Go Back  Offshoreonly.com > Owners Forum > Formula
Draft on F311 SR-1 >

Draft on F311 SR-1

Notices
Formula

Draft on F311 SR-1

Thread Tools
 
Old 05-05-2022 | 08:21 PM
  #1  
Thread Starter
Registered
5 Year Member
 
Joined: Mar 2019
Posts: 1,022
Likes: 321
From: Perdido Key, Madison, NC
Default Draft on F311 SR-1

I will go out and measure BUT I was wondering if the draft (as stated in the brochure, see below) is to the bottom of the keel or the bottom of the Bravo drives?

F14A water jet is offline  
Reply
Old 05-05-2022 | 09:44 PM
  #2  
Registered
5 Year Member
 
Joined: Nov 2020
Posts: 131
Likes: 160
From: Grand Haven MI
Default

My understanding is that it is to the bottom of the hull (keel).....the minimum depth of water to float the boat. I think if it would say “draft up” or “draft down”, that would include drive.
Noles1 is offline  
Reply
Old 05-06-2022 | 09:30 AM
  #3  
Thread Starter
Registered
5 Year Member
 
Joined: Mar 2019
Posts: 1,022
Likes: 321
From: Perdido Key, Madison, NC
Default

Originally Posted by Noles1
My understanding is that it is to the bottom of the hull (keel).....the minimum depth of water to float the boat. I think if it would say “draft up” or “draft down”, that would include drive.
Roger that...I will measure and report back (with fuel load, etc...).
F14A water jet is offline  
Reply
Old 05-06-2022 | 12:49 PM
  #4  
Registered
5 Year Member
 
Joined: Sep 2020
Posts: 55
Likes: 40
From: Rhode Island
Default

On my F-302 with TRS it was waterline to bottom of skeg, 3'-2" (38") was the spec. i measured as we had a low water issue at a mooring and it was pretty much spot on the 38"
SammyJ is offline  
Reply
Old 05-06-2022 | 01:23 PM
  #5  
Registered
5 Year Member
 
Joined: Nov 2020
Posts: 131
Likes: 160
From: Grand Haven MI
Default

You got me thinking so I just went and measured mine in back garage. I looked at pics of boat at where the water line was and measured to the keel, it was about 24”. I then measured with the drive down all the way and it was about 40” to the very bottom of skeg. The brochure says my boat has a 32” draft……definitely closer to the drive being down than the keel. I do have a 2000 bravo one not the 89’ that came with it…..not sure if they made the newer ones taller.

I think my understanding of it (measurement of draft) was wrong and Sammyj is correct…..to skeg not keel. If my boat itself is drawing 32” of water, I should be calling coast guard!


Noles1 is offline  
Reply
Old 05-06-2022 | 01:59 PM
  #6  
Registered
10 Year Member
 
Joined: Oct 2012
Posts: 2,230
Likes: 536
Default

I believe it is too bottom of skeg.

If you look at you boat, how deep is the hull? Is it even 34"to the rub rail?
underpsi68 is offline  
Reply
Old 05-06-2022 | 02:58 PM
  #7  
Registered
5 Year Member
 
Joined: Nov 2020
Posts: 131
Likes: 160
From: Grand Haven MI
Default

Originally Posted by underpsi68
I believe it is too bottom of skeg.

If you look at you boat, how deep is the hull? Is it even 34"to the rub rail?
I did measure that earlier as well, mine was 45” from rub rail to keel at transom.

The old formulas are deep.
Noles1 is offline  
Reply
Old 05-06-2022 | 07:35 PM
  #8  
Thread Starter
Registered
5 Year Member
 
Joined: Mar 2019
Posts: 1,022
Likes: 321
From: Perdido Key, Madison, NC
Default

So, my 311 with 3/4 fuel floats with the waterline about 1" below the black paint on the back part of the boat. That black line is 26" above the keel. The skeg of the Bravo drives extends ~8" below the keel (drive full down), therefore a draft of 34" would be waterline (bottom of black paint at full fuel probably) to bottom of skeg...at least by my calculations.
F14A water jet is offline  
Reply

Posting Rules
You may not post new threads
You may not 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.