1974 21' Supersport Rebuild

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eckhoffb

Seaman
Joined
Mar 13, 2012
Messages
53
starcraft 1.jpg

Been a long time lurker. Love these forums, lots of awesome information here. Last year I rebuilt a 17 foot Blue Fin tinny but it got small real fast. So in January I found this 21' Starcraft SS, total rebuild needed. So far I have it flipped and paint stripped off, trailer is painted and ready for bunk carpet. Just about ready for boat paint, will try to post more pictures later today. Was curious about motor on this, its a '74 Johnson 115. I know it may be a bit small for this boat as its rated for a 195 but previous owner said he pulled 2 skiers with it with no problem. What do you guys think?
 
dozerII

dozerII

Admiral
Joined
Oct 25, 2009
Messages
6,527
Re: 1974 21' Supersport Rebuild

Welcome eck:welcome:, Looks like a real nice big big project. You do realize if you get two foot itis now, your going to need a biger tow vehicle.:D
 
E

eckhoffb

Seaman
Joined
Mar 13, 2012
Messages
53
Re: 1974 21' Supersport Rebuild

Yes it is a big big project. I was actually looking for one a little smaller. 18' to 20' but in Kansas these old Starcrafts are hard to come by. Here's some more pictures.


starcraft 4.jpg
starcraft 6.jpg
starcraft 7.jpg
 
ezmobee

ezmobee

Supreme Mariner
Joined
Mar 26, 2007
Messages
23,767
Re: 1974 21' Supersport Rebuild

Welcome. Really great hull you got there! It will actually do surprisingly well with the 115. My buddy has a 21 or 22' Chieftain with a 90 on it. It's slow (only like a 25 MPH top speed) but it planes quite quickly and nicely.
 
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eckhoffb

Seaman
Joined
Mar 13, 2012
Messages
53
Re: 1974 21' Supersport Rebuild

ez that's good to know. our old boat did 34mph with a force 90. we were happy with that so it we should be fairly happy with this.

Does anyone know where to find starcraft decals and johnson decals. If the weather permits I will try to paint this weekend, I will be ready for them pretty quick
 
ezmobee

ezmobee

Supreme Mariner
Joined
Mar 26, 2007
Messages
23,767
Re: 1974 21' Supersport Rebuild

Ebay. This is where I got mine to redo my Johnson http://www.ebay.com/itm/Johnson-Out..._Accessories_Gear&vxp=mtr&hash=item5aef3c6017

Finished result: http://i176.photobucket.com/albums/w200/ezmobee/Boat Project/DSCF0687.jpg

You could also wait till jasoutside comes back from his gave-up-the-internet-for-lent hiatus and contact him. He has a guy that made him some custom decals for a number of different things (boats and motor) that were fantastic and very reasonable.
 
64osby

64osby

Admiral
Joined
Jul 28, 2009
Messages
6,799
Re: 1974 21' Supersport Rebuild

:welcome: And a very cool 21 SS:)
 
STARCRAFT16SS

STARCRAFT16SS

Petty Officer 1st Class
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Mar 25, 2008
Messages
344
Re: 1974 21' Supersport Rebuild

Welcome...:cheer2::cheer2::welcome:
 

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GA_Boater

GA_Boater

Honorary Moderator Emeritus
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Messages
49,038
Re: 1974 21' Supersport Rebuild

Welcome to the Mob, eck. She's a big girl.
 
C

concept10

Petty Officer 2nd Class
Joined
Jul 24, 2010
Messages
156
Re: 1974 21' Supersport Rebuild

eckhoffb said:
View attachment 185660

Been a long time lurker. Love these forums, lots of awesome information here. Last year I rebuilt a 17 foot Blue Fin tinny but it got small real fast. So in January I found this 21' Starcraft SS, total rebuild needed. So far I have it flipped and paint stripped off, trailer is painted and ready for bunk carpet. Just about ready for boat paint, will try to post more pictures later today. Was curious about motor on this, its a '74 Johnson 115. I know it may be a bit small for this boat as its rated for a 195 but previous owner said he pulled 2 skiers with it with no problem. What do you guys think?
Click to expand...

The 115's are strong motors, and they are very decent on the 18 footers. I was out yesterday on one, but didn't check the speed on GPS. If it were mine, I would bolt on no less than a 150. (Unless gas usage is a big concern.)

Good Luck!
 
C

concept10

Petty Officer 2nd Class
Joined
Jul 24, 2010
Messages
156
Re: 1974 21' Supersport Rebuild

eckhoffb said:
Yes it is a big big project. I was actually looking for one a little smaller. 18' to 20' but in Kansas these old Starcrafts are hard to come by. Here's some more pictures.
Click to expand...

Do you still want an 18? I have one that I have no clue what i'm going to do with it.
 
