I bought a 1976 M17 about 3 years ago with a broken keel. The center board retainer pin broke out the bottom of the keel like the center board was dropped hard against it. The pin is missing. It broke through both sides of the keel. I am finally getting ready to do this repair and looking for some guidance. Has anyone done this repair? Is this a common mishap?
Some damage from dropped centerboards is common, though yours sounds worse than most. The repair will depend on the extent of the damage, which is hard to judge without a photo. Relatively minor damage can be repaired with nothing more than thickened epoxy resin. For damage that is a little worse, you should mix in some chopped up fiberglass cloth. For more serious damage, you will want to build the damaged area back up using layers of fiberglass cloth wet out with epoxy resin. Pay particular attention to the condition of the seam where the centerboard trunk is bonded to the keel. If that seam opens up, water might migrate into the steel punchings that were used for ballast, which can cause a number of other problems. ----- Original Message ----- From: "Gary Froeschner" <gfroesch@socket.net> To: "For and about Montgomery Sailboats" <montgomery_boats@mailman.xmission.com> Sent: Monday, July 11, 2016 12:45:09 AM Subject: M_Boats: M17 busted keel I bought a 1976 M17 about 3 years ago with a broken keel. The center board retainer pin broke out the bottom of the keel like the center board was dropped hard against it. The pin is missing. It broke through both sides of the keel. I am finally getting ready to do this repair and looking for some guidance. Has anyone done this repair? Is this a common mishap?
Listen to Wheatley! Particularly about the parts of using epoxy resin rather than polyester, and inspecting carefully for any way water could get in to the punchings. Best way to thicken the epoxy is to use cotton flocking, available thru Aircraft Spruce, I think in Long Beach, CA. Gougeon's strongest thickener would also be fine. They both have websites and will mail it to you. The trick is to clean up the damage with sandpaper, then use just enough thickened resin to float over the rough part, and quickly, before the filler starts to harden, finish the job by using glass cloth. Put on a slight excess, then sand it smooth. It would be good to make a pattern before you get started so that you can re-drill the hole in the proper place. Do it on a cool day in the shade! -----Original Message----- From: swwheatley@comcast.net Sent: Monday, July 11, 2016 8:43 AM To: For and about Montgomery Sailboats Subject: Re: M_Boats: M17 busted keel Some damage from dropped centerboards is common, though yours sounds worse than most. The repair will depend on the extent of the damage, which is hard to judge without a photo. Relatively minor damage can be repaired with nothing more than thickened epoxy resin. For damage that is a little worse, you should mix in some chopped up fiberglass cloth. For more serious damage, you will want to build the damaged area back up using layers of fiberglass cloth wet out with epoxy resin. Pay particular attention to the condition of the seam where the centerboard trunk is bonded to the keel. If that seam opens up, water might migrate into the steel punchings that were used for ballast, which can cause a number of other problems. ----- Original Message ----- From: "Gary Froeschner" <gfroesch@socket.net> To: "For and about Montgomery Sailboats" <montgomery_boats@mailman.xmission.com> Sent: Monday, July 11, 2016 12:45:09 AM Subject: M_Boats: M17 busted keel I bought a 1976 M17 about 3 years ago with a broken keel. The center board retainer pin broke out the bottom of the keel like the center board was dropped hard against it. The pin is missing. It broke through both sides of the keel. I am finally getting ready to do this repair and looking for some guidance. Has anyone done this repair? Is this a common mishap?
Speaking of heavy centerboard protocol...I have a '74 M17. What I've been doing is slowly lowering the board until I feel it gently contact the stop pin, then taking up slack and putting a bit of tension on the pennant, so that the weight is not 100% on the pin (maybe almost not on the pin at all). Is that a Good Way To Do It, or if not, what is better? thanks, John S. On 07/10/2016 09:45 PM, Gary Froeschner wrote:
I bought a 1976 M17 about 3 years ago with a broken keel. The center board retainer pin broke out the bottom of the keel like the center board was dropped hard against it. The pin is missing. It broke through both sides of the keel.
I am finally getting ready to do this repair and looking for some guidance. Has anyone done this repair? Is this a common mishap?
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com
Normally I rest the centre board on the pin. The exception to that is when I expect / encounter really rough wave action. Then I hold the board about 3/4 of an inch off the pin. My pendant is 1/4 inch dynema so it doesn't stretch and has very little chance of snapping... Keith On Jul 12, 2016 10:12 PM, "John Schinnerer" <john@eco-living.net> wrote:
Speaking of heavy centerboard protocol...I have a '74 M17.
