Recent boat build

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marshthumper
Southern Airboat Member
Posts: 12
Joined: Mon Nov 04, 2019 6:08 pm

Recent boat build

Post by marshthumper »

Earlier this year I decided I wanted to get away from a big fiberglass boat. I wanted something aluminum, lightweight, and with good reliable power. So I started researching online and closely inspecting boats at the ramp whenever I took my boat out. I asked questions with a hunger for knowledge about people’s experience and why they chose the package on which they settled. I also read a lot on his site and silently observed people’s opinions.
After a couple months I had an idea of what I wanted and a firm vision of the end product. While never putting anything down on paper, I had a list with boxes to check off in my head. I wanted to go from a continental gpu to a more abundant parts market motor. And something still serviced in the aircraft industry. I scooped up a Lycoming 4 Cyl off this site with a good supply of spare accessories for my build. Over the next 5 weeks I proceeded in as fast a pace I could to complete a full build in my spare time.
I started by taking a few measurements and making a large order of square tubing for my rigging and cage. Once it arrived I started welding up the seat stand and motor stand as a single entity to save weight and space. I’ve never built an aluminum hulled boat. But have a reasonable idea of the balance points and basics. That said, this hull threw me for a couple loops. It’s not a straight deck and has a raked rear wash over. This creates a compound set of angles in relation to the motor stand’s angles and the motor. It made measuring things a bit more time consuming in making sure things were right. But it came out just fine in the end. I went with a side by side rear driver with a double up front. I know it seems like a lot of seating on a lil over a 12 foot hull. But it’s so I can take my kids out with my wife if I want. The boat actually floats great with four adult men and rides just as good. I was surprised when I tried it out. The boat is finished and been running it for about 2 months now. The boat has had a few kinks I’ve encountered, but overall it came out great! It rides stable and smooth. Doesn’t porpoise and has very strong performance. It’s an O360 straight valve with a lil better compression pistons and conservative cam. Spins a winglet q series 72 on a medium hub, making it 71inches overall. Using 4 foot rudders.
I had a basic idea of the budget I wanted to try and stay close to, which I managed to do relatively well. My initial goal was to stay around about $6500. I acquired the engine for $2500 with the accessories to build something and that put me right on track to meet my budget. I was expecting to pay about $1500 for a hull in need of work and $1000 on a decent prop, if I was patient enough to troll and wait to pounce. I got the hull done way under my initial price budgeted for. I ended up with $600 into my hull and an old trailer for just $200,off this site. And my search continued. I spent just over $250 on metal square tubing, through my distributor of which I have a few whole sticks leftover. I used 2 gal of super slick on the bottom at a cost of $226 after shipping. I also had diamondback roll me two pieces of round for the cage hoops for $125. I spent a lil more than planned on my prop, but wasn't worried because its a newer series and not a standard carbon prop. but I picked it up for $1250 with hub and bolts. The cage wire cost me $90. and I paid $500 for powdercoating it all. There were a few other small expenses that weren't much individually, but added together they cost about $200. I managed to reach my goal quite well. The whole build cost right at $5620 total to turn key boat in a working timeframe of just 5 weeks after accumulating all the major parts. At that rate, I have half what a comparable package complete would cost. Just with the investment of time, thought, and some effort filled actions of sweat equity, I've managed accomplish my goal alone. Now all I need are people to ride with. Cruising the river and trails alone isn't as much fun as it used to be. Miss the days of running kicker boats as a big squad down to bulldover cabins and back up to indian mound or further to oak head.
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Last edited by marshthumper on Fri Nov 29, 2019 9:33 pm, edited 3 times in total.
Homebuilt 12ft deckover with Lycoming O-360

marshthumper
Southern Airboat Member
Posts: 12
Joined: Mon Nov 04, 2019 6:08 pm

Re: Recent boat build

Post by marshthumper »

A few more pics of the build
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Homebuilt 12ft deckover with Lycoming O-360

marshthumper
Southern Airboat Member
Posts: 12
Joined: Mon Nov 04, 2019 6:08 pm

Re: Recent boat build

Post by marshthumper »

Closer to finish
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Homebuilt 12ft deckover with Lycoming O-360

User avatar
Rick McC.
Southern Airboat Member
Posts: 195
Joined: Wed Jan 11, 2017 10:14 pm
Location: Weeki Wachee, Fl

Re: Recent boat build

Post by Rick McC. »

Congrats Sir!
"Sights are for the unenlightened."
Rick
http://guntipsandtalk.com

marshthumper
Southern Airboat Member
Posts: 12
Joined: Mon Nov 04, 2019 6:08 pm

Re: Recent boat build

Post by marshthumper »

Thank you very much! I’ve been able to put a some run time into it and it’s had its share of hiccups! Already had a brand new starter fail and leave me stuck in the swamp. Also lost my fuel cap coming down an embankment and lost a bunch of fuel too. Didn’t make it home that day after running out across the lake from the ramp. Had to leave it and it got swamped when the wind spun it around. Sank flat to the bottom in 3 feet of water. Got it back with the gracious help of a couple friends. Who also used to be my employers. Mr Mike Willis and Mr Mike Pinsky.
Attachments
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Homebuilt 12ft deckover with Lycoming O-360

dave1971
Southern Airboat Member
Posts: 98
Joined: Tue Oct 28, 2014 8:35 pm

Re: Recent boat build

Post by dave1971 »

Well that sucks!!!! But you've gotten ALL the bad luck out of it!!!! Clear sailing from here on out my friend!!!! Nice looking boat!!! Good Luck to You!!!!

marshthumper
Southern Airboat Member
Posts: 12
Joined: Mon Nov 04, 2019 6:08 pm

Re: Recent boat build

Post by marshthumper »

Black Friday at the oak head
Attachments
4A979F42-1C56-4141-A1EF-23F56D30ADBC.jpeg
Homebuilt 12ft deckover with Lycoming O-360

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