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Copying a 31 Bertram in Quepos Costa Rica

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Copying a 31 Bertram in Quepos Costa Rica

Old 02-14-2018, 07:27 PM
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Originally Posted by SailFishQuepos View Post
Looks like It's getting serious, we started clearing the space to set the mold up. When i get something to take a picture of we'll get the Iphone snapping.

Great picture, is that to scale? I'm going to print that out, that looks like exactly what I'm looking for!

Am I seeing that correctly that there are two struts?
I pulled the photo from the user manual database on the Bertram website. I don't know if it's exactly to scale. After all it appears hand drawn.
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Old 02-15-2018, 05:17 PM
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nice boat ------grew up in Mantoloking NJ
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Old 03-14-2018, 10:05 AM
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Ok, well I guess we are starting. Been one thing after another and I had to keep putting this off. I think I already wrote about all the new gear they made us buy, and then after that they passed a new law where they have a special tax for charter boats. And we owe last year too! Welcome to Costa Rica. But now, finally seeing the light, I guess we'll start putting together a boat! The good thing is, the owner of the 40 mold was also hit pretty hard by all the new laws, so he didn't destroy the mold to make a commercial boat yet. So I don't think I'm going to finish the 40 footer first, but I am going to make the 40 foot hull first.

Here is how the hull started. It's been outside in the yard for about 15 years now:

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We moved it under the shade, at least half of it. Wow, this thing is heavy and I have never worked on something so big. This will be fun

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So to start we made some holes in the ground


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And then we are going to put whatever we can find in them to support the mold

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Found a bunch of scrap metal at the yard next door. I have been collecting beams for a year now from the recycling place. They have some big stuff. I never really had a plan for why I was collecting them, but I guess it all came together. Harold is happy to be building another boat. And he's good at carrying big heavy beams, there are two guys on the other end

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And then here is the 31 bert mold. I'll probably finish the 31 first.

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The goal right now is I just want to save enough money to buy the glass to make the hull and sides. I figure it'll take us a month to get this thing setup and ready to do. It is a 38 now, the old widebody 38 bertram they made 30 years back that had the ugly cabin on them. This one will be cooler. Somebody cut the last foot off of the mold, and I'm going to add two more feet so I have a 40. So we're gonna set it up and add 3 feet and see what it looks like ???

Kind of funny, I always thought my first 40 would be wood. But this boat, back when it was in Quepos, was the best boat by far at raising boat. The owner was super cheap, and they only had two white, because the sun faded them out, moldcraft lures. And even with crap gear, it was the boat to beat. I don't know what happened to the boat, the owner didn't take care of the motors at all, and then he abandoned it into the marina. And the marina sold it off, and now it's gone, haven't seen it since. So Quepos needs another one! But this one will be lighter, faster, and catch more fish! I'll post more pictures when I have em!
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Old 03-14-2018, 10:15 AM
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Glad to see you are starting again. The 38 mold looks a little warped. Are you going to be able to bring it back together without and hooks in the mold?
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Old 03-14-2018, 10:25 AM
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John: I'll send you a few bucks to help this along! Totally worth it for the entertainment value! PM me with your paypal email!
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Old 03-14-2018, 10:32 AM
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Originally Posted by jtcwhaler View Post
John: I'll send you a few bucks to help this along! Totally worth it for the entertainment value! PM me with your paypal email!
you gotta love this place. what a kind and generous gesture!
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Old 03-14-2018, 10:36 AM
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Or John could sneak up to Maverick and see what is laying around.
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Old 03-14-2018, 10:42 AM
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John - We will be down there the 17th - 24th and fishing 2 days with you. Are these molds at the marina where the boat leaves or elsewhere?
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Old 03-14-2018, 10:49 AM
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Molds are somewhere else, but let me know and I can send you directions if you want to see them.

My email address is FishCRJohN@Gmail.com but nobody is obligated to send over money. I do appreciate the offer though, and we will move forward as quickly as possible on these things!

The mold is super warped, and rotten and just bad. It's going to be a lot of work setting it up, but we will get right. We are going to just take our time and move slow until it looks good. But yes, it has a LLLOOOONNNNGGGG way to go!
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Old 03-14-2018, 10:53 AM
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What are you thinking for powering the 40? 6CTAs?
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Old 03-14-2018, 11:57 AM
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Originally Posted by Argon View Post
What are you thinking for powering the 40? 6CTAs?
Yes sir. Twin 450's with ZF 280A's. Gonna start with 22X24 4 blades and tune from there. I'm copying the motor setup from a glass boat in Los Suenos called the Good Day 2.
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Old 03-14-2018, 12:22 PM
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What size shafts are you going to use? I have a set of 24x22 laying in the garage for 1.75 inch shafts.
They are yours if we can figure a way to get them to you. I used 1.75 on my 6CTA but went with S&S propellers during the repower. Very smooth and faster than the Michigan Wheels.
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Old 03-14-2018, 12:27 PM
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Capt. John, love your threads on the boat builds.
I drive by this little marine sales place in Pinellas Park (St. Petersburg, Fl) on a weekly basis and they have what looks like a Bertam Moppy hull sitting in the parking lot. It's been there for several years and looks like it's never been touched since it came out of the mold.

