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My 1976 Mako Restoration

Old 01-05-2019, 05:20 PM
  #321  
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With the super nice weather today I turned my attention back to the hull outside. I've been wanting to mount the bracket for awhile to check clearances and see how the rest of the transom will come together so I jumped at the weather window. The bracket isn't all that heavy, probably 150-200 lbs but it is large and cumbersome. I have an engine hoist but trying to use it on the rough ground the boat is sitting on would be a pain in the ass and it would be next to useless trying to get everything level. So I built a rack out of lumber and used ratchet and motorcycle straps to lift the bracket into place. It worked great and was pretty easy to level.







I only drilled two holes today because this is just the mock-up stage. If everything else (trim tabs, through-hulls, deck scuppers, underwater lights and garboard drain) fits the way I think it will I will go ahead and drill the rest of the holes. I am going to over drill the holes, back-fill them with thickened epoxy resin with a shitload of chopped strand and then re-drill the bolt holes through the thickened resin to protect the transom wood core from water intrusion. I was worried about how high the swim platform would end up and how it would clear the deck scupper tubes but its a few inches above the hull deck so that's a non-issue.





I didn't really care for how much narrower the swim platform is than the hull at first but after some consideration realized it will help with strap clearance from the transom eye-bolts to the trailer frame in the future so its all good. Pretty excited about getting this thing on there!

Also replaced the tarp covering the bow that sticks out from under the big tent and applied the CSM layer to the inside of the fish box.
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Old 01-05-2019, 05:51 PM
  #322  
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Ingenuity is the mother of invention, or ingenuity is the mother of dumbassssess that think it's a good idea to rebuild a boat? Hell yeah man, that's an awesome step to make! I always think it's fun that some steps just seem like they make such a difference. That's a good looking hind end!
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Old 01-05-2019, 06:07 PM
  #323  
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Nice fitment!
I still remember putting mine on..
I have a good friend with the same hull and bracket (a&j). It runs nice
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Old 01-05-2019, 09:56 PM
  #324  
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Looking great! Good choice over drilling and filling the holes, gives great peace of mind!
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Old 01-06-2019, 06:25 PM
  #325  
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Did a ton of sanding today. For some damn reason a few bubbles developed in the CSM inside the fishbox. So I had to grind them out and then knocked down all the high points as well.



Then did one more test fit in the boat. I am going to add a bulkhead under the front casting deck and create a storage compartment and place to mount some bump there. The front ~18" or so of the box will be underneath it and have a fixed top. It should still be pretty easy to clean after trips but fairing and finishing it will be a bit of a bitch. The level is clamped to to the back edge of the casting deck so I could get an idea of where the bulkhead will be.



Then I applied fairing compound to the battery compartment. Since this compartment is all epoxy I had to use an epoxy based fairing compound, in this case System Three Silvertip QuikFair for the sole reason that its available on Amazon. Mixed up like bondo and went on pretty easily.



Then mixed up some poly fairing compound to coat the inside of the fish box.



I also did some sanding on the livewell plug. Something is off with the gelcoat that took some extra heat to cure. It gummed up the 40 grit sand paper pretty badly for the first few passes. Don't know if it was just an excess of surfacing wax or uncured gelcoat but once I got down far enough to knock down the brush strokes it sanded normally. Need to further investigate other gelcoat catalysts.
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Old 01-07-2019, 05:13 AM
  #326  
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Great progress! You are really keeping busy!
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Old 01-07-2019, 12:35 PM
  #327  
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So the bolts that came with my bracket are not long enough to clear my transom. It did have two longer (4 1/4") bolt that were long enough, which I used to hang it. So now I need to order more. Is this;

https://www.mcmaster.com/92186a730

The correct bolt for the application? I'm not familiar with how stainless hardware is graded. I've also read that its a good idea to isolate the stainless bolts from the aluminum bracket. Do most people just delrin washers or not worry about it at all?
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Old 01-07-2019, 02:05 PM
  #328  
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3/16 SS is fine...plastic washers under the metal ones and coat the bolt and the holes with the caulk you'll be using.
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Old 01-10-2019, 08:36 PM
  #329  
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Been sanding shit. The fish box, the battery compartment and the livewell plug. Nothing to really look at on the battery compartment or fish box but the livewell plug is interesting. If you recall the gelcoat didn't cure until I put heat on it a little at a time. Then after it was dry to the touch the top layer gummed up my 40 grit sand paper pretty quickly. Once the top layer was removed the underlying material sanded fine but it was still kinda weird. So I've been sanding on it and have removed around 80% of the gelcoat. Seems to be a mixed blessing as the white gelcoat has wasted a ton of sandpaper but also revealed a few fairing flaws in the fiberglass and bondo applications. Progress is progress. Still have a TON of pinholes in the plug that will be a pain in the ass to fill and flatten but such is life.

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Old 01-11-2019, 04:53 AM
  #330  
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Originally Posted by Sharpest View Post
Been sanding shit. The fish box, the battery compartment and the livewell plug. Nothing to really look at on the battery compartment or fish box but the livewell plug is interesting. If you recall the gelcoat didn't cure until I put heat on it a little at a time. Then after it was dry to the touch the top layer gummed up my 40 grit sand paper pretty quickly. Once the top layer was removed the underlying material sanded fine but it was still kinda weird. So I've been sanding on it and have removed around 80% of the gelcoat. Seems to be a mixed blessing as the white gelcoat has wasted a ton of sandpaper but also revealed a few fairing flaws in the fiberglass and bondo applications. Progress is progress. Still have a TON of pinholes in the plug that will be a pain in the ass to fill and flatten but such is life.

