Grumman Resto

[nb14]

Hello All!!
Been doing lots of reading on here over the past few months and have learned a bunch. I bought an 89' Grumman MasterFish (alum) a few months that needed some work. I'm replacing the deck and transom and tossing out the nasty carpet, as well as re-bucking few loose rivets (Gluvit has been ordered!!) I'll be posting pictures soon. My brother and I started today and we got the old deck removed as well as all the old pour in foam dug out. Took about 6 hours but felt like we got a lot accomplished today. My first question goes out to all those who used the pink foam boards. The aluminum stringers seem pretty flimsy and the pour in foam seemed provide the extra support between them. Would the pink foam if cut right and pack tight provide the same amount of structural support? Thanks in advance to all. Pictures will be up soon!

nick

 

[Bob_VT]

Re: Grumman Resto

Welcome to iboats!

Yes. The decking should attach to those stringers by either aluminum pop rivets or stainless steel screws.

 

[nb14]

Re: Grumman Resto

Thanks for the welcome Bob. There deck was held in place with pop rivets which I drilled out today. I plan on using rivets again since I have all the tools to do it.

My question is what everyone thinks about the amount of support the pink foam boards would provide as opposed to using a pour in type foam. I would rather use the pink foam, but if it won't support the deck as well I may have to go with the pour in type. The original deck boards are 1/2". Thanks for the input.

 

[BWR1953]

Re: Grumman Resto

Foam doesn't provide structural support, it provides floatation if the hull is breached or the vessel is swamped. Structural support needs to come from the stringers, braces, deck, ribs, etc. in the vessel.

Therefore, I'd say use the pink foam for floatation and make sure that the mechanical structure is sound in and of itself.

 

[Bondo]

Re: Grumman Resto

The aluminum stringers seem pretty flimsy

Ayuh,... They will be til you reattach the deck....

 

[nb14]

Re: Grumman Resto

Thanks for the replies...pink foam it is.

 

[mikezohsix]

Re: Grumman Resto

I'm doing a Grumman 184 now, you can check out the thread by doing a search.

How about some pictures, would like to see if we're working on the same boat.....

 

[nb14]

Re: Grumman Resto

Well its been way too long since I've posted an update. I've spent more time reading on here than I have working on the boat!! Since my last post the motor has been pulled. The foam, stringers, and every single piece of wood had been pulled as well. All the loose rivets were bucked and not a drop comes through now. My transom was water soaked and was home to a family of termites.(I made $1.83 in change that I found under the deck!) I received my Gluvit in the mail the other day and tomorrow that goes on. I've scrubbed and degreased the hull and used 100 grit paper to lightly rough up the areas that I'm coating. I'll be laying pink foam once the Gluvit cures. After that comes the wood decking. This is where I have a few questions.

How much epoxy resin do you guys estimate it will take to coat both top and bottom of the deck as well as the transom? (Boat is 16ft, transom is roughly 72x18x2in)

I plan on using the US Composite Brand with the Medium hardener.

Thanks for the input guys!!

(Pictures finally!! These are from gutting day)

 

[nb14]

Re: Grumman Resto

Another productive day today. Gluvit was applied to all seams and rivets in the boat so lets hope that keeps the hull dry. While that was curing I went and picked up the wood for the new transom. I was able to squeeze the 3/4in pieces out of one sheet of ply wood. I used (2) 3/4in pieces and (1) 1/2in piece. Pieces were cut to a managable size and then Gorilla Glued together, followed by lots of clamps.

Once that dries up I'll drop it back in to drill holes and cut off the excess. I hope to get my Expoy resin ordered some time this week.
Any opinions on how much I'll need?


Thought I'd post a couple of pics of my old transom (aka Termite Hotel)

Tomorrow the stingers get riveted back in and the foam gets put in place. I'll post pics of that tomorrow.

 

[Bondo]

Re: Grumman Resto

Ayuh,... lookin' Good,...

 

[nb14]

Re: Grumman Resto

Back at it today. The Gluvit was cured and I am very impressed with it. We started the day my replacing the stingers that were pulled in the gutting process. These were riveted back in place and are much more secure than they were when we pulled the deck.

Here's the stringers back in place

After those were back in place. We went to Menards and picked up the pink extruded polystyrene. The foam here is fair priced and I paid $50 for (2) 2" sheets, (1) 1" sheet and (1) 1/2" sheet. All sheets were 4'X8'. I used almost all of the 2", most of the 1" and didn't even touch the 1/2". I found the cutting and shaping to be a big pain in the rear but we got it done. Its not pretty but its in there.

My brother (who is my partner in crime for this restore) and swung by my dads wood shop where the transom is being stored, and found that he had already began to shape the transom A few more cuts then it'll be ready for hole drilling and epoxy. My dad is a master wood worker so I trust him doing it more that I do myself. We're going to drop it in tomorrow night and mark where the holes need to be drilled.

I placed my order for one gallon of US Composites Epoxy Resin with the medium hardener. I plan to get the wood this week for the deck as well and get that cut to size.

 

[ezmobee]

Re: Grumman Resto

Great work so far! I think you got a really great price on that foam. I think it's much more expensive at my local Lowe's.

 

[accentphoto]

Re: Grumman Resto

Any more pics of the finished work?

 

[fambric]

Re: Grumman Resto

I just picked up a 1987 Grumman Aluminum Boat looks like the one I see on this forum... needs some work and I'm new at this... Have to figure out how to get the wood out from under the console and the live well... Has rivet to aluminum joists, guessing I drill out the rivets and replace with stainless screws when I replace the wood. Has anyone ever used aluminum planking as a floor instead... not sure if I can get it in 3/3 thickness, however seems like it would be easier to replace the flooring compared to making templates, cutting the wood and trying to get it to fit into nooks and crannies... is it too heavy, maybe a bit expensive... what do you think?