E

eckhoffb

Seaman
Joined
Mar 13, 2012
Messages
53
Re: 1974 21' Supersport Rebuild

Spent the day finishing sanding on bottom of boat. Hopefully we can shoot the bottom 2/3 this weekend.

Then flip her back over and back onto trailer. Want to get floor back in and prepped for painting the topside. All the floatation foam in it was the white styrofoam. Some was water logged but most is dry. Is there any reason not to put it back in? Figured I could use it and fill the rest up with pool noodles.

Another thing is I have about 20 sheets of exterior grade 1/2" ply, thinking about doubling it up in traffic areas to add strength. Any thing wrong with my thinking on that? Should I just go buy 3/4"?
 
classiccat

classiccat

"Captain" + Starmada Splash Of The Year 2020
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Dec 20, 2010
Messages
3,405
Re: 1974 21' Supersport Rebuild

Personally I would stick with single 1/2" and if you feel that it's too "springy" you can add structural support under the deck (for example, running aluminum angle from the stringer to the center supports).

Then you get the best of both worlds, weight and strength...plus, your windshield and consoles/windshield will fit better.

I used 3/4" in a 16' and because of the additional weight, it's one of my few regrets.
 
barato2

barato2

Commander
Joined
Dec 7, 2010
Messages
2,956
Re: 1974 21' Supersport Rebuild

remember that you can also add glass cloth to the epoxy on 1/2" and end up with nearly the stiffness of 3/4". one of our crowd (North Beach) did this and his came out great.
 
boatnut74

boatnut74

Lieutenant Commander
Joined
Aug 29, 2010
Messages
1,835
Re: 1974 21' Supersport Rebuild

What an awesome looking hull you have.

1/2" for the deck should be sufficient. Like others said you can add some supports underneath. Thats my plan for my SS.
 
D

Dirt_Farmer

Petty Officer 2nd Class
Joined
May 2, 2011
Messages
109
Re: 1974 21' Supersport Rebuild

eckhoffb said:
View attachment 185660

Been a long time lurker. Love these forums, lots of awesome information here. Last year I rebuilt a 17 foot Blue Fin tinny but it got small real fast. So in January I found this 21' Starcraft SS, total rebuild needed. So far I have it flipped and paint stripped off, trailer is painted and ready for bunk carpet. Just about ready for boat paint, will try to post more pictures later today. Was curious about motor on this, its a '74 Johnson 115. I know it may be a bit small for this boat as its rated for a 195 but previous owner said he pulled 2 skiers with it with no problem. What do you guys think?
Click to expand...

Not a boat guru by any means, but that huge transom would look awesome with a pair of 90s or 100s hanging on the back of it in my opinion.
 
D

Dirt_Farmer

Petty Officer 2nd Class
Joined
May 2, 2011
Messages
109
Re: 1974 21' Supersport Rebuild

eckhoffb said:
Spent the day finishing sanding on bottom of boat. Hopefully we can shoot the bottom 2/3 this weekend.

Then flip her back over and back onto trailer. Want to get floor back in and prepped for painting the topside. All the floatation foam in it was the white styrofoam. Some was water logged but most is dry. Is there any reason not to put it back in? Figured I could use it and fill the rest up with pool noodles.

Another thing is I have about 20 sheets of exterior grade 1/2" ply, thinking about doubling it up in traffic areas to add strength. Any thing wrong with my thinking on that? Should I just go buy 3/4"?
Click to expand...

My pics all disappeared in my thread, but that is what I did, 1/2" ply floor with another 1/2" laminated underneith in between the sringers and under the seating. It's very strong feeling now.

Ahh found a pic

83A264D1-6621-46E3-9EFD-5B7CDD377B16-2157-000004F7B5024F3E_zps2e943a57.jpg
 
E

eckhoffb

Seaman
Joined
Mar 13, 2012
Messages
53
Re: 1974 21' Supersport Rebuild

That is what i was thinking of doing. I just don't want to regret either decision i make. Never have worked with cloth and epoxy, will look into that. Thanks guys
 
E

eckhoffb

Seaman
Joined
Mar 13, 2012
Messages
53
Re: 1974 21' Supersport Rebuild

OK been getting a few things done. Bottom of boat is painted and trailer is ready to go. Weather has been nasty the last couple of days but I am ready to put her back on the trailer. Got a little sanding to do on the topside then ready to paint blue on the consoles and topsides. Here's a couple progress pictures.
2013-03-16_14-52-06_782.jpg2013-04-07_19-54-43_918.jpg

The transom has a long horizontal crack in it from a bad transom. PO tried welding it but it didn't hold. I found a piece of 1/4 inch aluminum diamond plate that i plan to bolt onto the back. Thinking I will sandwich a bunch of 5200 and hope it seals her up good.

2013-04-10_11-38-05_724.jpg2013-04-10_11-38-13_972.jpg

Is the 5200 going to work to seal up my transom?
 
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