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I may have missed it but will the live well be under the floor?
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Old 01-11-2019, 05:01 AM
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Look great. An old mako with a full transom and swim platform bracket is hard to beat. The room you gain by removing all the back compartments and splash well is insane. We enjoyed ours very much.
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Old 01-11-2019, 06:15 AM
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Originally Posted by fish772 View Post
I may have missed it but will the live well be under the floor?
Half under the deck and half above the deck/under the rear-facing leaning post seat.

Originally Posted by 76 Mako 23 View Post
Look great. An old mako with a full transom and swim platform bracket is hard to beat. The room you gain by removing all the back compartments and splash well is insane. We enjoyed ours very much.
I'm loving the space for sure. My leaning post will eat up some real estate but it should still be plenty of room to fish comfortably.
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Old 01-11-2019, 07:05 AM
  #333  
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Great job. Really enjoyed reading through this whole thread and seeing the usage of all the vast -- and almost endless -- amounts of available materials from resin & epoxy to fairing compounds and bondo to foam, good stuff. Looking forward to seeing the gelcoat finishing.
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Old 01-12-2019, 06:33 PM
  #334  
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Finished sanding down the first fairing layer of gelcoat on the livewell plug. Glad I did it, lots of low areas filled as you can see. On that layer I used surfacing wax in full viscosity gelcoat. As posted above it was really cold when I applied the material so it cured goofy and subsequently, sanded shitty.



This time I ordered some Duratec to try out and I have to say, I'm impressed. It replaces the surfacing wax in the concoction with the ultimate purpose of making the gelcoat self-level and develop a harder, high gloss finish. My first application of the gelcoat was with a shitty 2" chip brush from Harbor Freight and the brush strokes in the cured coating were really bad. The duratec mixed gelcoat WANTS to flatten out. This time I used a 4" HF roller and it had a bit too much nap that left some texture in the wet material but it flattened out a lot by itself. I'm sanding most of this stuff off again but it was still a neat experience to observe.



I'm going to experiment with spraying duratec thinned gelcoat through a harbor freight purple gun tomorrow. I've read just about every thread ever posted on THT about this so I have a pretty good idea of what I'm going to do but I want some hands on experience before I attempt to spray the final coat of tooling gel on the plug. I only have one quart of the black tooling gelcoat so I need to get it right the first time.
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Old 01-14-2019, 12:48 PM
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Man hand sanding really works the triceps. The front half of the fish box has too much contour to machine-sand so I've been fairing it out by hand. Got about 1/3 of the way down the length of it yesterday.

I have a whole bunch of pinholes in the duratec-thinned gelcoat on the livewell plug. I mixed it 50/50 and rolled it on pretty heavily. I guess I'll experiment with different mixing ratios between the gelcoat and duratec.
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Old 01-14-2019, 07:20 PM
  #336  
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Hand sanding is harder than it looks but nothing works better imo.

Plug is looking good, do you have a spray gun already? If you can spray I wouldn't mess with a brush or roller you will get better results with spraying. I don't think the tip on the purple spray gun at HF is large enough for gel coat, I had trouble with it. HF has a 2 mm tip gun I've been using that works good. I did watch a youtube video of a guy that drilled the tip out on one of the purple guns, he seemed like he knew what he was talking about and got good results out if it so I drilled out mine. I haven't used it yet though so I cant say how good it works.
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Old 01-15-2019, 04:59 AM
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This!!^^^^^^^
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Old 01-15-2019, 06:13 AM
  #338  
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I have a purple harbor freight gun that I am going to start experimenting with. I sprayed an entire 20' flatbed trailer with a two part epoxy paint a couple years ago with the HF gun and it came out great besides some moisture related fish-eyes. I just tossed the gun after that project was done. I figure I'll give it a shot with the unmodified gun and thinned out gel coat and then try drilling out the spray orifice to 5/64 as I've seen recommended on here. The guns are only $10 so why not! I have a refrigerated drier now and run a small particulate filter and small desiccant drier at the gun.
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Old 01-21-2019, 07:09 PM
  #339  
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Been sanding my ass off so pics aren't that exciting. Got the inside of the fish box sanded down far enough to apply my second application of fairing compound. This one is just spot repairs of small gouges and pin holes with a few slightly larger low spots to fill in. The inside corners are kind of a bitch to smooth out but its getting there.



Then started filling pinholes in the livewell plug. This time I used gelcoat thinned with Duratec 2:1. I used a brush to dab the small pin holes and rolled it on with a 1/4" knap on a few larger low areas. The shorted knap worked better for surface finish, gonna try a foam roller next time. I keep threatening to experiment with spray but haven't gotten around to it since sanding is so much fun.

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Old 01-22-2019, 04:27 AM
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Originally Posted by Sharpest View Post
Then started filling pinholes in the livewell plug. This time I used gelcoat thinned with Duratec 2:1. I used a brush to dab the small pin holes and rolled it on with a 1/4" knap on a few larger low areas. The shorted knap worked better for surface finish, gonna try a foam roller next time. I keep threatening to experiment with spray but haven't gotten around to it since sanding is so much fun.

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Haha, sanding is a lot of fun indeed. All the prepping you're doing is only going to pay off in the end.
Ever try cutting a sanding belt and using that to sand the rounded part? Works really well if you hold the two ends and rake it back and forth.
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