Davis Bahia Outboard Conversion

oceanski

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Oct 6, 2015
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Taylor O
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2003 Davis Bahia
Spent the weekend grinding the transom to get it ready for reinforcement.
 

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oceanski

I Should Upgrade My Account
Oct 6, 2015
1,103
991
Valley Center
Name
Taylor O
Boat
2003 Davis Bahia
I am reinforcing the transom with 1” thick Coosa Board Bluewater 26 instead of plywood. Coosa wasn’t cheap but I think it’s the right call since it won’t rot. With the left over scraps I made plugs for the 2 old bait tank exits and the I/O hole. I am trying to attach more pics but BD is saying most of my pics are too large for the server. Odd.
 

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a7ewizard

Almost A Member
Jun 4, 2009
145
138
SAN RAFAEL,CA USA
Name
WARREN WEISENBURG
Boat
251,PRO-LINE, WIZARD
Good progress!

That grinding inside the hull is a miserable job! The dust gets every where no matter how you try to clean as you go or tarp off areas.

Use a 4 to 6 inch short nap roller for resin and gel coat. Much faster and better finish (gel coat) than with a brush. Multiple layers as gel coat sags and clumps if too much applied all at once. Test the roller for comparability with polyester products.

Smooth out the surface as best you can and fill gouged spots. The fabric and resin won't fill bad spots. The resin will run out and the fabric may not conform leaving a delaminated spot. This will require spot grinding and repairs.

I used Coosa to recore my hard top. It worked great. My recommendations are to use an air compressor to blow the dust out of the pores as best you can. Next, wipe down the surface with acetone. Apply pure resin to the surface of the transom piece while it is horizontal to let it seep in and prep the surface. Once cured and tacky (laminating resin) then make your putty and join the Coosa to the existing transom.

Are you thinking of wedging the Coosa or bolting/screwing it to the transom while it sets up?
 
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oceanski

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Oct 6, 2015
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991
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Taylor O
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2003 Davis Bahia
Coosa board is cut to fit perfectly. Adding 2 shelves to the transom that will help with reinforcement but also be handy for storing things. Hopefully glass in two weekends then the bracket should be here in early March. Slowly moving along with the free time I have.
 

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oceanski

I Should Upgrade My Account
Oct 6, 2015
1,103
991
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Name
Taylor O
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2003 Davis Bahia
Good progress!

That grinding inside the hull is a miserable job! The dust gets every where no matter how you try to clean as you go or tarp off areas.

Use a 4 to 6 inch short nap roller for resin and gel coat. Much faster and better finish (gel coat) than with a brush. Multiple layers as gel coat sags and clumps if too much applied all at once. Test the roller for comparability with polyester products.

Smooth out the surface as best you can and fill gouged spots. The fabric and resin won't fill bad spots. The resin will run out and the fabric may not conform leaving a delaminated spot. This will require spot grinding and repairs.

I used Coosa to recore my hard top. It worked great. My recommendations are to use an air compressor to blow the dust out of the pores as best you can. Next, wipe down the surface with acetone. Apply pure resin to the surface of the transom piece while it is horizontal to let it seep in and prep the surface. Once cured and tacky (laminating resin) then make your putty and join the Coosa to the existing transom.

Are you thinking of wedging the Coosa or bolting/screwing it to the transom while it sets up?
Thanks for the recommendations! I have 12 holes from the swimstep that I will use to bolt down. Also wedge cut pieces of wood in there.
 
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Dragon

It is what it is...
May 24, 2006
407
284
SLO Co.
Name
Paul
Boat
22' Pro Sport CC / 20' Skipjack Open
You may want to do the shelves after the bracket install? and put a nose on the front of the shelves so stuff doesn't slide off? Going to be Bad Ass, your going to love the clear deck and the Outboard Power.
 
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oceanski

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Oct 6, 2015
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Taylor O
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2003 Davis Bahia
Yes, the shelves will be added after bracket installation.
I am planning to add lips on each side of the shelves so things can’t slide off and also helps funnel water to the bilge in case any water gets in somehow. That way water can’t sit under the transom bait tanks.
 
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a7ewizard

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Jun 4, 2009
145
138
SAN RAFAEL,CA USA
Name
WARREN WEISENBURG
Boat
251,PRO-LINE, WIZARD
I was looking more closely at your engine opening; does that gutter run around all 3 sides? Do you plan to build a cover that is flush with the rest of the deck?

