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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 03-16-2019, 07:09 AM
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Originally Posted by loose_cannon View Post
I think a lot of the WWII landing craft were powered by 53's.
I don't want to derail this thread, but here's an interesting article on Detroit Diesels in WW II
Detroit Diesel in World War Two - The Power to Win
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Old 03-16-2019, 08:41 AM
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On the valve cover gaskets, there are 6-71 and V6-71 engines. Those two will have different gaskets. From what I remember there were a couple of different variations on the gaskets, where later models used an improved gasket. By later, I mean the last 40 years! I did in frame overhauls on three DD marine engines, and serviced a few from time to time. I am not a serviceman now, but have good recollection of Detroit engine servicing.
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Old 03-18-2019, 09:48 AM
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The last 3 pages tells me the sooner it gets Cummins B or C the better lol.
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Old 05-07-2019, 05:36 PM
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It has been a while. Any update on how the Hatteras is running? Hopefully all leaks and what not have been resolved?

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Old 05-07-2019, 06:34 PM
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Originally Posted by JCG_PR View Post
It has been a while. Any update on how the Hatteras is running? Hopefully all leaks and what not have been resolved?

JCG
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Old 05-07-2019, 08:27 PM
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Originally Posted by Argon View Post
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I need to shoot some fishing video! I'll see what I have and I'll post it up here.
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Old 05-08-2019, 01:41 PM
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He has some stuff on his instagram page
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Old 05-08-2019, 01:56 PM
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Yeah, I've seen some fishing videos on Instagram and a short vid of the boat underway, shot from a drone. Just wanted an update geared more towards how the boat is running, motor wise and those types of details.
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Old 05-08-2019, 03:03 PM
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Originally Posted by JCG_PR View Post
Yeah, I've seen some fishing videos on Instagram and a short vid of the boat underway, shot from a drone. Just wanted an update geared more towards how the boat is running, motor wise and those types of details.
Boat is running great. It hasn't been too easy though honestly. Last Thursday the fuel cooler busted and filled out tank full of saltwater. We found out because the saltwater got to all 15 injectors on the boat and then exploded a piston. But that's just part of running a charter company. Luckily I have been collecting detroit parts and I had all the injectors for the main engines ready to go, and I even picked up a sleeve kit with piston, so we just lifted the motor and swapped the piston out with sleeve. These motors are different than cummins, probably in a good way, as you have to install the sleeve with the piston already in it. So that makes it easy. There is an old timer detroit mechanic in San Jose I went to talk with before I did the thing, and there is a way to cut an old sleeve and put the piston in from the top too, and then he gave me some pointers. We put the piston all the way at the bottom of the stroke and stuck a screw in the air intake holes that are part of the sleeve and then turned the crank with a wrench and the old sleeve popped right out. It was cake, way easier than the cummins. But we fished the boat Monday and Yesterday so I guess it all worked out.

One thing I could use help with are the injector tips for the kubota motor on the Phasar Genset. They don't exist in Costa Rica. We put them in an ultra sonic cleaner for 2 full days with some nasty chemicals and they are spraying ok now, but I would really like the change them out and the SPRINGS. Saltwater changes the chemical composition of spring metal and they are now 100 times more likely to break. So before that happens I'd like to change them out. The springs that are in the injectors, not the valve springs, although sometimes they break too if you get saltwater in the oilpan. Luckily for me it was only in the fuel supply though. DN4PDN154 zexel is the number of the tip, anybody know a good online retailer for diesel injector tips and springs? I need 3...
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Old 05-08-2019, 03:08 PM
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On the oil leaks, it hasn't impressed me much. I mean there are some small leaks here and there, but overall it's not as bad as I thought. I built one of my oil catcher things on the bilge pump, and then I float some hog pads around in there and the boat bilges super clean. We are always fixing small leaks, but it's the same on the cummins. I have been super impressed that everything usually works on the boat. I expected alot more problems. This last weekend was tough, but other than that we haven't had any major issues. And that was major, but it was only two or three days of work, it wasn't catastrophic...

On a side note, I eliminated the fuel coolers. That is why the tank filled up with saltwater. I don't understand why anybody would put a fuel cooler on the boat. We are in a hot area here, and we eliminated all the fuel coolers on all of our boats and nobody even notices. You notice because they don't bust and fill your fuel tank full of saltwater, but the motors run fine, the deck doesn't heat up at all. I just don't get it. Some dang engineer somewhere trying to complicate everybody's life. The detroits I looked for the coolers when I first bought it to by pass them. That was my first thought when I got the boat. But it was tricky as they are part of the tranny cooler, and I didn't think they would share a cooler. I am replacing both the tranny coolers tomorrow with one that only cools the tranny and not the fuel, although the fuel side just has plugs in the holes as it's busted alreday. I'm going to use the same coolers I have on my cummins transmissions, they are the same diameter. And new and cheap. I can get the Mr. Cool tranny coolers with the CN material for like 250 bucks a side.

