By ring I assume you mean a U-bolt. shouldn't be a problem- I've done the same thing in Mexico when anchoring in a good chop- be sure and use an anchor bowline. -----Original Message----- From: Dan Farrell Sent: Tuesday, July 11, 2017 11:31 AM To: Msog List Subject: Re: M_Boats: Rebuilding bow ring reinforcement Well, since you asked Jerry, I've been mooring the boat by this ring. It's a small lake ( very small, only 200 odd acres) and I haven't been using the clear because without chocks I worried about chafe on the mooring line from toe rail or the bow fitting. Perhaps that is part of the problem? I rebedded this in 2015 and likely did a poor job and allowed water intrusion. The off centered force from mooring the boat here might have exacerbated this. Still, I am surprised it was an issue since the bow ring shouldn't be seeing that much water ; it is pretty high up. Dan Farrell M17 #301 jerry@jerrymontgomery.org wrote:
The wood backup is there for two reasons- to spread the load, and to give the structure a bit of compressibility, which will keep tension on the U-bolt and keep it from unwinding.
I think there has been very little problem with it, in fact this is the first time I've heard of a problem, but like all exterior hardware it should be pulled off every few years and rebedded.
-----Original Message----- From: John Schinnerer Sent: Tuesday, July 11, 2017 6:03 AM To: montgomery_boats@mailman.xmission.com Subject: Re: M_Boats: Rebuilding bow ring reinforcement
My question would be, why was there a chunk of wood used there in the first place? Rather than just bolting it to the fiberglass, maybe with some kind of resin-based stiffener.
If there was a good reason why the wood was used - flexibility? Shock absorption? spreading the stress load? etc., I'd consider that when repairing.
If no functional reason - maybe it was just quicker and cheaper as a spacer - then your idea might be fine.
I think you mean fumed silica or amorphous silica though (the powdery forms)...'colloidal' means a suspension in a liquid, which probably wouldn't mix well with the epoxy... :-)
cheers, John S.
On 07/11/2017 03:48 PM, Dan Farrell wrote:
I recently discovered that the wood used to reinforce the bow ring if my '79 m-17 had been ruined by water intrusion. The fiberglass over it's top had collapsed.
I've removed the damaged fiberglass and the wood pulp, and was planning to glass over the area little by little from the bottom up, filling in the space formerly filled by wood with epoxy thickened with colloidal silica.
Does this seem like a poor plan to anyone?
Dan Farrell M17 #301
-- 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