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30-08-2016, 10:14
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#1
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Registered User
Join Date: Oct 2014
Posts: 6
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Need source or ideas for rear instrument covers
I have a couple of old, round, bulkhead-mounted instruments on my boat. One is a Signet Marine knotlog and the other a Datamarine wind instrument. They still work great, but the plastic covers that go over the rear part of the instruments inside the cabin are brittle and falling apart. I would like to replace these because they look nice and protect the wiring from rain and spray when the companionway is open.
I've included a picture of one of the old covers below. I can't seem to find anything similar online to replace it. I also called Signet Marine and asked if they sold them or knew a source, but the answer was no and no. Does anybody know where I can buy a similar cover? Any ideas for making one or some other alternative?
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30-08-2016, 15:13
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#2
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Registered User
Join Date: May 2010
Posts: 673
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Re: Need source or ideas for rear instrument covers
these appear be pressure formed plastic. A fairly complicated process needing a mould and heated vacuum/pressure forming machine. Check out rubberised paint, liquid silicone, even epoxy paint to restore these without replacement.
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30-08-2016, 16:50
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#3
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Registered User
Join Date: Oct 2014
Location: Bay of Fundy,Grand Manan,N.B.,Canada N44.40 W66.50
Boat: Mascot 28 pilothouse motorsailer 28ft
Posts: 3,256
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Re: Need source or ideas for rear instrument covers
Plastic flower pots,tupperware,-check the kitchen goods section & they don't have to be round do they?
__________________
My personal experience & humble opinions-feel free to ignore both
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30-08-2016, 17:41
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#4
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Moderator
Join Date: Feb 2012
Location: Carrabelle, Florida
Boat: Fiberglas shattering 44' steel trawler
Posts: 6,084
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Re: Need source or ideas for rear instrument covers
This is a wonderful challenge. I'm with dlymn on trying to salvage the originals, or failing in that using them as molds. You say they are brittle, so you want a material that is not. Do you have space to reinforce them from the inside? Probably not where that cable comes out. I'd be inclined to try reinforcing from the inside using epoxy resin and glass cloth cut to fill the bottom and then around the inside. Messy, but I've gotten cracked plastic parts back in service that way.
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30-08-2016, 17:56
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#5
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Registered User
Join Date: Jul 2005
Location: Bellingham
Boat: Outbound 44
Posts: 9,319
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Re: Need source or ideas for rear instrument covers
Find a buddy with a 3D printer. Non-structual applications like this work pretty well with 3D plastic.
__________________
Paul
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31-08-2016, 05:54
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#6
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Registered User
Join Date: Mar 2013
Location: Onboard (Boot Key Harbor)
Boat: Cornado 25
Posts: 493
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Re: Need source or ideas for rear instrument covers
Watertight PVC junction boxes are available at your local big box store or online. Many sizes and depths, cheap and effective. Have a number on Solitaire for electronic interfaces on the backside of the cabin/cockpit bulkhead.
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"It seemed like a good idea at the time"
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31-08-2016, 09:07
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#7
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Registered User
Join Date: Mar 2006
Location: Tampa Bay area, USA
Boat: Beneteau First 42
Posts: 3,961
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Re: Need source or ideas for rear instrument covers
Quote:
Originally Posted by dc46and2
I have a couple of old, round, bulkhead-mounted instruments on my boat. One is a Signet Marine knotlog and the other a Datamarine wind instrument. They still work great, but the plastic covers that go over the rear part of the instruments inside the cabin are brittle and falling apart. I would like to replace these because they look nice and protect the wiring from rain and spray when the companionway is open.
I've included a picture of one of the old covers below. I can't seem to find anything similar online to replace it. I also called Signet Marine and asked if they sold them or knew a source, but the answer was no and no. Does anybody know where I can buy a similar cover? Any ideas for making one or some other alternative?
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In the late '70's I made a cover for our similarly mounted instruments for our (then) Cal 2-29 by using an unfinished teak dorade box from Defender. I cut down the depth of the box to just cover the instruments with wiring attached by removing a portion of the open side and then cut the closed top off about 1/2" below the inner face the top cover board so that I could add hinges on one side to make a door for access to the instrument backs. Four L-Shaped brass brackets were attached to the inside corners of the open side of the box so that it could be affixed to the bulkhead. A small 1/2 round hole was cut in the "bottom" edge of the box to one side allow the wiring to enter and a small piece of channel shaped teak trim was used to cover the wiring between the bottom side of the box and the bottom of the bulkhead. That was adhered to the bulkhead over the wiring with a few squirts from a hot glue gun once the trim had been varnished. A few coats of varnish and the box-cover looked pretty good. From what I understand, it still looks pretty good to this day.
