Option 1:
Drill it out 1/16th undersized and re-tap the hole to remove the
residual bolt threads. You can
drill a pilot hole and work your way up if you like. Using left handed
drill bits you might get lucky
at some point...but I doubt it.
Option 2:
Drill it out using an oversized drill, re-fiberglass the transom and
start over. The boats are plastic,
and can be glued back together indefinitely. Obviously to make it
structural and cosmetic, some
skill is required with Fiberglass.
Cheers,
Jeff Nelson
Muir Caileag
C&C 30 - 549
On 2021-07-20 3:41 p.m., Bill Coleman via CnC-List wrote:
I have a Broken ¼ - 20 broken carriage bolt with around 2 threads
showing out my transom.
1 ½” is embedded in epoxy. An easy-out seems unlikely. I did four,
three of them unscrewed successfully, but apparently I didn’t coat
this one thoroughly enough with the Vaseline.
I am thinking that if I can heat the bolt up to around 300 degrees or
so, it will break the bond with the epoxy. A soldering iron seems
**maybe** possible, but that is only one side. I was wondering if I
could heat it up, like plumbers do with welders to melt frozen water
lines, it might be an option.
But I don’t understand enough about electrical resistance to know how
to go about it. Using a battery for juice seems risky, having seen
what happens when I have shorted them out with a wrench –
I do have a 30 amp adjustable Powerwerks power supply, which seems a
little safer.
What I don’t understand, is if I can put a positive on one end of the
bolt, and negative on the other, will it heat the bolt, or will it
just melt the insulation off the wires? Or ruin the power supply? Or
is it a factor of the gauge of the wires?
Bill Coleman
Entrada, Erie, PA
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Thanks to all of the subscribers that contributed to the list to help with the
costs involved. If you want to show your support to the list - use PayPal to
send contribution -- https://www.paypal.me/stumurray Thanks - Stu