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Old 05-08-2019, 03:20 PM
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Other thoughts on what I could have done better, when I designed the sound system, I did an inside and an outside system. So the cabin speakers have their radio, and the bridge has it's radio that plays upstairs and in the cockpit. I'm finding that I wish the upstairs had it's own radio, and the whole downstairs was connected. So I'm going to do that soon. And I didn't put a big enough cable to the upstairs radio, so sometimes when the guys have everything running and hit the VHF send button, it turns the music radio off. I'm going to put a big capacitor upstairs to fix that though. I also messed up and put the same round JBL music radio upstairs and downstairs, and they have the same blue tooth name. Oooops. What else... ?? I got the flaps fixed. It made a big difference. We were stuck at 15 knots when I have 8 customers plus crew fuel and ice, now that bumped up to 17 at 2000 rpm. That was nice.

I do feel the detroits raise fish really well. But I wonder if twin cummins 450's wouldn't do just as well sometimes. There are days when they only want to eat behind the detroits, and days when they don't like the detroits, so I'm on the fence. They are definitely more positive than negative though on the fishing. The only way to really know is to put cummins in there. But the boat isn't burning a ridiculous amount of fuel, we are able to do trips at 1450 where most boats my size have to make 1750 to make money, so I'm happy with the project. Of course we do all our own mechanic work and that saves thousands and thousands of dollars. I could only imagine if I had to pay somebody this last weekend to do all the injectors and change out a sleeve in the slip on Sunday so we could fish Monday.
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Old 05-08-2019, 03:27 PM
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Blame the fuel coolers on all us hot rodders SFQ! Back in the day when there were competitions between J&T, Covington and other Detroit diesel dealers, they were looking for every ponypower they could get. We ran some races with a 100' coil of copper air conditioning tubing in a cooler of dry ice just to cool the fuel down a couple degrees before it got to the rack!

Detroits use the fuel to cool the injectors and they actually return 2/3 of the fuel pumped back to the tank after doing that cooling. The mother plant decided to cool it after it went through the rack because of this. Big tanks it isnt a problem but smaller tanks it can be, especially in hot water like you fish in!
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Old 05-08-2019, 03:28 PM
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Oh something else, for the detroit people reading this in the future The motors called for N90 injectors, but somebody put M95 injectors in the motor. For the math geeks, the N90 is rated at 70-94 ish ml per whatever, and the M95 are rated at 95-130. So the ones somebody stuck in here were ALOT bigger than original. I thought it would have been a HUGE HP difference. But for fun, I ran one side with the original N90 injectors and one side with the oversized, and at cruise, the only difference I saw was the bigger injector side smoked more and ran 3 or 4 degrees hotter. So for me, i get the theory but the stock injectors made it to cruise fine but smoked less and the motor was happier. I guess if you were over propped that might be different, but I will be using stock injectors from now on with the oversized only as standby if something breaks.
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Old 05-08-2019, 03:30 PM
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Originally Posted by bills106 View Post
Blame the fuel coolers on all us hot rodders SFQ! Back in the day when there were competitions between J&T, Covington and other Detroit diesel dealers, they were looking for every ponypower they could get. We ran some races with a 100' coil of copper air conditioning tubing in a cooler of dry ice just to cool the fuel down a couple degrees before it got to the rack!

Detroits use the fuel to cool the injectors and they actually return 2/3 of the fuel pumped back to the tank after doing that cooling. The mother plant decided to cool it after it went through the rack because of this. Big tanks it isnt a problem but smaller tanks it can be, especially in hot water like you fish in!

You know what the NHRA calls a bunch of fuel running through copper pipes in a dry ice can? A hand grenade I had an old 75 camaro I used to drag race, and they disqualified me from the track because of a home made fuel cooler!! I get the concept, and I'm sure I'm loosing a few ponies, but on the first two trips we didn't notice a difference. We have about a 200 gallon tank though if that makes a difference. And I touched the tank at the end of the first trip and it was like warm bathwater, but not like boiling or anything!

