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Author Topic: 1980, 246 FAMILY FISHERMAN-GAS TANK-FOAMING THE HULL  (Read 1684 times)

October 02, 2007, 09:44:31 PM
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BOB DOC

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1980, 246 FAMILY FISHERMAN-GAS TANK-FOAMING THE HULL
« on: October 02, 2007, 09:44:31 PM »
It was suggessted that when I get the boat  I consider replacing the gas tank. Anybody know why? I'm brand new to this rig, while I have fished it several times. It was also sugessted that I foam the hull after putting in a new tank? I'll probably have to replace the florring as it is a bit mushy when walking in the center.

Any direction would be appreciated.
Thanks Bob Doc, (philly nickname for Bob Dougherty)

Sláinte, 1980 246 AQUASPORT FAMILY FISHERMAN
1990 YAMAHA 150 SALTWATER SERIES HEADED TO CALIF.

October 03, 2007, 07:13:59 PM
Reply #1

GoneFission

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Floor
« Reply #1 on: October 03, 2007, 07:13:59 PM »
Is the deck "mushy" or "springy/"  The area in the center of the deck on FFs and CCPs is mosty hollow underneath, so they do not have a rock-solid feel in the center.  Mushy means soft - that would not be so good...

I would not foam under the deck - it makes it very hard to run wires, hoses, or do routine maintenance.  Also, the foam can pick up moisture, greatly increasing the hull weght and making your boat a real performance dog.  

The gas tank needs replacing if it's leaking.  If the previous owner suggested replacement, maybe they know something you don't!  I think the tank on your model is in a fiberglass tub.  Some had drains, some didn't.  If you can open a deck plate or find a way to see the back of the tank tub, you may see a hole drilled in the bottom.  If the tank leaks, you will find gas coming out that hole.  If there is no hole, your tub is sealed (or supposed to be).  Odds are it has water in it, and if the tank is leaking, maybe gas too!  If you can, drill a 1/4" hole in the back center bottom of the tub and see if anything drains out.  If it's only water, you are probably OK.  If its water and gas - it's new tank time.  This all assumes the tank is at least half full of gas.  If the tank is near-empty, you may not see the tank leak.  

Hope this helps - good luck!
Cap'n John
1980 22-2 CCP
Mercury 200 Optimax 
ASPA0345M80I
"Gone Fission"
ClassicAquasport Member #209


October 03, 2007, 09:01:22 PM
Reply #2

gmcjohnny

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« Reply #2 on: October 03, 2007, 09:01:22 PM »
that boat should have a big hatch over the gas tank just remove the floor on top of tank an inspect it that way dont drill a hole unless tank is out of your way its very close to the glass drain tank like i did after removal of tank it was rotted very bad because of water sitting in well now theres a 2in hole for a drain just remember when you put the deck lid back on silicone it down an your pie eyes seal them to johnny

October 03, 2007, 10:57:13 PM
Reply #3

GoneFission

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tank
« Reply #3 on: October 03, 2007, 10:57:13 PM »
10-4 on all the above (BTW - what's today's date?).  Anyway, the tub on most FFs and CCPs is about 6" longer than the tank.  There should be a 2x4 toward the rear that holds the tank in place.  So you don't have to worry so much about drilling though the tub into the tank, but please be careful!  Just drill through the fiberglass tub - not the aluminum tank - and see what comes out.  

You do need to 5200 the seams and holes if you replace the tank to prevent future water intrusion.  Leaky seals on the tank cover - this is wood cored, so it is often rotted - can cause tank corrosion and leakage.  Even if you don't replace the tank, you will want to caulk the tank cover seams, as well as the spashwell seams!  

See ya on the water!
Cap'n John
1980 22-2 CCP
Mercury 200 Optimax 
ASPA0345M80I
"Gone Fission"
ClassicAquasport Member #209


October 04, 2007, 04:31:00 PM
Reply #4

BOB DOC

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Re: tank
« Reply #4 on: October 04, 2007, 04:31:00 PM »
THANKS FOR YOU INFO, I REALLY APPRECIATE IT.,BOB DOC
Quote from: "GoneFission"
10-4 on all the above (BTW - what's today's date?).  Anyway, the tub on most FFs and CCPs is about 6" longer than the tank.  There should be a 2x4 toward the rear that holds the tank in place.  So you don't have to worry so much about drilling though the tub into the tank, but please be careful!  Just drill through the fiberglass tub - not the aluminum tank - and see what comes out.  