Mine is 1.5 inches higher than the deck. Building in a gutter and drain was taking on more work that I wasn't in the mood for.
20170923_104654.jpg
20170905_092630.jpg
 
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oceanski

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Oct 6, 2015
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Taylor O
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2003 Davis Bahia
I will be adding a hatch that is flush to the deck so it’s not a tripping hazard.

today I did quite a bit of glass work. Tomorrow I will glass over the coosa board.

big project but fun project.
 

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oceanski

I Should Upgrade My Account
Oct 6, 2015
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991
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Taylor O
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2003 Davis Bahia
Just got word from Armstrong that the bracket will ship from Florida tomorrow. Will hopefully have the transom fully prepped by next weekend.

The transom is now 3” thick after reinforcing with Coosa and glass. Opted for the 4.5” (biggest) mounting bolts from Armstrong.
 
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oceanski

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Oct 6, 2015
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Taylor O
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2003 Davis Bahia
One step closer to having the transom prepped.

I was going to use starboard to cover the old gauge holes but decided to glass in. I will flush mount the autopilot gauge and Suzuki gauge.

thought about buying another mfd but not sure where I’d put it. the 12” over my head gets a little tough to constantly look up at.
 

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oceanski

I Should Upgrade My Account
Oct 6, 2015
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Taylor O
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2003 Davis Bahia
Decided to buy a Simrad GO7 for the dash. Would’ve like to put an Evo7 but not enough space and don’t have the extra time to devote to another big glass project.
 
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a7ewizard

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Jun 4, 2009
145
138
SAN RAFAEL,CA USA
Name
WARREN WEISENBURG
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251,PRO-LINE, WIZARD
I recently watched a YouTube video on mounting a bracket. Good stuff about finding the transom vertical center line and transom angle and adjustments. Yes, the forklift made it much easier!
Search "born again boating". Pretty sure that's where I saw it.
 
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oceanski

I Should Upgrade My Account
Oct 6, 2015
1,103
991
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Name
Taylor O
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2003 Davis Bahia
I recently watched a YouTube video on mounting a bracket. Good stuff about finding the transom vertical center line and transom angle and adjustments. Yes, the forklift made it much easier!
Search "born again boating". Pretty sure that's where I saw it.
Thanks for the recommendation! I will watch it.
 
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Ranger805

Newbie
Aug 30, 2016
55
10
Ventura CA
Name
John
Boat
Radoncraft
I am adding a pilothouse to my Cortez 22 and made some changes at the helm to add a 7” MFD. I agree looking up at the overhead electronics gets old. I will be moving the electronics locker 10” forward.
 

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sfjakey

Member
Jun 3, 2009
291
139
Novato, Ca
Name
Bob Postel
Boat
Davis Rock Harbor Short Cabin "Full Box"
I wish I had the balls and the ability to tear apart my davis and make changes I want. You guys are amazing
 
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a7ewizard

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Jun 4, 2009
145
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SAN RAFAEL,CA USA
Name
WARREN WEISENBURG
Boat
251,PRO-LINE, WIZARD
No forklift?!
That video used 4200 I think. I used 2 caulk gun tubes of 5200. If I ever need to remove it.....

I hope you have someone to help you with the permenant mounting.
A couple extra nuts and bolts in case the aluminum boogers the threads.
 
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oceanski

I Should Upgrade My Account
Oct 6, 2015
1,103
991
Valley Center
Name
Taylor O
Boat
2003 Davis Bahia
No forklift?!
That video used 4200 I think. I used 2 caulk gun tubes of 5200. If I ever need to remove it.....

I hope you have someone to help you with the permenant mounting.
A couple extra nuts and bolts in case the aluminum boogers the threads.
Tractor was used since I don’t have access to a forklift. My grandfather will be helping me as it’s definitely a 2 person job.

I’m heading down to West Marine tomorrow for some more parts... plenty of 5200 is on the list!

drilled a total of 34 holes today.
 

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Carpfisher

Chief Cook & Bottle Washer
Jul 3, 2012
835
341
Carpinteria
Name
Paul
Boat
226 Cabo Cuddycon, 16' Bayrunner
Put mine on last weekend. No swim step so only 16 holes. Forklift and 2 tubes of 5200. Splashing today to see where she rides in the water. I went with 4" up. Bless Lawrences heart for putting up with my 1,000 questions. Look forward to seeing how yours rides.
 
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