Maybe I can just set the ice chests up to drip the cold water on the tank or something

But after pulling out 55 gallons of straight saltwater from the fuel tank, I just can't see me going back to fuel coolers ever. We did 36 hours of straight mechanic work to get everything right again. Don't want to go through that ever again. And really that is the only thing that could get us in trouble if we were doing a multi day FAD trip. Two motors is nice, but if the fuel tank goes down you are out of luck
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Old 05-09-2019, 07:32 PM
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Originally Posted by SailFishQuepos View Post
You know what the NHRA calls a bunch of fuel running through copper pipes in a dry ice can? A hand grenade I had an old 75 camaro I used to drag race, and they disqualified me from the track because of a home made fuel cooler!! I get the concept, and I'm sure I'm loosing a few ponies, but on the first two trips we didn't notice a difference. We have about a 200 gallon tank though if that makes a difference. And I touched the tank at the end of the first trip and it was like warm bathwater, but not like boiling or anything!

Maybe I can just set the ice chests up to drip the cold water on the tank or something

But after pulling out 55 gallons of straight saltwater from the fuel tank, I just can't see me going back to fuel coolers ever. We did 36 hours of straight mechanic work to get everything right again. Don't want to go through that ever again. And really that is the only thing that could get us in trouble if we were doing a multi day FAD trip. Two motors is nice, but if the fuel tank goes down you are out of luck
If you desperately needed fuel coolers, you could run a double heat exchange, using dyed diesel or used engine oil as an intermediary. That's an extra pump and exchanger though.



Please excuse the 1/4 assed drawing.
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Old 05-09-2019, 08:28 PM
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Or I could just air cool it by the AC. Or run a tube through the live well. The possibilities are endless

I told the video guy to find some fishing videos of the new boat and post it on youtube. When he does that I'll post it here.
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Old 06-07-2019, 05:51 PM
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Hey guys, I guess I'll be the first to post about it, because I'm sure when Marlin magazine comes out everybody on here will see it anyways. I just had my 5th kid, a baby girl, and the charter business down here has gotten super busy (1515 trips in 2018 on 6 boats). And so it looks like I'm going to have to pick between running a charter business in paradise, which I love doing, or building stuff here in paradise, which I love doing too. The wife is worried with the 5 kids that if something happens to me she won't be able to take care of 5 kids and one of the busiest charter fleets down here. So I got an ad for Marlin magazine that will be hitting shelves July 23rd:

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Wife wants me to get a vacation rental home, which will make less than half what I make now, but it's something she says she can handle if I kill myself seeing how fast my old chevy can make it around corners here in the mountains. With 5 kids that are 1 week old, 6, 8, 10 and 15, she's probably got a point.

It took a lot of work to find the crews that I have and rebuild all the boats, I'm definetly not going to be broken up if it doesn't sell. My hope is that whoever buys it wants to add a boat to their fleet, and me and Harold and hopefully the new owner can put the 31 Bertram mold to use. I'd love to stay on, like indefinitely , to help out. I just got my Costa Rican Citizenship (I was a permenant resident before) so I refuse to leave. But I promised her I'd list it. If you any of you reading this want to move to Costa Rica and have somebody that's been here 11 years watching over you, this is your shot. I'll contractually stay on for a year, but in reality am never moving away and my heart is in the boating business here.

Anyways, check out the website we made, and if you know anybody wanting to retire in Costa Rica making an easy 6 figure income, send them the link:

Quepos Fishing Charter For Sale

Anybody that is booked with me don't worry, I will make sure the owner keeps me on for at least a year (if it even sells). And I really expect that none of the crew will change out, John W included. Hopefully this will just get me more time in the boat yard.
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Old 06-07-2019, 06:27 PM
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Damn , Good Luck John
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Old 06-07-2019, 06:51 PM
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If you do sell you need to get into rebuilding boats. I know you'd have a lot of customers in line if you were stateside
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Old 06-07-2019, 06:54 PM
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Originally Posted by doradohunter View Post
If you do sell you need to get into rebuilding boats. I know you'd have a lot of customers in line if you were stateside
As long as they ship them here the shop is open! I really really really like where I live though, I can't see myself moving back up north again. Today I spent an hour hiking through a rain forest with a monkey following me, and then took a long walk down the beach. Harold is repainting my 29 footer, so I spent the morning spraying paint. I don't think I could ever be happy stateside, nothing against it, but I don't see myself ever going back. And I just got my Costa Rican citizenship which was next to impossible. Harder doing that than rebuilding the orange boat!
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