[C320-list] Portlight Replacement/Repair?

[David Wellerstein]

I read that pressure should be about 25 pounds on the fasteners. Sound right?

Also, the forward Bowman trapezoidal hatch leaks quite a bit.  Replacement is nearly $1000.  Anyone have success with the replacement seal for about $80?  Is it as difficult to get that gasket in as the Lewmar portlights, ie, impossible?


> On Mar 26, 2022, at 2:21 PM, Christian <ccaper at gmail.com> wrote:
> 
> David, keep in mind the frames are aluminum, and the fasteners are
> stainless steel, so yes you could over torque them quite easily. But they
> should be snug.
> 
> On Sat, Mar 26, 2022, 4:07 PM David Wellerstein <dwellers at mac.com> wrote:
> 
>> Thanks for the anti-crazing tip.  I will definitely get some of that!
>> 
>> Just pulled the plastic interior frames and found a bunch of the fasteners
>> were quite loose.  I hope you can’t over-torque them but I did go around a
>> couple of times on each port.  I’ll take the hose out and see how it goes.
>> But it doesn’t look like changing them out is going to be a big deal.  Just
>> some screws, cleanup and adhesive.  Famous last words, right?
>> 
>> Thanks again for all the feedback!
>> 
>> David
>> C320 #118 Dream Catcher
>> 
>> Sent from my iPad
>> 
>>> On Mar 26, 2022, at 9:40 AM, Mark Hood <mark at hoodcanvas.com> wrote:
>>> 
>>> Hi all, To prevent crazing on ports use 210 Polish and Cleaner. We have
>>> used it for years on all our boats and regular application stops this
>> from
>>> happening. It is made in Cambridge, MA by Summer Labs and used in
>> airports
>>> throughout the world on airplane windows to prevent this, it works. Mark
>>> Hood #809
>>> 
>>>> On Sat, Mar 26, 2022 at 10:53 AM Michael Paris <mparis495 at gmail.com>
>> wrote:
>>>> 
>>>> Thanks Troy. That’s good to hear. I have the rounded ended model (Lewmar
>>>> 1RE new standard) and the replacement lens itself is $100. to $120. each
>>>> because the hinges are mounted on the lens.
>>>> 
>>>>>> On Mar 25, 2022, at 10:43 AM, Troy Dunn <troutwarrior at gmail.com>
>> wrote:
>>>>> 
>>>>> Micheal P.
>>>>> 
>>>>> We are going on six years with no discernible change in appearance.
>>>>> 
>>>>> Having said that, acrylic is incredibly sensitive to exposure to
>>>> solvents.
>>>>> Over time even the fumes of chemical solvents will introduce just
>> enough
>>>>> changes to the top layer of acrylic to induce stress fractures (aka
>>>>> crazing).  So, being careful using solvents near the lenses is
>> important.
>>>>> Soap and water only for cleaning.
>>>>> 
>>>>> Over extended periods of time UV damage will have a similar effect.
>>>> There
>>>>> really isn’t any way to prevent that.
>>>>> 
>>>>> Acrylic is relatively inexpensive and considered by most to be the best
>>>>> material for this application.  If you are attempting to DIY lenses,
>> just
>>>>> be sure to buy cast acrylic.   We buy ours from estreet plastics.
>>>>> 
>>>>> FWIW
>>>>> 
>>>>> Troy Dunn
>>>>> Hull #514
>>>> 
>>>> 
>>