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| Mast base repair http://www.hobie.com/au/en/forums/viewtopic.php?f=20&t=63354 |
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| Author: | Mike3642 [ Thu Aug 02, 2018 12:23 pm ] |
| Post subject: | Mast base repair |
Is there a manual for replacing the mast base? My base cracked and I demasted in the parking lot. |
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| Author: | srm [ Thu Aug 02, 2018 6:54 pm ] |
| Post subject: | Re: Mast base repair |
Replacing the mast base is pretty straight forward. Drill off the heads of the rivets at the bottom of the mast that hold the base to the mast extrusion. A 1/4” diameter drill bit usually works well. Make sure it is a sharp bit and only remove the heads of the rivets. Use a 1/8 - 3/16” diameter punch and hammer to drive the remaining rivet shanks into the mast. Slide the mast base out of the mast. You may need to use a large flat blade screw driver and hammer to carefully tap the base out. Clean any sealant/residue from the inside of the mast. Place a light bead of silicone caulk around the flange of the new mast base and install the base into the mast. You may need to tap it in lightly with a hammer/mallet. If the new mast base isn’t drilled for rivets, use the existing holes in the mast as a guide and drill 3/16” diameter holes into the base for rivets. Install 3/16” diameter stainless steel rivets to secure the base to the mast. Place a small dab of silicone on the rivets before installing and over the top of each rivet after it’s installed. Note you will need a powerful rivet gun to pop stainless rivets. sm |
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| Author: | Mike3642 [ Fri Aug 03, 2018 11:02 am ] |
| Post subject: | Re: Mast base repair |
My old one had only two rivets. Also the mast ripped out on the other side. See these pictures:https://instagram.com/p/Bl_OxXtFj8f/ I would rather not cut the bottom 1/2 inch off my mast to have a clean start at the rivet area. Do you think it would be ok with rivets around the old ripped whole? |
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| Author: | in812 [ Fri Aug 03, 2018 1:24 pm ] |
| Post subject: | Re: Mast base repair |
looks like had been broke for a while (doesn't look shiny and fresh) I'm far from expert but I don't see why you couldn't put rivets on each side. the way I see it it's mostly compression load on the base side load should be held from the lip the rivets just hold it in place for raising ? |
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| Author: | srm [ Fri Aug 03, 2018 2:46 pm ] |
| Post subject: | Re: Mast base repair |
Pretty common failure mode on older boats. Either replace the base or drill new holes in the mast/old base and put in fresh 3/16” stainless rivets. Either way, I would put four rivets into the base instead of two. sm |
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