Aluminum River Boat Build
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Aluminum River Boat Build

  1. #1
    AAARRRRRGGGGGGG!!!!! Motomatt68's Avatar
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    Default Aluminum River Boat Build

    I bought a new project this winter. It was full water, mud, beer cans, kids toys, lots and lots of wasps nests, a rotted floor, rusty seats, two dead motors, and a dead bird. Several trash cans later I got it to this state.

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    I am got a pump from ap67et10 and an intake from Tom at jetboatperformance.

    (I cant get the picture of the pump and intake to load. I will take some new ones tomorrow.)

    I got an engine from a local guy. It is a VolvoPenta 260a.

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    The boat was originally set up with a spin thing that stuck out the back so I have some cutting and welding to do. I have not fully decided where to place the pump. I am going to set it back but I am not sure how far to go. The transom is about 6 inches forward of the back of the hull so it should be easy to set it so getting to the clean out will be easy.

    I dont know if this is the kind of thing that you guys are interested in but I have found more good info here than any other forum that I have been apart of.

    I will up date this as I get things done.

    Thanks, Matt.

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  3. #2
    History Repeating Storz's Avatar
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    Thats cool!
    '84 Laser LTV - Restoration in progress
    '77 Caribbean

  4. #3
    Senior Member Xerophobic's Avatar
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    interesting project, I would advise you to stay away from using a cast intake tho. Fab one from aluminum yourself. One of the biggest advantages to having an alloy hull is the ability to scrape bottom here and there if you want or need to. Cast intakes dont like that usually, and if it has the fins on it still forget it.

    Looking forward to more pics...
    If you ain't hittin bottom...you ain't jetboatin!

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  6. #4
    AAARRRRRGGGGGGG!!!!! Motomatt68's Avatar
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    The intake is cast. It has the fins too. I really dont know about my fabbing skills but making an intake sounds interesting. The intake I got is supposed to be the kind used on the north west rivers. It was new old stock so I got a great deal on it.

    I am doing this on the cheep and using what ends up fitting my budget. I have some plans for building a boat but that will take too long. I am planning on using this as a learning experience. Everything I do will be able to be moved to the new boat. Except the intake which will be welded in.

    I have had very different responses from people who have seen it. Mostly good. One very negative. All from very knowledgeable people.

    I will get a picture of the intake and pump on today.

    Thanks, Matt

  7. #5
    Senior Member jetboatperformance's Avatar
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    Heres the Intake pics for you Bud


  8. #6
    AAARRRRRGGGGGGG!!!!! Motomatt68's Avatar
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    Thanks for the pics Tom.

    One of the things that was brought up was porpoising and bow steer.

    I know what porpoising is and figured that I could solve it with trim tabs. Also, I wont get this thing above 50 very often if ever.

    I can guess what bow steer is but what is it? The other boat I have has a deep bow but much more dead rise. Of course it never gets above 50 either.

    My goal is a reliable boat that can hit a rock every now and then with out sinking that gets decent mileage () and can plane at a relatively low speed through shallow water. I can guarantee that I will hit a sand bar at least once a day. There are not a lot of big rocks but definitely some.

    Plus I spent a few hundred on the boat and will use about 150$ in aluminum so even if it totally sucks I have spent a lot of time learning. I definitely learn the best hands on. As long as it doesn't sink and take the engine, pump, and everything else with it.

    Matt.

  9. #7
    Senior Member DuaneHTP's Avatar
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    The boat should work for that. Bow steer is when the vee is deep enough in the water to make the front of the boat act like a Lazy Ike fishing lure and it's hard to hold on course. Also will cause spin out if the boat were to run at higher speeds.
    Duane HTP

  10. #8
    Senior Member ap67et10's Avatar
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    here you go matt!
    thats a cool little boat you got there, Im looking forward to seeing it come to life.

    Andrew


  11. #9
    Senior Member Xerophobic's Avatar
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    Quote Originally Posted by Motomatt68 View Post
    Thanks for the pics Tom.

    One of the things that was brought up was porpoising and bow steer.

