnecting the hose to the through-hull seacock, then opening the sea-**** and letting the water pressure slowly/gradually re-prime the line. Sometimes it takes a half-hour to an hour, during which time I move on to other boat chores. It's less pro-active than the other approaches described above, but it doesn't require any additional tools/equipment either. (We have a soft rubber impeller on our raw water pump, so I can't say this method would work in all cases).

Once you get the hose/pump re-primed, be careful as you remove it again that you do not let all the raw water dump out of it. Try to hold your thumb over the end of the hose as soon as you pop it off the sea-****, then immediately put it into your anti-freeze bucket (which you should get ready/handy before removing the hose). Good luck!
Reply With Quote Share with Facebook
  #8  
Old 01-10-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
I see you've met my friend Murphy.
Quote:
Originally Posted by Pamlicotraveler View Post
...My luck would never have the raw water pump fail at the dock. It would be more likely to happen at an inlet with a 2 knot tide flow,a rock jetty on each side, and the sailcover zipped up. (And my wife asking me if I turned the seacock back on)

Thanks again!
BTW, I'd really recommend you check the raw water impeller for damage. Just in case...
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #9  
Old 01-10-2008
chucklesR's Avatar
Senior Member
 
Join Date: Sep 2007
Location: Pasadena Md - Magothy side
Posts: 5,942
Thanks: 9
Thanked 29 Times in 29 Posts
Rep Power: 9
chucklesR is a jewel in the rough chucklesR is a jewel in the rough chucklesR is a jewel in the rough
If you run the pink stuff thru the strainer, and your strainer is clear you have a visual check on the air lock, the strainer should be full of pink stuff.

If not, follow John's method and just reconnect and let nature take over, when the strainer is again full of raw water re do the hose to the bucket, this time keeping the hose full of water or funnel in pink stuff), cap it an stick it in the bucket.

BTW - I have a 12v pump I use and flush my coolant system of raw water in theory every time I sail to cut down on corrosion. In practice it's not so often as I'd like. I use the same 5 gallons of pink stuff all summer long, then replace it when I winterize. It's easy for me as the WB 30 has nice easy to get to hose fittings (for draining) and so does the raw water sea ****. (to pump into).
Reply With Quote Share with Facebook
  #10  
Old 01-10-2008
Senior Member
 
Join Date: Jul 2001
Posts: 1,174
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 14
k1vsk will become famous soon enough
Raw water (impellor) pumps are self-priming. I'm sure others here have primed the system to get it to work, however, that indicates that either the pump is problemmatic or the impellor is damaged. These pumps should never require priming unless something else is wrong.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
What's your biggest bonehead move sailing? CharlieCobra Seamanship & Navigation 569 3 Weeks Ago 04:48 PM
Raw water cooling - removing scale Tomaz Gear & Maintenance 6 09-02-2007 01:16 PM
Oday 30 Raw water flow and folding props deniseO30 O'Day 2 08-13-2007 08:25 AM
Water Ballast/Manufacturer RSJ Boat Review and Purchase Forum 6 03-07-2002 05:59 PM
Raw Water in Engine wmwtlw Gear & Maintenance 3 02-25-2001 11:31 AM


All times are GMT -4. The time now is 01:40 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.