You do need to 5200 the seams and holes if you replace the tank to prevent future water intrusion.  Leaky seals on the tank cover - this is wood cored, so it is often rotted - can cause tank corrosion and leakage.  Even if you don't replace the tank, you will want to caulk the tank cover seams, as well as the spashwell seams!  

See ya on the water!

Sláinte, 1980 246 AQUASPORT FAMILY FISHERMAN
1990 YAMAHA 150 SALTWATER SERIES HEADED TO CALIF.

October 04, 2007, 04:33:02 PM
Reply #5

BOB DOC

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« Reply #5 on: October 04, 2007, 04:33:02 PM »
THANKS FOR  YOUR INFO, I REALLY APPRECIATE IT, BOB DOC
Quote from: "gmcjohnny"
that boat should have a big hatch over the gas tank just remove the floor on top of tank an inspect it that way dont drill a hole unless tank is out of your way its very close to the glass drain tank like i did after removal of tank it was rotted very bad because of water sitting in well now theres a 2in hole for a drain just remember when you put the deck lid back on silicone it down an your pie eyes seal them to johnny

Sláinte, 1980 246 AQUASPORT FAMILY FISHERMAN
1990 YAMAHA 150 SALTWATER SERIES HEADED TO CALIF.

October 04, 2007, 04:38:31 PM
Reply #6

BOB DOC

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Re: Floor
« Reply #6 on: October 04, 2007, 04:38:31 PM »
THANKS FOR THE INFO.  I REALLY APPRECIATE IT. I'll be bringing the rig up from Horseshoe Beach, fla to Chattanooga where i'll have time to work on it then eventually we'll take it to Fairhope AL which will then be home. We'll fish it in Mobile Bay and the Gulf.
Again thank for yor help., BOB DOC
Quote from: "GoneFission"
Is the deck "mushy" or "springy/"  The area in the center of the deck on FFs and CCPs is mosty hollow underneath, so they do not have a rock-solid feel in the center.  Mushy means soft - that would not be so good...

I would not foam under the deck - it makes it very hard to run wires, hoses, or do routine maintenance.  Also, the foam can pick up moisture, greatly increasing the hull weght and making your boat a real performance dog.  

The gas tank needs replacing if it's leaking.  If the previous owner suggested replacement, maybe they know something you don't!  I think the tank on your model is in a fiberglass tub.  Some had drains, some didn't.  If you can open a deck plate or find a way to see the back of the tank tub, you may see a hole drilled in the bottom.  If the tank leaks, you will find gas coming out that hole.  If there is no hole, your tub is sealed (or supposed to be).  Odds are it has water in it, and if the tank is leaking, maybe gas too!  If you can, drill a 1/4" hole in the back center bottom of the tub and see if anything drains out.  If it's only water, you are probably OK.  If its water and gas - it's new tank time.  This all assumes the tank is at least half full of gas.  If the tank is near-empty, you may not see the tank leak.  

Hope this helps - good luck!

Sláinte, 1980 246 AQUASPORT FAMILY FISHERMAN
1990 YAMAHA 150 SALTWATER SERIES HEADED TO CALIF.

October 07, 2007, 01:34:09 AM
Reply #7

ddd222

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« Reply #7 on: October 07, 2007, 01:34:09 AM »
sounds like "sound" advice you've heard here, no pun intended. A boat of that vintage very well may need a new tank. Not sure if u have to rip up most of the deck to get to the tank but if it were me, that being the case, deck up, new tank. But if u have decent access and can pressure test tank, perhaps not. If u plan on using the boat quite a bit, running some distance, and possibly putting some expensive new power on, definately something to consider. Getting into such a project can start w/ just a replacement tank, but if it were me and i had a good amount of deck up, i would take the oppurtunity to address soft deck spots, inspect stringers, transom, drains, scuppers etc. But just as important how i put things back together. If i were redoing the deck of my aquasport i would put some much needed features lacking in many models, in my model the lack of real access to the bilge and wiring harnesses for example.
      As far as re-filling w/ foam i've heard pro's/cons on both sides and i would inquire further. I DO KNOW that old foam floatation from the AS factory is a source of discontent as it often retain moisture as the boat aged and broke off eventually resting aft in some cases. Good luck and keep us updated

October 07, 2007, 09:20:35 PM
Reply #8

GoneFission

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tank
« Reply #8 on: October 07, 2007, 09:20:35 PM »
I'm retanking now - check out the Rebuilds section for info.  Good luck!
Cap'n John
1980 22-2 CCP
Mercury 200 Optimax 
ASPA0345M80I
"Gone Fission"
ClassicAquasport Member #209


 


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