If you are interested I could stop by and gather some info and more pictures. This hull is right up your alley and it's ready for your finishing touch!

Keep up the good posting. Very interesting!

PARKSIDE MARINE , PINELLAS PARK FL | Florida-Fictitious-Names.com
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Old 03-14-2018, 04:58 PM
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Originally Posted by SailFishQuepos View Post
My email address is FishCRJohN@Gmail.com but nobody is obligated to send over money. I do appreciate the offer though, and we will move forward as quickly as possible on these things!
My pleasure. And thanks for hooking me up with the charter up at Papagayo. Ended up booking with Rick of Dream On (in a week). Hoping the wind calms down.
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Old 03-14-2018, 06:23 PM
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Originally Posted by SailFishQuepos View Post
Yes sir. Twin 450's with ZF 280A's. Gonna start with 22X24 4 blades and tune from there. I'm copying the motor setup from a glass boat in Los Suenos called the Good Day 2.
What speed/rpms are you expecting at cruise and top end?
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Old 03-14-2018, 07:17 PM
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Originally Posted by Hillsboro View Post
What size shafts are you going to use? I have a set of 24x22 laying in the garage for 1.75 inch shafts.
They are yours if we can figure a way to get them to you. I used 1.75 on my 6CTA but went with S&S propellers during the repower. Very smooth and faster than the Michigan Wheels.
Wow, I was planning on 1.75 inch shafts. Let's negotiate, i would love to use your propellers!
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Old 03-14-2018, 07:25 PM
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Originally Posted by TurnMeLooseFLKeys View Post
What speed/rpms are you expecting at cruise and top end?
Wow, that is soo far ahead of where I am now I can truly say, I have no idea how fast this thing will go when I'm done. Right now I'm just focused on trying to get the thing straight!

But just for fun, I was thinking if I run the thing at around 2000 rpm cruise, it'll probably be a lot more effecient and then I can bring my charter prices down quite a bit. I know that most boats here in the 40 foot range charge 1750 for a trip, so i bet with the boat being lighter, i can cruise at 2000, still go faster then them, and charge 1350 for the full day offshore trip.

But really, the speed thing is just a try and see thing. With 900 horsepower, and the weight fairly low (everything topside will be corecell cored, I already have the foam) , I'm hoping for 23-25 knot cruise at 2K, but I really have no idea whatsoever. But I'll be happy as long as it just floats and goes straight...

I do know that it'll never see top end. It's ironic, because I love racing the heck out of my car, but I prefer to be nice to the boat diesels, I just can't bring myself to push anything that floats to the pins...that probably started when I was young. I used to sneak my dad's boat out when I was 14, and one day I wanted to see how fast it could go, so I gave it all the gas. And it broke the driveshaft...every since, cruise is good enough...
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Old 03-14-2018, 07:35 PM
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Originally Posted by signmansez View Post
Capt. John, love your threads on the boat builds.
I drive by this little marine sales place in Pinellas Park (St. Petersburg, Fl) on a weekly basis and they have what looks like a Bertam Moppy hull sitting in the parking lot. It's been there for several years and looks like it's never been touched since it came out of the mold.

If you are interested I could stop by and gather some info and more pictures. This hull is right up your alley and it's ready for your finishing touch!

Keep up the good posting. Very interesting!

PARKSIDE MARINE , PINELLAS PARK FL | Florida-Fictitious-Names.com
Wow, that is cool. I would love to finish a project like that. There is no way to get it here anymore, they just changed over the port captain here, and now there are soooooooooooo many new rules on importing a boat that it would be the most expensive moppy in the world by the time I got it here. For the moment, we can still build boats, so I have to get it all out of my system now because I'm sure they will change that too soon,
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Old 03-14-2018, 07:37 PM
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Originally Posted by jtcwhaler View Post
My pleasure. And thanks for hooking me up with the charter up at Papagayo. Ended up booking with Rick of Dream On (in a week). Hoping the wind calms down.
Very unexpected, but very much appreciated. I do hope that one day you make it to Quepos and we can catch you some huge fish!
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Old 03-14-2018, 07:57 PM
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Super glad to see this thread up and running again. And the mold sides for the 40 look real ruff. But I know you are the guy to tackle it. Rag’s
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