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Trades & Labor Best Posts in Thread: Motorize Boat Maker

  1. mirohu

    mirohu DI Junior Member

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    I recently had a motorized pumpboat built, 17 feet (5.23 meters), 7.5 hp gasoline engine.
    Can carry 500 lbs (227 kg) of passengers and cargo.
    Boat with engine is about 300 lbs (150 kg)
    Probably 20 feet plus for 4 passengers depending on their weight.
    Builder's name is Alejandro at Martisan Beach in Bacong. He and his wife sourced and transported all the materials which reduced much of the hassle.
    Whoever builds the boat make sure to use Santa Clara marine plywood, it costs a lot more, but very good quality, everything else will fall apart.
    Use a generous amount of pioneer brand epoxy and copper nails to hold it all together.
    My sidewalls are 1/2 inch and the bottom is 3/4 inch plywood, most fishermen will use 3/8 on the sidewalls and 1/2 on the bottom.
    7.5 hp engine, stainless steel prop shaft and prop, stainless steel rudder and universal joint was purchased for PHP8500 at Lucky Terminal on the very south end of the Blvd in Dumaguete.
    7.5 hp will push my boat around 16 kmph. More power and speed would be nice, 16 hp would be a hot rod.
    Longer and heavier boat will require more hp which will increase the price by at least PHP 5000
    The engine layout uses a lot of space in the boat even though the engine is very small.
    Mount the engine as far back as possible because the best passenger space is in front of the engine.
    Materials PHP 16,000 and labor PHP 5000, epoxy paint was PHP 2000, mechanical parts PHP 8500. Total was about PHP 31,500.
    You are probably looking at about PHP 40,000 - 45,000 for what you describe.
    Took about 2.5 weeks to build.
    I have some custom things on my boat that make it much nicer than a typical fishing boat.
    I have things I would do differently on my next boat.
    Send me a message if you want more info.

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    mirohu, Apr 11, 2018
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  2. mirohu

    mirohu DI Junior Member

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    Different types of wood have different different results with termites.
    Very hard woods like mahogany hold up much better to termites and rot. Coco lumber is soft and tasty to the pests. I am not sure how marine plywood holds up to termites.
    My understanding is termites and ants generally come from the ground up. Concrete slabs make a very nice habitat for all kinds of pests which have many entry points into a structure. Building a structure on stilts limits the entry points to pests and is visible and treatable. If the stilts sit in a water or liquid basin ants and termites would not enter from the ground. Make a freestanding stairway that does not touch the structure and provide a path for ants and termites. A stilt structure can have advantages in the circulation of air and provide a shaded, dry area to park a car or motorbike underneath and easy access to plumbing. Plywood is a good building material but does have some issues with off-gassing from the glues used to laminate it together. I would not use it in a closed living space, only use with lots of natural ventilation. Every type of material and design have trade-offs.
     
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    mirohu, Apr 29, 2018
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  3. mirohu

    mirohu DI Junior Member

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    My boat is stored on a beach very close to my house, I take the engine and interior contents out when it is parked. The canopy keeps is mostly dry and clean when stored. A boat could be locked using a chain or cable. I don't see any boats my size moored and would stand a good chance of being damaged in high surf if left in the water. Another thing to consider is getting the boat in and out of the water. Today I built a bamboo rack to set the boat on that can slide over other bamboo across the sand, one person to get it into the water, two people to push it out of the water and up the angle of the beach without any lifting, otherwise it takes 4 strong people to carry the boat into the sea without damaging the bottom paint, prop and rudder. Having to carry the boat was the biggest limitation on using the boat.
    Fishing boats seem to be stored everywhere here but have not seen anything that resembles a marina or organized boat storage.
     
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    mirohu, Apr 29, 2018
    #11