What I've been doing is slowly lowering the board until I feel it gently contact the stop pin, then taking up slack and putting a bit of tension on the pennant, so that the weight is not 100% on the pin (maybe almost not on the pin at all).
Is that a Good Way To Do It, or if not, what is better?
thanks, John S.
On 07/10/2016 09:45 PM, Gary Froeschner wrote:
I bought a 1976 M17 about 3 years ago with a broken keel. The center board retainer pin broke out the bottom of the keel like the center board was dropped hard against it. The pin is missing. It broke through both sides of the keel.
I am finally getting ready to do this repair and looking for some guidance. Has anyone done this repair? Is this a common mishap?
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com
Jerry's recommendation is the cast iron board rests on the pin. :: Dave Scobie On Jul 12, 2016 11:36 PM, "Keith R. Martin" <keith.richard.martin@gmail.com> wrote:
Normally I rest the centre board on the pin. The exception to that is when I expect / encounter really rough wave action. Then I hold the board about 3/4 of an inch off the pin. My pendant is 1/4 inch dynema so it doesn't stretch and has very little chance of snapping...
Keith On Jul 12, 2016 10:12 PM, "John Schinnerer" <john@eco-living.net> wrote:
Speaking of heavy centerboard protocol...I have a '74 M17.
What I've been doing is slowly lowering the board until I feel it gently contact the stop pin, then taking up slack and putting a bit of tension on the pennant, so that the weight is not 100% on the pin (maybe almost not on the pin at all).
Is that a Good Way To Do It, or if not, what is better?
thanks, John S.
On 07/10/2016 09:45 PM, Gary Froeschner wrote:
I bought a 1976 M17 about 3 years ago with a broken keel. The center board retainer pin broke out the bottom of the keel like the center board was dropped hard against it. The pin is missing. It broke through both sides of the keel.
I am finally getting ready to do this repair and looking for some guidance. Has anyone done this repair? Is this a common mishap?
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com
John, I found that getting a piece of rubber fuel line the length of the width of the cb slot and running the stop pin through that while it is inside the cb slot gives you a rubber bumper surrounding the stop pin. I have dropped the board, accidently, down on the pin in this condition with no damage to the keel.I think the pin is 3/8th ss so I bought the rubber fuel line which is reinforced rubber with a 3/8 inch bore. Tom B On Wed, Jul 13, 2016 at 12:11 AM, John Schinnerer <john@eco-living.net> wrote:
Speaking of heavy centerboard protocol...I have a '74 M17.
What I've been doing is slowly lowering the board until I feel it gently contact the stop pin, then taking up slack and putting a bit of tension on the pennant, so that the weight is not 100% on the pin (maybe almost not on the pin at all).
Is that a Good Way To Do It, or if not, what is better?
thanks, John S.
On 07/10/2016 09:45 PM, Gary Froeschner wrote:
I bought a 1976 M17 about 3 years ago with a broken keel. The center board retainer pin broke out the bottom of the keel like the center board was dropped hard against it. The pin is missing. It broke through both sides of the keel.
I am finally getting ready to do this repair and looking for some guidance. Has anyone done this repair? Is this a common mishap?
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com
Thanks Tom, good idea...something to do when it's back on the trailer later in the year. cheers, john s. On 07/13/2016 07:04 PM, Thomas Buzzi wrote:
John, I found that getting a piece of rubber fuel line the length of the width of the cb slot and running the stop pin through that while it is inside the cb slot gives you a rubber bumper surrounding the stop pin. I have dropped the board, accidently, down on the pin in this condition with no damage to the keel.I think the pin is 3/8th ss so I bought the rubber fuel line which is reinforced rubber with a 3/8 inch bore. Tom B
On Wed, Jul 13, 2016 at 12:11 AM, John Schinnerer <john@eco-living.net> wrote:
Speaking of heavy centerboard protocol...I have a '74 M17.
What I've been doing is slowly lowering the board until I feel it gently contact the stop pin, then taking up slack and putting a bit of tension on the pennant, so that the weight is not 100% on the pin (maybe almost not on the pin at all).
Is that a Good Way To Do It, or if not, what is better?
thanks, John S.
On 07/10/2016 09:45 PM, Gary Froeschner wrote:
I bought a 1976 M17 about 3 years ago with a broken keel. The center board retainer pin broke out the bottom of the keel like the center board was dropped hard against it. The pin is missing. It broke through both sides of the keel.
I am finally getting ready to do this repair and looking for some guidance. Has anyone done this repair? Is this a common mishap?
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com
participants (7)
-
Dave Scobie -
Gary Froeschner -
jerry＠jerrymontgomery.org -
John Schinnerer -
Keith R. Martin -
swwheatley＠comcast.net -
Thomas Buzzi