Tips for cutting hole for flush mount through-hull - Page 2 - SailNet Community
 3Likes
Reply
 
LinkBack Thread Tools
post #11 of 29 Old 04-15-2013
Senior Moment Member
 
SloopJonB's Avatar
 
Join Date: Jun 2011
Location: West Vancouver B.C.
Posts: 12,699
Thanks: 81
Thanked 100 Times in 96 Posts
Rep Power: 5
 
Re: Tips for cutting hole for flush mount through-hull

I've never had a sink drain corrode away on me so they'll last a long time. If they do start to corrode, just replace them for a couple of bucks every 10 years or so.

In my experience, most of the boats out there use sink drains for that application.

I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
SloopJonB is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of 29 Old 04-15-2013 Thread Starter
Unpaid Intern
 
josrulz's Avatar
 
Join Date: Oct 2006
Location: Maryland
Posts: 992
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 10
 
Re: Tips for cutting hole for flush mount through-hull

Well, I hear your point, and you would probably be right for a lot of boat. You're right the drain is fine on our boat and it's 29 years old. It looks great. But all the hardware holding the drain to the boat and the hose to the drain turned to dust. It was an accident waiting to happen. That said, if they could easily be replaced every 10 years, maybe I'd just do that. But in our configuration it's not only difficult, I'm not actually sure it's possible. The parts break just trying to get the hose on. Not very secure...

The problem is you have to side-load the heck out of the drain tailpiece to get the hose on. A real cockpit drain would not need to be fully mounted before putting the hose on, so I could get the hose on everything, then bed the drain. Not possible with a sink drain. The search continues...

1984 Sabre 34 Mk I
josrulz is offline  
Quote Quick Reply Share with Facebook
post #13 of 29 Old 04-15-2013
Tundra Down
 
downeast450's Avatar
 
Join Date: Jan 2008
Location: Seal Harbor, Maine
Posts: 1,286
Thanks: 51
Thanked 21 Times in 20 Posts
Rep Power: 9
 
Re: Tips for cutting hole for flush mount through-hull

josrulz

I added one with a similar lateral clearance problem. I drilled the center hole. To form the bevel, I marked the outside radius of the drain flange. Using a hacksaw blade I made several angled cuts from the outside radius mark to the center hole and "carved" the material between the cuts away with wood chisels (gouges). It didn't take that long. I worked slowly and carefully doing the carving. I dry fit it as i worked. A wood rasp finished the hole. It wasn't perfect but after the 5200 I used to set it cured, it is flush and I am the only one who can see the slight imperfection.

Down
downeast450 is offline  
Quote Quick Reply Share with Facebook
post #14 of 29 Old 04-15-2013
░░░░░░░░░░
 
Join Date: Apr 2006
Posts: 12,071
Thanks: 6
Thanked 160 Times in 157 Posts
Rep Power: 12
   
Re: Tips for cutting hole for flush mount through-hull

If the drains are within the range of conventional drill bits, or what do you call them, the "flat" drill bits, not helical ones?

It should be a cheap job to have a machine shop grind down a bit, or a piece of flat stock, to match the contour you need to flush set those drains.

Or, you could drill a hole of the right diameter, and simply use a good epoxy to fill underneath and match up the contour.

Probably worth a stop at a local machine shop to ask them what they can do for you.
hellosailor is offline  
Quote Quick Reply Share with Facebook
post #15 of 29 Old 04-15-2013
Senior Member
 
chef2sail's Avatar
 
Join Date: Nov 2007
Location: Maryland
Posts: 7,328
Thanks: 32
Thanked 75 Times in 71 Posts
Rep Power: 9
 
Send a message via AIM to chef2sail
Re: Tips for cutting hole for flush mount through-hull

Check out Buck Algonquin

Buck Algonquin COCKPIT SCUPPER 4 3/8 inch COMP.-00CPS438 - Discount Yacht Supplies, Vetus Nautical Accessories, Scandvik Parts, Garmin Marine Electronics
http://www.discountmarinesupplies.co..._Scuppers.html
Dave


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
___________________________
S/V Haleakala (Hawaiian for" House of the Sun")
C&C 35 MKIII Hull # 76
Parkville, Maryland
(photos by Joe McCary)
Charter member of the Chesapeake Lion posse

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


“Sailing is just the bottom line, like adding up the score in bridge. My real interest is in the tremendous game of life.”- Dennis Conner
chef2sail is offline  
Quote Quick Reply Share with Facebook
post #16 of 29 Old 04-16-2013 Thread Starter
Unpaid Intern
 
josrulz's Avatar
 
Join Date: Oct 2006
Location: Maryland
Posts: 992
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 10
 
Re: Tips for cutting hole for flush mount through-hull

Quote:
Originally Posted by hellosailor View Post
It should be a cheap job to have a machine shop grind down a bit, or a piece of flat stock, to match the contour you need to flush set those drains.
Hey that's not a bad idea. Thanks!

