Re: [bolger] Need filler help
There are surely several approaches, but what I've seen recommended would
be:
- drill pilot holes thru the plywood into the transom to locate the screw
holes
- set the plywood aside and then
- drill oversize holes in the transom and floatation deeper than the screws
- fill these with epoxy thickened with silica thickener (and milled glass
fibers if you really want strength)
- redrill the screw pilot holes after the epoxy sets up
- scrub the transom down good and sand with coarse paper to scratch it up
- I'd thicken the "filler" epoxy with silica thickener (white) or wood
flour (brown)
OR
- use shorter screws that won't go thru the transom
- scrub the transom down good and sand with coarse paper to scratch it up
- butter the area with 3M 5200 and wait a week or two after assembly before
you load up the trim tabs
(Note: this would be a permanent installation.)
Roger
derbyrm@...
http://home.earthlink.net/~derbyrm
be:
- drill pilot holes thru the plywood into the transom to locate the screw
holes
- set the plywood aside and then
- drill oversize holes in the transom and floatation deeper than the screws
- fill these with epoxy thickened with silica thickener (and milled glass
fibers if you really want strength)
- redrill the screw pilot holes after the epoxy sets up
- scrub the transom down good and sand with coarse paper to scratch it up
- I'd thicken the "filler" epoxy with silica thickener (white) or wood
flour (brown)
OR
- use shorter screws that won't go thru the transom
- scrub the transom down good and sand with coarse paper to scratch it up
- butter the area with 3M 5200 and wait a week or two after assembly before
you load up the trim tabs
(Note: this would be a permanent installation.)
Roger
derbyrm@...
http://home.earthlink.net/~derbyrm
----- Original Message -----
From: "hal" <hl700@...>
> First my apologies for a non-Bolger boat question.
>
> I am going to put trim tabs on my boat and the transom is
> not flat where the tabs need to go. My thinking is that
> a plywood spacer and some kind of filler will make a
> flat surface on which to mount the tabs.
>
> The tabs themselves are attached with screws.
>
> The screws will go through the spacer and the glass transom
> into some sealed in floatation and I am very concerned about
> a water tight joint.
>
> So I have a need to fill the space between a flat piece of
> 2" x 8" plywood and some NOT flat gelcoat.
>
> Here is the plan for the spacer:
>
> Tape wax paper to the gelcoat.
>
> Thicken some epoxy to peanut butter consistancy.
>
> Apply filler to plywood and carefully press into place
> and hope all the gaps get filled.
>
> Questions:
>
> What is the best thickener for epoxy for an in
> the water whenever the boat is in the water
> application?
>
> Is there something else that would make a better
> spacer?
>
> Is there a better way to make flat attachment points
> for the tabs?
>
> When is the best time to remove the excess goop?
>
> What questions should I have asked but didn't?!
>
> Again sorry for the non-Bolger question, but I thought
> my best chance for an optimal answer was from this group.
>
> hal
>
>
>
> Bolger rules!!!
> - no cursing, flaming, trolling, spamming, or flogging dead horses
> - stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred' posts
> - Pls add your comments at the TOP, SIGN your posts, and snip away
> - Plans: Mr. Philip C. Bolger, P.O. Box 1209, Gloucester, MA, 01930, Fax:
> (978) 282-1349
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>
>
>
>
>
First my apologies for a non-Bolger boat question.
I am going to put trim tabs on my boat and the transom is
not flat where the tabs need to go. My thinking is that
a plywood spacer and some kind of filler will make a
flat surface on which to mount the tabs.
The tabs themselves are attached with screws.
The screws will go through the spacer and the glass transom
into some sealed in floatation and I am very concerned about
a water tight joint.
So I have a need to fill the space between a flat piece of
2" x 8" plywood and some NOT flat gelcoat.
Here is the plan for the spacer:
Tape wax paper to the gelcoat.
Thicken some epoxy to peanut butter consistancy.
Apply filler to plywood and carefully press into place
and hope all the gaps get filled.
Questions:
What is the best thickener for epoxy for an in
the water whenever the boat is in the water
application?
Is there something else that would make a better
spacer?
Is there a better way to make flat attachment points
for the tabs?
When is the best time to remove the excess goop?
What questions should I have asked but didn't?!
Again sorry for the non-Bolger question, but I thought
my best chance for an optimal answer was from this group.
hal
I am going to put trim tabs on my boat and the transom is
not flat where the tabs need to go. My thinking is that
a plywood spacer and some kind of filler will make a
flat surface on which to mount the tabs.
The tabs themselves are attached with screws.
The screws will go through the spacer and the glass transom
into some sealed in floatation and I am very concerned about
a water tight joint.
So I have a need to fill the space between a flat piece of
2" x 8" plywood and some NOT flat gelcoat.
Here is the plan for the spacer:
Tape wax paper to the gelcoat.
Thicken some epoxy to peanut butter consistancy.
Apply filler to plywood and carefully press into place
and hope all the gaps get filled.
Questions:
What is the best thickener for epoxy for an in
the water whenever the boat is in the water
application?
Is there something else that would make a better
spacer?
Is there a better way to make flat attachment points
for the tabs?
When is the best time to remove the excess goop?
What questions should I have asked but didn't?!
Again sorry for the non-Bolger question, but I thought
my best chance for an optimal answer was from this group.
hal