Raw water pump - Page 3 - 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? 
  #21  
Old 03-27-2007
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
Impellers can get pretty brittle if they're run dry or get too old. Globe makes some that are designed to resist burning out if run dry. Once the impeller gets brittle, the blades break off and get stuck in the cooling system... which is very bad.
__________________
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
  #22  
Old 03-27-2007
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 15,328
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
Quote:
Originally Posted by bestfriend
... 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 ..
Actually it's true - the impeller will flip itself around if installed backwards, but I usually try to get it in in the correct orientation "just because"..

When you buy a replacement (which obviously you'll have to do) it should come with a small capsule of silicone lube to put on the impeller to help it seat itself and prevent damage during the initial "dry" run til it primes itself.

Luckily you don't have to find a large number of bits... I'm actually surprised it quit pumping altogether with only one impeller blade missing..... maybe there's more to this yet?
Reply With Quote Quick reply to this message Share with Facebook
  #23  
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
What really irks me, besides the extra work, is that I emailed sherwood and asked them if I needed to lube anything before install. They said no.
Oh and I won't be "buying" a replacement. No way. This ones on them.
I think the blade that broke was blocking any flow of water. The pump was probably still running.
__________________
Great men always have too much sail up. - Christopher Buckley


Vaya con Dios

Last edited by bestfriend; 03-27-2007 at 11:32 PM.
Reply With Quote Quick reply to this message Share with Facebook
  #24  
Old 03-27-2007
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 15,328
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
The impeller may have been "prelubed" by Sherwood I suppose, but if it was on the shelf forever the advantage would be lost anyway.

If the blade that broke off is big enough to block flow, then your might get lucky and there won't be a whole lot of other debris to pick out!

Best of luck. (and get 2 impellers.... now!)
Reply With Quote Quick reply to this message Share with Facebook
  #25  
Old 03-28-2007
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
Good luck with the impeller hope it solves everything. No flow seems stange as Faster mentioned. Persistance. Bring some good tunes.
Reply With Quote Quick reply to this message Share with Facebook
  #26  
Old 03-28-2007
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
I have been in contact with sherwood and they told me to go through the warranty process at the marine store. So, I have to send it back and wait. Meanwhile, I will put the old pump back on. It still works, but the seals are starting to leak. They had suggested that I put it on wrong, but there is no way. It only fits one way. If its installed 180 degrees wrong, the block and throttle assembly is in the way of the hoses. If I switched the hoses, it would be painfully obvious. The discharge hose is only long enough to make it to the closest nipple. But, along with persistence, I will have to have patience and jump through their hoops.
__________________
Great men always have too much sail up. - Christopher Buckley


Vaya con Dios
Reply With Quote Quick reply to this message Share with Facebook
  #27  
Old 03-29-2007
pigslo's Avatar
Senior Member
 
Join Date: Nov 2004
Posts: 804
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
pigslo is on a distinguished road
I put a new impellor in recently and had a hell of a time getting it to prime until I swabed mineral oil on with a q-tip.
pigslo
Reply With Quote Quick reply to this message Share with Facebook
  #28  
Old 03-29-2007
KeelHaulin's Avatar
STARBOARD!!
 
Join Date: Mar 2006
Posts: 1,662
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 10
KeelHaulin will become famous soon enough KeelHaulin will become famous soon enough
Quote:
Originally Posted by bestfriend
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.
You are correct; the impeller MUST be in the correct orientation otherwise they will either break or they will remain stuck pointing the wrong direction and wear out quickly. It is possible that the pump you bought was assembled for an engine that rotates in the opposite direction to yours; so the drive shaft for the water pump would be turning the opposite direction. It's important to check your old unit and verify the impeller rotation direction before replacing it with the new unit. Good thing you double checked for water flow before setting out to sail!
Reply With Quote Quick reply to this message Share with Facebook
  #29  
Old 03-29-2007
pigslo's Avatar
Senior Member
 
Join Date: Nov 2004
Posts: 804
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
pigslo is on a distinguished road
It matters not how you compress the vanes, they will right themselves after one rotation.
pigslo
Reply With Quote Quick reply to this message Share with Facebook
  #30  
Old 03-29-2007
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 15,328
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
Quote:
Originally Posted by pigslo
It matters not how you compress the vanes, they will right themselves after one rotation.
pigslo
True... and a GOOD impeller should not break on the first twist, regardless. If it does, then it was dried out and ready to fail anyway.

Lubing with the provided capsule aids this, aids priming and protects the impeller when it runs dry for a few seconds.
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 04:11 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.