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Old 25 May 2015, 22:15   #1
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Country: Canada
Town: Victoria, B.C.
Make: H733 OB, H672 Jet
Length: 7m +
Engine: Mercury SeaPro 150's
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733 beaching shoe / bow guard bolt replacement

I have major corrosion on 1/2 of the SS carriage bolts that secure the stainless bow guard on my 733. Can the nuts be accessed simply by removing the bow box and accessing through the holes the filler lines run through, or does the forward deck and fuel tank have to come out? Ideas and advice welcome!
Thanks!
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Old 29 May 2015, 01:36   #2
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I'll answer my own question... There is no easy access to all the nuts, but that's irrelevant, because they are glassed over from inside. This is good as water should never infiltrate the hull if/when a bolt fails. The fact they are carriage bolts makes this job tricky. My solution was to grid the heads off, drill out the remaining square part of the bolt, then extract the remaining threads using either an extractor or welding a bolt on, depending how stubborn. To replace the carriage bolt I tack welded a hex nut on, applied sealant and tightened, then broke of the hex nut, and ground the welds off with a flapper disc.
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Old 29 May 2015, 01:39   #3
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Yikes. You take any pictures of that surgery?

Jason
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Old 29 May 2015, 11:17   #4
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Just this one of what was left of the extracted bolts...
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Old 29 May 2015, 21:33   #5
zip
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Nice job MacGyver.
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