NorCal Kayak Anglers
Kayak Zone => Kayaks => Hobie Kayaks => Topic started by: HamachiJohn on November 01, 2017, 07:52:55 PM
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Background story: Went diving at Albion, conditions were not good, Revo 13 rolled over despite bracing best I could, and yat got pushed into some rocks in the shallowsafter rolling over. Then realized that my tubo fins (v2) on my MD180 drive were both bent. See photo.
I put a 5/16 bolt to protect the thread, and used the hammer to try to straighten out the bent rod. Could not get it to straighten out using a standard hammer.
Any suggestions?
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Clamp it in a bench vise and manipulate the free end with a large wrench, re-positioning it in the vise as you straighten each section?
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If you can make the shaft stationary on some sort of fixture. Use a propane torch or heat gun. To heat it up. Then a BFP” big fuggin pipe”, slip it over and bend it the other direction. Tap with a hammer to refine it
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I have be t some before, fount it best to just pick ip new ones and thread em in.
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Put it in a vice so it is snug but not tightened down then hit it with some Mapp gas.
Get it red hot then tighten down the vice.
Let it cool, pull it out then stand it straight up with the nut in the vice and hit it with the Mapp gas again. Do the fine tune straightening there.
Mapp burns hotter than propane. You'll have it straightened in no time.
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Use a grip/wrench/whatever, put the rod with arch facing upward (making a letter "D" instead of "K"), hold on tight, then beat the shit out of it with a hammer. 'bent mine twice this season, got it back to somewhat straight that way (straight enough, but not 100%). Please do note that my rods are the V2 version and not the MD180. I beat it pretty hard, the beating chipped my concrete floor but only left slight scratch on the rod. By the way, my bent were roughly the same shape/location with yours.
Alternatively, you can buy new parts (which you can do anyway if the beating does not work). Lastly, just like anything else, you should use your own discretion :)
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Buy a new one.
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I was able to fix one of my mast by using a sledge hammer. Protect the threads and go to town. A standard hammer will not bend it back. I did buy a new one as a spare.
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I was able to fix one of my mast by using a sledge hammer. Protect the threads and go to town. A standard hammer will not bend it back. I did buy a new one as a spare.
i would install the new one, and keep the repaired one as a spare (esp if you had to fix it multiple times already).
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Thx for all the tips. Will buy a new one, fix the bent ones to keep as a spare.
I wonder if my regular fin mast will work... They're only couple inches shorter than my turbo fin masts... Just a thought.
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Thx for all the tips. Will buy a new one, fix the bent ones to keep as a spare.
I wonder if my regular fin mast will work... They're only couple inches shorter than my turbo fin masts... Just a thought.
Maybe cut a couple inch piece off of the bent one, tap both that and the end of the regular fin mast, and join them together with a threaded rod.... Or maybe not....
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Thx for all the tips. Will buy a new one, fix the bent ones to keep as a spare.
I wonder if my regular fin mast will work... They're only couple inches shorter than my turbo fin masts... Just a thought.
Maybe cut a couple inch piece off of the bent one, tap both that and the end of the regular fin mast, and join them together with a threaded rod.... Or maybe not....
I don't have the skill set! Lol
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Those rods are pretty tough. I used regular steel head hammer just like this one. 4-5 strokes did the job for me. Quick and easy. Held it with a plier like the below.
https://www.homedepot.com/p/Husky-16-oz-Fiberglass-Claw-Hammer-N-G16CHD-HN/205386272?cm_mmc=Shopping|THD|google|&mid=sakDRc4Qo|dc_mtid_8903tb925190_pcrid_195274179091_pkw__pmt__product_205386272_slid_&gclid=EAIaIQobChMInpW5kc2j1wIVklx-Ch29sQb9EAQYBSABEgIm7_D_BwE
https://www.homedepot.com/p/Husky-16-in-Groove-Joint-Pliers-48066/203300076
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All the above !!! Then go buy a thick walled aluminum pipe that fits over the shaft with a little wiggle room and add that and something to hold it tight with in your day pack. I fixed one on an older drive with a pair of pliers and the shaft of a metal paddle pulled apart, saved the guys day on the water. Or buy and carry a spare set.
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... Or buy and carry a spare set.
That would take all of the fun out it.
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I was able to fix one of my mast by using a sledge hammer. Protect the threads and go to town. A standard hammer will not bend it back. I did buy a new one as a spare.
i would install the new one, and keep the repaired one as a spare (esp if you had to fix it multiple times already).
I only bent it once, but I have thought about it. Have taken the yak out several times since then.
I also have thought about buying a steel rod and threading the top, then cut it to size. Steel rod isn't that expensive. Not sure if anyone here has tried it?
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Buy new ones. Those masts are tempered (according to a Hobie forum post) and if you heat them glowing red, you'll change their temper. If you have a metal works or auto body shop nearby, they might be able to straighten them for you to use as back-ups, but new shafts might be cheaper.
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Hobie masts are crap. They are very susceptible to metal fatigue and will break without any warning. If you attempt to straighten a bent mast, you will weakened it in the process, further shortening its life. Better to just buy new masts.
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Hobie masts are crap. They are very susceptible to metal fatigue and will break without any warning. If you attempt to straighten a bent mast, you will weakened it in the process, further shortening its life. Better to just buy new masts.
That’s what I did! I would buy a new mast! When you break your mast later on you are going to replace the mast and sprocket. Save some money
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I ordered new masts, thx for all the replies. Until I go pick them up, I tried putting my regular fin masts in, and it fits fine, with maybe 2 inches short at the end. Will try these until I pick up my order. Whether the 2 inches of rubber fins at the end without metal rod support will function well, i will have to test.
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I also have thought about buying a steel rod and threading the top, then cut it to size. Steel rod isn't that expensive. Not sure if anyone here has tried it?
Would definitely be doable if you can find the correct grade of stainless. Although I've never broken a mast (have bent them a few times), I'd like to have a spare, so might have to give it a try...
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I also have thought about buying a steel rod and threading the top, then cut it to size. Steel rod isn't that expensive. Not sure if anyone here has tried it?
Would definitely be doable if you can find the correct grade of stainless. Although I've never broken a mast (have bent them a few times), I'd like to have a spare, so might have to give it a try...
I will give this a try as well as I am curious. [emoji3]
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I will give this a try as well as I am curious. [emoji3]
Let me know what grade is stainless you end up using.