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#1
03-18-2012, 08:19 PM
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Re-coring the fuel tank floor hatch
Just finishing up my latest project. Since the fuel tank is pulled and the engine is dismantled, figured I might as well work on some inexpensive repairs. This was a pretty simple repair. Found everything I needed to know doing searches on this site.
Last edited by awthacker; 03-18-2012 at 08:30 PM. 
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#2
03-18-2012, 08:25 PM
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First step was to cut around the edges of the old core with an angle grinder, then pry the bottom layer of mat off the wood core. Then used a hammer and chisel to remove the 6" plywood squares. Then cleaned it up good with the grinder.
Next was the new core. I went with standard non treated plywood, 5/8" thick. I think I could've gotten away with 1/2" and it might've been a bit lighter. Used resin to glue the ply to the fiberglass hatch, then weighted it with whatever was available. Notice the 1/4" holes drilled through the wood to allow the resin to adhere well and prevent air bubbles. Then glass mat over the wood core.
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#3
03-18-2012, 08:29 PM
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I ran out of resin when laying my mat, so I didn't get it as wet as I should have and there were alot of bubbles around the edges. I did mitre my edges 30 degrees, but 45 degrees would've helped the mat lay a little flatter. I decided the bubbles were bad enough to need correction, so more grinding, then glassing. Finally was happy with the glass job, so time to sand and paint the top. I still had just enough leftover paint from my floors. Just installed the access covers, but no pics of the last step.
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#4
03-19-2012, 08:42 AM
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Aaron, that really looks great!!...did mine recently...1st FG job I've ever done and I FORGOT to weight it down like you did...so I get a little "feel" to walking on it...AND I didn't bevel the edge of the wood...BIG MISTAKE...you are right; this allows the fabric to lay over the edge easier...I'll use it as is for a while, but eventually redo again...
Your paint job came out GREAT, too...when ya get 'er all done, yer gonna have a real LOOKER on yer hands!!..pics when you get her finished up...  ...you do good work...
__________________
'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha 
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#5
03-19-2012, 10:09 AM
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Good job. I've been reading a couple of books about fiberglass work. Jerry Adams, the fella doing the work on my V20 said, Once you understand the basic principles, if ya can do a decent patch, you can build a 100 foot yacht.
__________________
1985 Wellcraft V-20, Evinrude ETEC 150: SOLD 1979 Marine Trader 44, twin Ford Lehman 120s 2006 Panga 14, Tohatsu 20
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#6
03-19-2012, 03:09 PM
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Quote:
What book titles are you reading?... 
__________________
'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha
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#7
03-19-2012, 04:01 PM
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Quote:
Fiberglass Boat Repairs Illustrated by Roger Marshall and The Fiberglass Boat Repair Manual by Allan H. Vaitses http://www.amazon.com/Fiberglass-Rep.../dp/0071549927 http://www.amazon.com/Fiberglass-Boa.../dp/0877422281
__________________
1985 Wellcraft V-20, Evinrude ETEC 150: SOLD 1979 Marine Trader 44, twin Ford Lehman 120s 2006 Panga 14, Tohatsu 20
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#8
03-19-2012, 04:21 PM
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Quote:
Thanks Bradford...those look pretty good...
__________________
'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha
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#9
03-20-2012, 06:42 AM
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I want some good reading material on modern techniques. Infusion, vacuum bagging etc. My local library didn't have squat.. Your glassman is right Bradford. I am sloppy with glass, to watch a pro do it for a while helps but it still takes a lot of skill to do a clean job.
Hatch looks great BTW..
__________________
 1996 -19' NV Flats 115 Mercury 4-stroke 1983 -20' Wellcraft Center Console 250 XS
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#10
03-21-2012, 07:44 AM
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Quote:
http://myweb.cableone.net/bcanderson...um/Vacuum.html http://www.bertram31.com/proj/tips/vaccuum.htm http://www.youtube.com/watch?v=sA8kIEbQ4uY Not books, but some info for ya!!...Google is full of this stuff...the only vacum bag I know about is the one my wife makes me change when it's full of dog hair...  Now if I can just figure out where it comes from... And now back to Thacker's original thread...
__________________
'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha
Last edited by reelapeelin; 03-21-2012 at 07:56 AM.
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