93 Mariah engine mount

[MikeSchinlaub]

Thx...Does Home depot even sell untreated lumber?

Any construction store like that should sell untreated.

What is wrong with the treated? asking and not debating...

Same as the varnish. Treated is meant to be liquid repellent/resistant, counter productive to absorbing resin.

I get that...I was gonna use the varnish on areas I'm not glassing in..

Like where? Every bit of structural wood should have glass over it.

appreciate it....

 

[Mariah212]

Any construction store like that should sell untreated.


Same as the varnish. Treated is meant to be liquid repellent/resistant, counter productive to absorbing resin.


Like where? Every bit of structural wood should have glass over it.

Thank you Sir...I was about give up, but I think I have turned the corner...I finally quit cutting into something and finding crumbs....

 

[MikeSchinlaub]

Don't use marine, a regular BCX is good enough. The X means it's good for exterior so the glue will hold up. WOuld not use CDX because it has to many voids

That must be why I'm always complaining about Lowes plywood.

 

[Mariah212]

Guys, as far as resin and stuff. I'm generally an epoxy guy..I love the West systems stuff because of the pumps as it is idiot proof...Total boat has some stuff that is cheaper with good reviews...Can I use epoxy with some amazon CSM? I thought epoxy didn't work with some CSM?? I have some woven material I can use instead if that is the case....Thx.

 

[Pmt133]

If you use csm it needs to be stitched. The epoxy won't dissolve the binder used with most all csm sold.

You can use epoxy, it'll be expensive.

 

[MikeSchinlaub]

The stitched 1708 glass will be much stiffer, and need some time to soak up the resin, meaning you will need to add a generous amount of thickened resin at the base of the stringers to fill in the corners or else it will probably lift.

I haven't used epoxy resin, but it needs to be more precise with the mix ratio. Polyester resin if more forgiving, cheaper, and will let you use csm.

 

[Mariah212]

Thx...I have both..I was gonna use the epoxy to get stuff in place and then use the poly resin to laminate stuff and use PVA to cure it...Is that OK?

 

[jbcurt00]

Polyester before epoxy but never epoxy before poly

 

[MikeSchinlaub]

Why use both at all? Just use the poly. If yours has wax, it will cure hard on it's own.

 

[Mariah212]

Ok.. thx...I have laminating resin, but I can round up some with wax...

 

[Mariah212]

Why did you buy a boat older than 2015?

ALL boats in the 80s and 90s and most in the 00s used wood.

Many boats today have engineered stringer tubs glued together with Plexus or other glorified glue. The glue joints become the failure point

I get what you are saying for sure...Because I use a boat about 20-25 times a year and it sits under a cover for 5 months a year...I have like 10-15K to spend on a boat...A boat isn't a great investment for sure...The 2015 and up boats are out of what I want to spend on a luxury item like this...I'm not financing or spending 40k on a boat.. I get what I got, but I can deal with it...Financial decisions like that are why I have a fully paid for home and not wasting crazy money on a very bad depreciating asset...You have to love it to deal with it...

 

[Scott Danforth]

They make MEKP squeeze bottles that are more accurate than the pumps on the west system. A proper resin measuring cup, and you are extremely accurate. If you can give yourself cough medicine in a graduates plastic cup, you can accurately measure MEKP

I would use poly on the mid 90s hull as that is what was used originally

I found that Epoxy took much longer to lay up the repair

 

[Mariah212]

They make MEKP squeeze bottles that are more accurate than the pumps on the west system. A proper resin measuring cup, and you are extremely accurate. If you can give yourself cough medicine in a graduates plastic cup, you can accurately measure MEKP

I would use poly on the mid 90s hull as that is what was used originally

I found that Epoxy took much longer to lay up the repair

When attaching the stringer to the hull am I using a laminating or finishing resin? I have laminating currently and some PVA...

 

[Pmt133]

Laminating (unwaxed) is what you want for the work. You can add wax at the end and make it a finishing resin. I didn't wax anything but the gelcoat around the bilge and cabin on mine as it was going under carpet anyway. I also figured the extra tackiness would help the expanding foam adhear to the parts under the deck and hold the fuel tank in place.

 

[Scott Danforth]

When attaching the stringer to the hull am I using a laminating or finishing resin? I have laminating currently and some PVA...

PVA isn't used until you want the gel coat to fully cure

Layup resin, followed by unwaxed gel. Followed by a layer of PVA sprayed at the end

Did you go through the links I posted?

 

[Mariah212]

PVA isn't used until you want the gel coat to fully cure

Layup resin, followed by unwaxed gel. Followed by a layer of PVA sprayed at the end

Did you go through the links I posted?

No, but I will..Had to fix some stuff at the house..

 

[Mariah212]

I really appreciate you guys pointing me in the right direction if I hadn't said it..I just know enough to get myself in trouble...

Got my BCX board as recommended...? The bottom of the stringer board is flat...My hull angle is 26 degrees...Do I need to try and cut that to 26 degrees or can I thicken up the resin and fill the gap? With what? Make a peanut butter? I see people are freaked out about silica...I'm gonna wear a mask whatever it is....Thx...

 

[MikeSchinlaub]

Cut the angle into the board, it's easy. Leave the stringers a bit tall, it's easier to trim down than to need to add.