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you've inspired me - time for a thought experiment/challenge... can i design a compact one for smaller boats/kayaks . I probably would almost never use it for myself when kayaking - but i love taking other people out to fish. I've seen thumpers in action - they have a time and a place.. but they make a significant difference when used properly. I'll post here if i sort something out and build it :^^:

I wonder if you could use a bass drum pedal in a Yak, operated manually when you want it.

i like your thought process brideportguide - from a resonance perspective... that would actually work - especially following the KISS principle :^^:

How about an upside down woofer playing rap music?

got a drum petal I would sure trade for a spare rod

Hey, I'm working on a Thumper. The only part i can't find is the Brass Shaft Coupler Adapter. It attaches to the shaft of the motor.
If that is what it is called. I just can't find one. I looked at Home Depot, Fastenal, Grainger, Amazon and ebay. What is it called Shaft adapter? Brass Coupler? Unsure. Can i get one locally in Dallas?
Thank you,
John

I can make you one in my machine shop. Probably 2 hours for the first one at $130.00/ hr.

Keep it simple. A tapping on the side of the boat has worked for 50 years. Can adjust any way you want
Always works. Don't have to load any thing.
Johnny

Call J Bobo he makes some nice thumpers. Quality craftsmen ship and well built. I got one from him awhile back and mounted in a spare compartment with the remote I don't do anything but turn it on and start catching fish. Bobo is great to deal with also.

you know it doesn't matter what it is some lazy person will diss the guy that leaped and went and got it done ..Go to some small town start a bbq business will be 30 comps in 2 weeks time.
Keep it real Jbobo and I feel your real deal.

I found a copper piece that was close to what I was looking for and just drilled a hole on each side and made it a set screw. It works. Fun project.

I wish people would quit asking Jbobo for "how to" tips. He built a great machine and has a target audience for that thumper. I on the other hand am interested in this thread because I enjoy building things myself. Too bad we can't have a thread for people that want to do it themselves and leave out all the people that want to knock us for trying.

Lucky,

Search brass motor coupler