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Author Topic: 71 22-2 Flatback Re-build Watch and Comment Please  (Read 13651 times)

June 19, 2018, 05:02:44 PM
Reply #45

mshugg

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #45 on: June 19, 2018, 05:02:44 PM »
If you’re putting 4 layers of glass on your inner skin, 4”, 6”, 8”, and 12” Work pretty well.  If 3 layers then 6”, 9”, and 12”.  I think most people work largest to smallest.

June 19, 2018, 08:23:35 PM
Reply #46

Marcel4t

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #46 on: June 19, 2018, 08:23:35 PM »
So, basically I need around 14" from transom outer skin cleaned up? I'm gonna have to cut the stringers back more.
So, on this pic, do I need to grind back to the yellow arrow, or is the green mat okay?  It's pretty thick and seems well bonded. 
Also, in the corner where the hull and transom meet, how much of the old resin do I need to get out?  Its pretty flat right now, but there is still some left.


Finally got a canopy, so much better under their in this SOFL sun and rain.
1971 222

June 20, 2018, 05:37:38 AM
Reply #47

mshugg

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #47 on: June 20, 2018, 05:37:38 AM »
You definitely want clean undamaged glass everywhere your tabbing will lay.  It should be completely dull with no loose matt or globs of resin.

June 20, 2018, 05:42:15 AM
Reply #48

RickK

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #48 on: June 20, 2018, 05:42:15 AM »
Do the best you can in the corners, you will need to lay in a nice thick fillet in the corners before you lay the cloth, so being totally cleaned out isn't really required. Make yourself a "filleting tool" or 3, all different sizes and radius. I used paint stirring sticks, small and large and then I used some 1/4" scrap I had laying around and used a 1 1/4" socket to mark the radius and trimmed it.  That is the one I used in the corners of the transom/sides and transom/hull bottom.
Now you are about to create a problem for yourself - moving the lowest part of the boat forward.  Check these links out:

Here is a link to where I explain the thought of the PVC pipe
http://classicaquasport.com/smf/index.php?topic=13148.msg133124#msg133124

Here is a link to where I show what is actual problem
http://classicaquasport.com/smf/index.php?topic=13148.msg133556#msg133556

Here is a link to Hawgleg's rebuild that shows the PVC pipe installation to keep a drain at the new low point of the boat
http://classicaquasport.com/smf/index.php?topic=13148.msg134262#msg134262
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

June 20, 2018, 03:52:44 PM
Reply #49

Marcel4t

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #49 on: June 20, 2018, 03:52:44 PM »
Thanks Rick about the drain issue, I saw that before, good to know!  Do you suggest lowering the original hole in the transom? its above the floor a good 1/2 inch.  That way the drain is laying on the floor.  Id like to put a garbord into it with the type of plug that screws out but doesn't come out completely, like below. 
Is that going to be possible with a long PVC pipe?

https://www.partsvu.com/50-18661-ss-garboard-drain-plug-prem.html
1971 222

June 20, 2018, 10:40:24 PM
Reply #50

Marcel4t

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #50 on: June 20, 2018, 10:40:24 PM »
Posted a new vid, similar to the last one I posted here before, some added content.
https://youtu.be/MNaM3xobItw
1971 222

June 21, 2018, 05:16:56 AM
Reply #51

RickK

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #51 on: June 21, 2018, 05:16:56 AM »
Thanks Rick about the drain issue, I saw that before, good to know!  Do you suggest lowering the original hole in the transom? its above the floor a good 1/2 inch.  That way the drain is laying on the floor.  Id like to put a garbord into it with the type of plug that screws out but doesn't come out completely, like below. 
Is that going to be possible with a long PVC pipe?

https://www.partsvu.com/50-18661-ss-garboard-drain-plug-prem.html

You shouldn't have to worry about the original drain hole, the water will drain out no problem through the pipe.
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

July 12, 2018, 08:28:06 AM
Reply #52

Marcel4t

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #52 on: July 12, 2018, 08:28:06 AM »
Made a new video of my progress.  If you have 15 mins to waste, watch and let me know what you think, if I am missing anything or have advice to give, I more than welcome it! 

https://youtu.be/N62XiM59IQg
1971 222

July 12, 2018, 04:13:37 PM
Reply #53

theFunsmith

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #53 on: July 12, 2018, 04:13:37 PM »
And I thought my transom had a lot of holes... Couple things to comment on, the angle grinder guard firstly. It isn't always about them kicking back, sometimes those wheels let go. You can have the firmest hand around, but when the wheel goes to pieces, they are moving fast. I have seen it twice so far on my rebuild. I took a piece to the foot hard enough that it would have busted out teeth had it gone the other direction. Take the extra minute and throw it on there. The rivets in the side of the hull forward of the transom held the original Aquasport logos.

July 12, 2018, 05:26:06 PM
Reply #54

FL.flatback

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #54 on: July 12, 2018, 05:26:06 PM »
That video takes me right back to doing the same thing, minus the itching. Sure is coming along nicely. Don't forget if you want to swing by and check mine out for some ideas let me know. Just went out of Boynton the other weekend, great for drifting over the reef. Keep up the good work :thumleft:.

July 12, 2018, 05:43:36 PM
Reply #55

Marcel4t

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #55 on: July 12, 2018, 05:43:36 PM »
Noted on the wheel shattering, never had that happen, but that does scare me, so guess I gotta get a guard now..lol
Can't wait to take it outta the inlet, turn left and drift for Sails in front of the Ritz. 

So, looking at this outter skin, its wavy as heck, will this definitely straighten out when I lay glass on it with the 3/4 melamine behind it? 






1971 222

July 13, 2018, 06:06:41 PM
Reply #56

RickK

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #56 on: July 13, 2018, 06:06:41 PM »
That's a tough call. I left the entire back skin and patched/faired the transom - never got it totally straight with the melamine. The only way to get rid of that bow it cut it off and leave 2" all the way or none and start from the inside and lay up 3 layers of 1708 against the melamine.  Make sure you brace the hull so it retains it's shape. There are examples of both in the rebuild forums - mostly the 222 FB forum.
One example I remember is by Shine.
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

July 13, 2018, 06:31:16 PM
Reply #57

Marcel4t

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #57 on: July 13, 2018, 06:31:16 PM »
So you were able to get yours straight eventually with some effort?  I'm thinking of cutting the really bad areas on the upper sides.  Or may also see if it straightens up when I get some melamine screwed on.  Do you usually leave the melamine on until after you put the transom material in? 
1971 222

July 13, 2018, 07:21:21 PM
Reply #58

Marcel4t

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #58 on: July 13, 2018, 07:21:21 PM »
Okay, so I think I figured out why the back of transom is pulling in, the outer hull is bulging out.  A lot.  Like 4 inches in 16 inches away from transom.  I guess I gotta get it up on blocks and off the trailer?  Is it normal for the hull to fatten out after the transom for a bit?  I wish I had measured before I started cutting everything...rookie mistake. 


1971 222

July 13, 2018, 07:46:42 PM
Reply #59

mshugg

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Re: 71 22-2 Flatback Re-build Watch and Comment Please
« Reply #59 on: July 13, 2018, 07:46:42 PM »
Most boats of this era carry their maximum beam forward of the transom.   Since your outer skin is intact, you’re not far off in your measurements.  You can clamp 2x4s across your transom to pull things flat when you bond in your transom core, or use a piece of waxed melamine.  There is actually a bit of tumble home in the transom of my CCP.

 

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