George..... I assume you have holes already in the deck for the ports.? Hold up the acrylic in place and back-drill the holes. A sharp bit will work on acrylic and it won't crack. Clean the holes and bed the windows in a bead of marine silicone. Don't know about the felt, never heard of it. After bedding the windows wipe any excess silicone off. We actually countersink the windows but I don't know what your old windows had. #8 stainless machine screws with stainless nuts on the inside. We countersink on a drill press after the holes are back drilled. Good luck..! Bob Eeg (949) 489-8227
From: griemmolo2@gmail.com To: montgomery_boats@mailman.xmission.com Date: Thu, 18 Apr 2013 19:47:09 -0500 Subject: M_Boats: M15 Ports
I am in the process of having new Ports being cut to shape out of acrylic. I will have to drill mounting holes in the Ports is there any thing special I should be thinking about. I have been told to use a very dull drill and slow speeds.
In addition when I removed the old Ports I found that there was what appeared to be felt gaskets between the Port and the cabin hull with very little if any sealing material around the edges. The gaskets seem to be good condition. Should I just remount the new Ports using the existing gaskets?
George
M15 #602
NoNameYet