1984 Sabre 34 Mk I
josrulz is offline  
Quote Quick Reply Share with Facebook
post #17 of 29 Old 04-16-2013 Thread Starter
Unpaid Intern
 
josrulz's Avatar
 
Join Date: Oct 2006
Location: Maryland
Posts: 992
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 10
 
Re: Tips for cutting hole for flush mount through-hull

Quote:
Originally Posted by chef2sail View Post
Check out Buck Algonquin
Thanks chef2sail, I hadn't looked there before. Some additional options I hadn't seen, though nothing "perfect". I'll just have to decide which compromise I'm going to go with and bite the bullet.

Thanks again!
-J

1984 Sabre 34 Mk I
josrulz is offline  
Quote Quick Reply Share with Facebook
post #18 of 29 Old 04-16-2013
Just another Moderator
 
Faster's Avatar
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 18,102
Thanks: 125
Thanked 447 Times in 424 Posts
Rep Power: 10
     
Re: Tips for cutting hole for flush mount through-hull

Quote:
Originally Posted by hellosailor View Post
It should be a cheap job to have a machine shop grind down a bit, or a piece of flat stock, to match the contour you need to flush set those drains.

Probably worth a stop at a local machine shop to ask them what they can do for you.
You might even take those 'through hulls' you have and have THEM machined into a thinner lip flange that won't trap so much water around the recess.

(not clear if that's what HS was intending...)

Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Faster is offline  
Quote Quick Reply Share with Facebook
post #19 of 29 Old 04-16-2013
Senior Member
 
tommays's Avatar
 
Join Date: Sep 2008
Posts: 4,304
Thanks: 1
Thanked 32 Times in 32 Posts
Rep Power: 8
 
Re: Tips for cutting hole for flush mount through-hull

I was lucky in that all my OLD flush mount bronze was in good shape when I replaced the seacocks as I have the older LARGE flange that seems to only match current Marlon ones

On the Cal 29 there is a lot of EXTRA glass work form the factory at each flush through hole



I thought for sure who would make flush mount fittings and NOT sell a form cutting tool well I sure cant find a stock one



After reading the installation instructions it would seem the advise is to drill a hole and hack out a bevel which astounds me along with warnings that many modern cored and solid hulls are to thin for flush units
Faster likes this.

1970 Cal 29 Sea Fever

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

1981 J24 Tangent 2930
Tommays
Northport NY


If a dirty bottom slows you down what do you think it does to your boat
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
tommays is offline  
Quote Quick Reply Share with Facebook
post #20 of 29 Old 04-16-2013
Senior Member
 
Join Date: Jul 2006
Location: Corpus Christi, Tx
Posts: 1,366
Thanks: 36
Thanked 43 Times in 42 Posts
Rep Power: 10
 
Re: Tips for cutting hole for flush mount through-hull

Quote:
Originally Posted by downeast450 View Post
josrulz

I added one with a similar lateral clearance problem. I drilled the center hole. To form the bevel, I marked the outside radius of the drain flange. Using a hacksaw blade I made several angled cuts from the outside radius mark to the center hole and "carved" the material between the cuts away with wood chisels (gouges). It didn't take that long. I worked slowly and carefully doing the carving. I dry fit it as i worked. A wood rasp finished the hole. It wasn't perfect but after the 5200 I used to set it cured, it is flush and I am the only one who can see the slight imperfection.

Down
Did you happen to take photos to document your process? I guess you used one of those pistol grip hack saws, is that right? I'm faced with this problem right now.
Thanks
ccriders is offline  
Quote Quick Reply 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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
flush mount And removable? xymotic Electronics 3 12-09-2012 05:03 PM
flush mount bolts? johnnyandjebus Gear & Maintenance 4 04-22-2010 10:22 AM
Garmin Flush Mount kit concerns DropTop Gear & Maintenance 12 07-16-2009 01:55 AM
Cutting a hole in the deck dawnhoff Gear & Maintenance 12 07-04-2008 09:47 AM
Cutting through hole NautiG Gear & Maintenance 12 01-08-2008 07:18 AM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome