Hi friends,
On my boat the (new) marine toilet is mounted to the pedestal with lag screws. Oddly, the screws have pulled out of the fiberglass pedestal and the toilet is basically flopping loose:rolleyes:
There seems to be no access to the inside of the pedestal, so I am planning to cut an access hole in its front face in order to install through-bolts, and cover the hole with a small deck plate.
Does that sound sensible?
Thanks,
Nick
—
Nick Tonkin
*Former* Website Administrator, C36/375IA
*Former* owner, C36 tr/fk #255, Santa Barbara, CA
I'm looking at a photo of my head and I think that might be your only option. You could also reposition the head about 1" or so and drill new holes, making sure they are far enough away from the old holes so as not to weaken the whole area. I would probably go with the inspection plate. I would use one of those Beckson deck plates for a clean installation....like this.
[url]http://www.westmarine.com/webapp/wcs/stores/servlet/ProductDisplay?produ...
Have Fun
Mike
Deja Vu
1991 MK I # 1106
Marina del Rey, CA
Yep, that's what I had in mind. I don't believe there's ever a place on a boat for screws into fiberglass that hold any load . . . especially if the load is parallel to the screws!! I think if I just moved it I would be faced with the same problem right quick. Thanks Mike
Nick Tonkin
*Former* Website Administrator, C36/375IA
*Former* owner, C36 tr/fk #255, Santa Barbara, CA
Yeah, I remember when I changed out my head those lag screws kinda surprised me too. Luckily my holes were intact. If they ever loosen up, I'll do what you're doing.
Mike
Deja Vu
1991 MK I # 1106
Marina del Rey, CA
When I removed the toilet there were three sets of holes! Not loving the PO at the moment . . . gonna use a backing plate to counteract the weakness of so many perforations!
Nick Tonkin
*Former* Website Administrator, C36/375IA
*Former* owner, C36 tr/fk #255, Santa Barbara, CA
This information could not have come at a better time. I was doing a "nutnbolt check" recently on the head when one of the hold down bolts came apart. I couldn't tell what type of bolt it was as only the head and part of the stud came out. I'm surprised anyone would use a lag bolt! I will replace all hold down bolts with through bolts and a starboard backing plate. Of course, I'll have to install a Beckson deck plate to finsh the job.
Thanks for the info.
Tony Cullen
s/v Sceptre
1995 C-36 MkII 1449 TR/FK
San Diego, CA. (Chula Vista Marina)
Always another thought!
[url]http://www.jamestowndistributors.com/userportal/show_product.do?pid=1746...
Gary Bain
S/V "Gone With The Wind"
Catalina 36', Hull #: 1056, Year: 1990, Engine: M-35
Standard Rig
Moored: Boothbay Harbor, Maine
Home: Auburn, Maine
I had the same problem with the lag bolts being stripped. I reamed out the holes bigger and I made a very thick mixture of epoxy thickened with two fillers and teak dust and plugged the holes with it. Then I re-drilled the holes and used the lag bolts into the epoxy. So far, after two years, it is fine. I was going to cut the hole and use bolts but decided to try this instead figured if it failed I would do plan B. Epoxy is far stronger than fibreglass resin and bonds well to it.
[QUOTE=Gary Bain;10846]Always another thought!
[url]http://www.jamestowndistributors.com/userportal/show_product.do?pid=1746...
Gary, I think you'd still have to cut an access hatch to use those tee nuts. They are very useful however; I've used them on cabinets that needed an almost but not quite permanently closed face. That's in wood, however, I'm not sure how the anti-rotation flanges would embed and stay embedded in fiberglass.
- nick
Nick Tonkin
*Former* Website Administrator, C36/375IA
*Former* owner, C36 tr/fk #255, Santa Barbara, CA
Nick, did you view the video? You basically inbed the Tee in epoxy. Note they basically counterbore the hole. In this case you do not break through the fibergass on the bottom. I'm not sure the area has a wood core but if it does I would clean some the wood out with a bent nail. Place the Tee on the flat surfice and add epoxy.
Gary Bain
S/V "Gone With The Wind"
Catalina 36', Hull #: 1056, Year: 1990, Engine: M-35
Standard Rig
Moored: Boothbay Harbor, Maine
Home: Auburn, Maine
[QUOTE=Gary Bain;10864]Nick, did you view the video? You basically inbed the Tee in epoxy. Note they basically counterbore the hole. In this case you do not break through the fibergass on the bottom. I'm not sure the area has a wood core but if it does I would clean some the wood out with a bent nail. Place the Tee on the flat surfice and add epoxy.[/QUOTE]
Missed the video, oops! The written blurb only describes using them on wood, with pilot hole drilled from the back. That looks cool though, I will remember that method. I don't think it would work on the head pedestal because the surface is too thin, and any hole saw I've ever used has always had some form of pilot point; even the low profile ones have a point 1/8th of an inch deeper at least. I haven't opened it up yet but I don't think it is much thicker than 3/8" or so to begin with. The specs from that page on the 5/16" nuts are for 3/8" height. I don't think the surface is thick enough to use the tee nuts. If I'm wrong I'll come back and report!
Thanks
nick
Nick Tonkin
*Former* Website Administrator, C36/375IA
*Former* owner, C36 tr/fk #255, Santa Barbara, CA
Just a thought, when you reattach your toilet, if you are using screw type connectors, try to find a proper sized screw with the finest threads on it.
You want to get the maximum bite out of the screw when it goes through the fiberglass or the epoxy. More threads per inch is a lot more important than bigger lag bolts.
I learned this after working on my boat toilet mounting.
Bill Matley
Bill Matley
Duncan Bay Boat Club
Cheboygan, Michigan
Lakes Huron, Michigan,
Canadian North Channel
"Spirit of Aloha" Hull #1252
On the off chance that someone some day should read this thread to the bitter end, I can report that on my 1984 Mk I the toilet pedestal has 1/8" glass-only front face and 1/8" glass plus thin plywood (3/8"?) on the top.
Here's a picture of the finished installation of through-bolts and access port. You can see the holes left from the PO's many redos on the lag screws as they continued to pull out. Next I'll have to get the epoxy and gelcoat out :rolleyes:.
Nick Tonkin
*Former* Website Administrator, C36/375IA
*Former* owner, C36 tr/fk #255, Santa Barbara, CA
[quote=Channel Islander;10890]On the off chance that someone some day should read this thread to the bitter end, I can report that on my 1984 Mk I the toilet pedestal has 1/8" glass-only front face and 1/8" glass plus thin plywood (3/8"?) on the top.
Here's a picture of the finished installation of through-bolts and access port. You can see the holes left from the PO's many redos on the lag screws as they continued to pull out. Next I'll have to get the epoxy and gelcoat out :rolleyes:.[/quote]
Nice job. One thing though, you can't put gelcoat over epoxy. It will just go rubbery. You'll have to plug those holes with fibreglass resin.
Yikes! Thanks for the warning! Another new skill to learn . . . :)
Nick Tonkin
*Former* Website Administrator, C36/375IA
*Former* owner, C36 tr/fk #255, Santa Barbara, CA