Raw water pump - Page 2 - 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? 
  #11  
Old 03-25-2007
Valiente's Avatar
Senior Member
 
Join Date: Jun 2006
Location: Toronto
Posts: 5,491
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
Valiente has a spectacular aura about Valiente has a spectacular aura about
You could carefully run a miniscule bead of high-heat gasketing around the top of the threads, or even the top of the zinc screw hole. If the zinc has several threads in direct contact with the metal, it should work. But if you goop over the seam, that may lessen the dripping and achieve your goal.
Reply With Quote Quick reply to this message Share with Facebook
  #12  
Old 03-26-2007
bestfriend's Avatar
Hitchin' a ride
 
Join Date: Sep 2006
Location: In my mind, I live in Oslo
Posts: 3,191
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
bestfriend is a jewel in the rough bestfriend is a jewel in the rough bestfriend is a jewel in the rough
The new pump is in and the new hoses are on. The engine started, and after about a minute, the system primed and I got water out the exhaust. Unfortunately it seems like I am getting less water out. The pump is working, and when I go to high idle, I get more water out. Temp stays where it normally does, no overheating. I have not cleaned out the heat exchanger yet. Strainer is empty. So, I am wondering if using hoses that are too small would cause less water. I kind of doubt it, though. I bought 1/2 inch to replace from the strainer on to the engine and the rest of the system. They were very tight going on, but the next size up, 5/8, slid right on, and that seemed too loose. The old hoses weren't marked. I don't think 1/8 inch would make a difference. Could it be that the old impeller was spinning more freely from wear, and sending more water?
I get a spurt about once every 45 seconds at idle, does that seem right?
Oh, and no tape on the zinc threads is holding the seal.
__________________
Great men always have too much sail up. - Christopher Buckley


Vaya con Dios
Reply With Quote Quick reply to this message Share with Facebook
  #13  
Old 03-26-2007
Senior Member
 
Join Date: Jan 2007
Location: New Jersey
Posts: 126
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
tonic is on a distinguished road
I know it's a new pump but check the impeller. As for the hoses if 5/8 was on before it should be going back on I would think. Ambient temperature I would guess could effect how a hose slids on a off? Measure the OD of the fitting?

Last edited by tonic; 03-26-2007 at 11:05 PM.
Reply With Quote Quick reply to this message Share with Facebook
  #14  
Old 03-26-2007
bestfriend's Avatar
Hitchin' a ride
 
Join Date: Sep 2006
Location: In my mind, I live in Oslo
Posts: 3,191
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
bestfriend is a jewel in the rough bestfriend is a jewel in the rough bestfriend is a jewel in the rough
The previous hoses didn't have a size on them and they did not match up with the Trident hoses that I bought. Either too big or too small. I didn't measure the nipple, unfortunately. I may have to go back and do that. I will have to keep an eye on the temp and use that as my indicator that everything is ok.
__________________
Great men always have too much sail up. - Christopher Buckley


Vaya con Dios
Reply With Quote Quick reply to this message Share with Facebook
  #15  
Old 03-26-2007
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 11 Times in 11 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
Bestfriend-

The hoses are supposed to be very tight going on... but they should fit over the fitting without needing to be cut, but should need to be forced. If they don't need to be forced, then the hose is too big.
__________________
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 Quick reply to this message Share with Facebook
  #16  
Old 03-27-2007
bestfriend's Avatar
Hitchin' a ride
 
Join Date: Sep 2006
Location: In my mind, I live in Oslo
Posts: 3,191
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
bestfriend is a jewel in the rough bestfriend is a jewel in the rough bestfriend is a jewel in the rough
something must be up with the moon

Heres the latest. I started the boat up today and got no water out the exhaust. Two days ago I was getting what I thought was not enough, but I was getting some. So, first I took the hose off the seacock and made sure it was open and flowing, it was. Next, checked the strainer, no blockage, but the water did not taste very salty(I had filled the strainer with fresh water to help prime). I deduced that the pump was not working. So, next I disconnected the pump discharge hose and fired up the engine. No water coming out, not even a breeze coming out the hose. I took the pump off and guess what, a whole bunch of tiny rubber pieces came out. Then I looked in the elbows and saw that even bigger pieces were blocking the passage. So, somehow the impeller shattered. Back to the store.
__________________
Great men always have too much sail up. - Christopher Buckley


Vaya con Dios
Reply With Quote Quick reply to this message Share with Facebook
  #17  
Old 03-27-2007
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 15,338
Thanks: 88
Thanked 242 Times in 233 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
BF - was it a new pump or just an impeller change? Either way, maybe you got stuck with an impeller that had long outlived its shelf life.

Did you have the pump apart before/during installation and notice the condition of the impeller at that time?

These impellers are usually pretty tough - it would be rare for a good one to fail so soon. This one sounds like it self destructed soon after startup.

Real important, obviously, to get all the "bits" out of the HE system.....
Reply With Quote Quick reply to this message Share with Facebook
  #18  
Old 03-27-2007
bestfriend's Avatar
Hitchin' a ride
 
Join Date: Sep 2006
Location: In my mind, I live in Oslo
Posts: 3,191
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
bestfriend is a jewel in the rough bestfriend is a jewel in the rough bestfriend is a jewel in the rough
Faster - It was a new pump, and I did not take it apart. I haven't cleaned out the exchanger yet, that was my next project, so that worked out ok. I had read on another board that it didn't matter which way the impeller was put in because it was rubber and would flip the right way. I find that very hard to believe looking at the innards of my old one. The tolerance seems much too tight. I think this one was put together wrong.
__________________
Great men always have too much sail up. - Christopher Buckley


Vaya con Dios
Reply With Quote Quick reply to this message Share with Facebook
  #19  
Old 03-27-2007
JouvertSpirit's Avatar
Member
 
Join Date: Oct 2006
Location: Panama City Beach, Florida
Posts: 86
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
JouvertSpirit is on a distinguished road
Use conductive Teflon tape. Simple.
__________________
Pearson 10M.
Reply With Quote Quick reply to this message Share with Facebook
  #20  
Old 03-27-2007
bestfriend's Avatar
Hitchin' a ride
 
Join Date: Sep 2006
Location: In my mind, I live in Oslo
Posts: 3,191
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
bestfriend is a jewel in the rough bestfriend is a jewel in the rough bestfriend is a jewel in the rough
Oooo. Learn something new everyday!

Well, wrong again. I took the elbows off and turned the shaft and it does rotate easily both ways. Looking into the holes I can see that only one of the blades is torn off.
__________________
Great men always have too much sail up. - Christopher Buckley


Vaya con Dios

Last edited by bestfriend; 03-27-2007 at 11:11 PM.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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
Devising a Better Bilge Pump Don Casey Seamanship Articles 0 06-02-2002 09:00 PM
Devising a Better Bilge Pump Don Casey Gear and Maintenance Articles 0 06-02-2002 09:00 PM
Devising a Better Bilge Pump Don Casey Cruising Articles 0 06-02-2002 09:00 PM


All times are GMT -4. The time now is 05:30 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.