    I know what porpoising is and figured that I could solve it with trim tabs. Also, I wont get this thing above 50 very often if ever.

    I can guess what bow steer is but what is it? The other boat I have has a deep bow but much more dead rise. Of course it never gets above 50 either.

    My goal is a reliable boat that can hit a rock every now and then with out sinking that gets decent mileage () and can plane at a relatively low speed through shallow water. I can guarantee that I will hit a sand bar at least once a day. There are not a lot of big rocks but definitely some.

    Plus I spent a few hundred on the boat and will use about 150$ in aluminum so even if it totally sucks I have spent a lot of time learning. I definitely learn the best hands on. As long as it doesn't sink and take the engine, pump, and everything else with it.

    Matt.
    Feel free to PM me with any questions about how to fab an intake. If you're only making one it wouldnt be that big a job and trust me the first time you hit one of those cast aluminum fins on a solid rock you will wish you had! No one and I mean no one runs anything sticking below the bottom of an alloy riverboat that intends to ever hit anything. I wouldnt even slide over a mild gravel bar with that intake setup....

    Whats the thickness etc of the bottom of the hull?
    If you ain't hittin bottom...you ain't jetboatin!

  12. #10
    AAARRRRRGGGGGGG!!!!! Motomatt68's Avatar
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    I will be asking you questions about fabbing an intake. I plan on using what I learn on this boat on the boat I am going to build. With this boat I want to get something on the water this spring that I can do a lot of learning about aluminum and boat fabrication. It is more something that I can hack on and change around and not worry about. I have built wooden boats and done steel fabrication with off road vehicles but this is my first time with aluminum.

    The intake will be welded to a 3/8th inch piece of 6061 that I am replacing part of the keel with so it will have a lot of support. I could cut the fins off of the intake. I can also reweld them if they break.

    The hull is 1/8 inch. I assume 5052 or 5086 but I don't know. I know that this is thin and not ideal but it is better than the fiberglass boat that I am using now.

    The boat has no identifying markings. From the style and accessories I am assuming it is from the early 60's.

    I appreciate you input and would like to hear more. You will probably be sick of me when I start my other boat.

    What boat do you have? Did you build it? What type of water do you run it on?

    Thanks, Matt.

  13. #11
    Senior Member Xerophobic's Avatar
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    Sounds like a decent plan, skim off a small peice of that 3/8, thats exactly what you would make your intake out of

    Problem with whacking a cast fin on something is you may well crack the whole intake and if you hit something really hard the boat may sink. I think it would be worth the effort to fab one so the bottom of the boat is smooth, fabricated intakes can take way more abuse, trust me LOL 1/8" is certainly thin but you have the right idea with the keel insert. You could always also install a steel skid plate over a certain area to make up for the thin hull. of course ideally thats better when bolted to something sturdy, but you work with what you have.

    I worked for OEM, you may wanna check out their site for pics/ideas etc(www.outlaweagle.com/forum, make sure you look at the "in the shop" section) and I've hit the "odd" thing in a jetboat haha



    Few really hard hits in this clip, downstream is so much trickier

    Last edited by Xerophobic; 03-29-2010 at 09:54 PM.
    If you ain't hittin bottom...you ain't jetboatin!

  14. #12
    Senior Member ravencrew's Avatar
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    These videos might give you a little insite too. We put these together to explain a little bit about the river racing boats but all applies to river boats Scroll down to the bottom this is where the repair videos are. Hope it helps.

    http://www.ravenracingvideo.com/inde..._Racing-Videos

  15. #13
    AAARRRRRGGGGGGG!!!!! Motomatt68's Avatar
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    I have finally gotten back to building my boat. I have had finals and been waiting for material. I got a lot of great feed back and really like the stuff xerophobic pointed me towards.


    I welded in the intake and added a strong keel plate that both the intake and engine will be mounted to. From the side it looks like the intake is pointing up quite a bit but it is not.

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    The first photo shows the pump and the second shows how far back it really is from the trailing edge of the hull. The red line is about where the back of the hull is.

    I have more pictures but I am having trouble loading them. I am guessing that the server is busy. I will try again later.

    Matt.

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