Raw water intake - 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? 


Like Tree1Likes
  • 1 Post By jrd22
Reply
 
LinkBack Thread Tools
  #1  
Old 12-11-2013
Senior Member
 
Join Date: Feb 2010
Location: SW FLORIDA
Posts: 126
Thanks: 3
Thanked 1 Time in 1 Post
Rep Power: 5
algee is on a distinguished road
Raw water intake

I am geting ready to replace my raw water strainer and all the hoses and fittings from the thru hull to the impeller pump. The engine is a Westerbeke 27A. I can't find anything in my parts and operators info that specs what size strainer and hoses to use.

The present "system" is a 5/8 ID reinforced garden hose from the seacock to the strainer, and a 7/8 ID hose from the strainer to the impeller pump.

I am thinking of going with a Groco ARG 3/4 strainer and 3/4 in hose. What does your boat have on it, and what would you suggest I use? Is 3/4 inch large enough for this engine?

Last edited by algee; 12-11-2013 at 04:23 PM.
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 12-11-2013
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 2,300
Thanks: 2
Thanked 45 Times in 45 Posts
Rep Power: 4
MarkSF is on a distinguished road
Re: Raw water intake

The hoses from seacock to strainer, and from strainer to raw water pump, have suction on them and hence can collapse if the intake gets a bit blocked. You need proper Trident reinforced hose, like this :

Trident Flex Marine Wet Exhaust Water Hose

Garden hose is not going to cut it.

I also use it for the rest of the raw water system.
__________________
1984 Bristol 31.1
Alameda, California, USA
Reply With Quote Quick reply to this message Share with Facebook
The Following User Says Thank You to MarkSF For This Useful Post:
fharbison (12-11-2013)
  #3  
Old 12-11-2013
jrd22's Avatar
Courtney the Dancer
 
Join Date: Nov 2000
Location: San Juan Islands., WA, USA
Posts: 3,844
Thanks: 3
Thanked 18 Times in 18 Posts
Rep Power: 15
jrd22 will become famous soon enough
Re: Raw water intake

All the hose from the through hull to the raw water pump should be the same size, or larger. What is the diameter of the through hull for the raw water supply? I'd contact Westerbeke and follow their instructions.
Faster likes this.
__________________
John
SV Laurie Anne

1988 Brewer 40 Pilothouse

Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 12-11-2013
Senior Member
 
Join Date: Oct 2009
Location: Pennsylvania
Posts: 682
Thanks: 8
Thanked 1 Time in 1 Post
Rep Power: 6
LinekinBayCD is on a distinguished road
Re: Raw water intake

Westerbeke's website has manuals and drawings for most all models present and discontinued. The drawings should indicate the inside diameter of the hose fittings on the engine. You should not go smaller. It would just make the impeller work harder to get the water through the cooling system.
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 12-13-2013
priscilla's Avatar
Member
 
Join Date: Mar 2000
Location: Marblehead, Ma.
Posts: 84
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 15
priscilla is on a distinguished road
Re: Raw water intake

Westerbeke's Installation Manual has all the data on hose sizes and material for their engines and generators and thats available on their website. However, at your suggestion ,we will now add it to our operator manuals. Of course the I.D. of the hose would need to fit the O.D. of the raw water pump nipple.
__________________
Priscilla
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 12-13-2013
Senior Member
 
Join Date: Feb 2010
Location: SW FLORIDA
Posts: 126
Thanks: 3
Thanked 1 Time in 1 Post
Rep Power: 5
algee is on a distinguished road
Re: Raw water intake

PlumBing has always been my least favorite DIY thing to do. If anyone has a douBt just look at the BBBBB. Here is the ruB--- when you start with a 3/4 threaded fitting and connect to a 3/4 hose the hose barb is reduced to 1/2. If you go to a full flow 3/4 fitting you have to go to a 1" hose !

Now Westerbeke specs a 7/8 hose into the impeller. OK fine---now try to find a thru hull, and a strainer to work with a 7/8 hose???

I am sure it could be done by using a bunch of reducers etc.etc.

Try to find 7/8 hose and fittings---good luck. Maybe I should have been an engineer so I could make things overly complicated.
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
Additional raw water intake to supplement saildrive intake. GMC Gear & Maintenance 1 02-18-2012 03:10 PM
What is this *thing* between my raw water intake and engine stantale Diesel 16 10-25-2011 11:04 PM
raw water intake strainer annascaptain P30 1 06-02-2011 12:30 PM
Necessary to shut off raw water intake? harpguitar Gear & Maintenance 9 08-09-2008 02:54 PM
raw water intake rchad Gear & Maintenance 12 06-26-2008 09:19 AM


All times are GMT -4. The time now is 10:59 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.