FWIW...
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"It is not so much for its beauty that the Sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
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31-08-2016, 09:09
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#8
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Registered User
Join Date: Mar 2011
Location: PNW 48.59'45N 122.45'50W
Boat: Ian Ross design ketch 63'
Posts: 1,472
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Re: Need source or ideas for rear instrument covers
My first thought was 3" PVC from your local big box store. Build a flange and a back cover, some epoxy. I know with some care you could make it look good and do the job.
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31-08-2016, 10:28
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#9
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Registered User
Join Date: Mar 2013
Location: Winnipeg Manitoba Canada , Florida, Bahamas
Boat: Morgan 383, C&C 34, Kirby 25
Posts: 87
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Re: Need source or ideas for rear instrument covers
If the covers are in reasonable shape, or you can reinforce them so they hold thier shape you can use them to make a mould. Plaster of Paris will work. Lube the mould well. Then a little glass cloth and polyester resin to line the mould and voila new covers. Paint as required. Someone else suggested using Tupperware or plastic containers, these make excellent moulds for fibreglass as well. It gives you the opportunity to add the appropriate flanges as well.
Have fun
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31-08-2016, 11:28
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#10
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Registered User
Join Date: Sep 2013
Location: FLORIDA
Boat: 1975 NORTHSTAR 80/20 40' KETCH CENTER COCKPIT
Posts: 13
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Re: Need source or ideas for rear instrument covers
HI-CAPT C HERE. RE: COVERS: BEEN THERE DONE IT..ETC. ACTUALLY A GOOD EPOXY - THIN COAT INSIDE AND OUT - TIMES 2 - LET THROUGHLY DRY AND SET BETWEEN COATS - - PAINT AND WALLA - YOU HAVE A NEW REINFORCED COVER WITHOUT THE MESS OF MAKING A NEW ONE - YOU NOW HAVE A NEW ONE. THERE ARE SEVERAL EPOXYS ON THE MARKET - HARD AS NAILS IS A VIABLE OPTION - IT WORKS VERY WELL AND ADHERES AND STRENGTHENS AT THE SAME TIME. IT IS SANDABLE AND PAINTABLE. BE SURE TO MARK YOUR SCREW HOLES.
YOUR FRIEND IN JESUS
CAPT.CARROLE WARD
SV CASSANDRA
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31-08-2016, 17:18
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#11
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Registered User
Join Date: Apr 2015
Location: PA, sail Chesapeake
Boat: Lots of boats.
Posts: 390
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Re: Need source or ideas for rear instrument covers
Someone else mentioned PVC. They have a wide assortment of flanges, etc. that would look good and would be VERY strong. Here is a 5" cap.
DURA 5 in. Schedule 40 PVC Slip Cap-447-050 - The Home Depot
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31-08-2016, 17:23
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#12
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Registered User
Join Date: Mar 2007
Location: Ft Lauderdale, FL
Boat: 43 ft Selene/Solo
Posts: 688
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Re: Need source or ideas for rear instrument covers
Why not just use a couple of "COOL WHIP" tubs???
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Do not go where the path may lead.........
go instead where there is no path........
and leave a trail.
Ralph Waldo Emerson
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31-08-2016, 17:27
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#13
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Registered User
Join Date: Jul 2015
Posts: 41
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Re: Need source or ideas for rear instrument covers
I have seen motorcycle speed and tach back covers adapted for this. Cheap at a cycle salvage yard or aftermarket.
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01-09-2016, 06:46
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#14
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Registered User
Join Date: Oct 2014
Posts: 6
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Re: Need source or ideas for rear instrument covers
Thanks everyone for the many great suggestions. Given the amount of time I want to spend on this, I think the best idea for my situation would be to reinforce the existing covers with some sort of coating.
I think some type of epoxy would be the best for strength. I guess the "right" thing to do would be to mix up some resin and hardener from West Marine, coat the covers, then paint them. However, I'm wondering if I could get away with several thick coats of epoxy spray paint, e.g. "Rust-Oleum Specialty 12 oz. Epoxy Gloss White Appliance Spray Paint". Is this going to produce similar results to a coating of 2 part epoxy? Or are these totally different "epoxies"?
Was also considering "Plasti Dip 11 oz. White General Purpose Rubber Coating Spray", but this is described as "flexible and stretchy" so maybe it's not strong enough.
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