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Grady White Fuel Tank Floor Cover

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  • Grady White Fuel Tank Floor Cover

    My '82 GW has two fuel tanks in the floor and the foward flooring tank cover was spongy. Removed it and found the underside fiberglass had failed and split open. Cut out damaged f/glass and found wood "wet." Don't even want to think about how water got into it cause you'd think the boat would have to be sitting under water. Question is why did they make the tank cover useing 6x6 inch squares of plywood instead of solid sheet of plywood?



    sigpic 1982 Grady White 241 Weekender, Outdrive Pre-Alpha, GM 305 V8 Engine Model 228 w/Edelbrock 1409 Carb. Bought 9/1/08 (Took 2 years to get it lauched)


  • #2
    Re: Grady White Fuel Tank Floor Cover

    i have no idea, but, i would replace the whole cover.
    FLORIDA GATORS
    TEBOW Country



    Please, NO PM's (Private Messages) regarding boat/engine problems. they will not be answered.
    That is what these forums are for. Post your questions, in the appropriate Forum.

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    • #3
      Re: Grady White Fuel Tank Floor Cover

      I'm going to rebuild the cover with solid sheet and see how it goes. If it does'nt work out I can always do something else later. This baby needs to get in the water cause I only have 3 more days on my 3-week restoration project! Ha, did I ever misjudge this project. Maybe 4-week project will get it done. This is a pic of the cover on the boats floor. Ron

      sigpic 1982 Grady White 241 Weekender, Outdrive Pre-Alpha, GM 305 V8 Engine Model 228 w/Edelbrock 1409 Carb. Bought 9/1/08 (Took 2 years to get it lauched)

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      • #4
        Re: Grady White Fuel Tank Floor Cover

        Originally posted by LX Kid View Post
        My '82 GW has two fuel tanks in the floor and the foward flooring tank cover was spongy. Removed it and found the underside fiberglass had failed and split open. Cut out damaged f/glass and found wood "wet." Don't even want to think about how water got into it cause you'd think the boat would have to be sitting under water. Question is why did they make the tank cover useing 6x6 inch squares of plywood instead of solid sheet of plywood?



        Looks to me like they were just using up scrap wood. Too bad there aren't any plywood experts about. That just might redefine the term 'buying cheap'.

        Be sure that you saturate your new filler piece in resin, top, bottom and especially all endgrains.
        For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear. They will turn their ears away from the truth and turn aside to myths.-2 Timothy 4:3-4:

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        • #5
          Re: Grady White Fuel Tank Floor Cover

          I can't even begin to figure out how the covers' "bottom" got saturated in water. Seems like the only way would be if the fuel tank bay filled up with water. I know that this boat sat trailered a long time, uncovered, out in the open. The last registration sticker was from 1999 on the bow.
          sigpic 1982 Grady White 241 Weekender, Outdrive Pre-Alpha, GM 305 V8 Engine Model 228 w/Edelbrock 1409 Carb. Bought 9/1/08 (Took 2 years to get it lauched)

          Comment



          • #6
            Re: Grady White Fuel Tank Floor Cover

            Surely the gas tank bays have drains in them? Of course that would have done no good if they never pulled the transom drain plug.
            For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear. They will turn their ears away from the truth and turn aside to myths.-2 Timothy 4:3-4:

            Comment



            • #7
              Re: Grady White Fuel Tank Floor Cover

              Not what I would expect from "Grady". Disappointing.

              Use one sheet of stabilzed (dried) plywood. It might make some sense to add a couple of strips, underneath, to make sure the ply doesn't warp. Ply has a tendency to do that.

              I think you've got it. Good job!

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              • #8
                Re: Grady White Fuel Tank Floor Cover

                Here's work progresion in pics. I put in a couple of extra support runners to take a little more weight. My son took care of the demolition and refiberglassing. It turned out solid and just have to see it's serviceablility over time. Ron







                sigpic 1982 Grady White 241 Weekender, Outdrive Pre-Alpha, GM 305 V8 Engine Model 228 w/Edelbrock 1409 Carb. Bought 9/1/08 (Took 2 years to get it lauched)

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                • #9
                  Re: Grady White Fuel Tank Floor Cover

                  If you look at the squares you will notice that the grain of each block is going in a different direction. This is done to help with dimensional stability in an effort to keep the hatches flat over time. As stated earlier, plywood will warp.

                  You ask how did the moisture get in there, either your deck plates or the hatch seams where leaking. The water wicks up under the hatch and just hangs there. Check to make sure that the glass has not been compromised anywhere

                  BTW: That's one ugly tank. Obviously the cover was leaking for it to look that bad. Have to taken it out for inspection? The bottom is first to go.

                  Replace all the hoses while your in there
                  Grady White 226
                  200 Evinrude Ocean Pro
                  Evinrude Renegade Offshore Prop

                  Furuno FCV 587 Sounder
                  Garmin 4208 Multifunction Display
                  ICOM M504A VHF
                  Shakespeare Galaxy 5225-XT Antennas

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                  • #10
                    Re: Grady White Fuel Tank Floor Cover

                    Plywood has each layer in alternating directions,

                    that wood is just parquet flooring, its not marine wood.
                    Makes no sense to use parquet, no sense at any level.

                    Its a previous owner mistake.

                    Btw, the reason parquet alternates the direction of the grain isn't for strength or eye appeal, its to reduce reflected glare from the floor.
                    sigpic
                    See FAQ Files.
                    http://forums.iboats.com/showthread.php?t=299680

                    Get the genuine factory service manual.
                    www.outboardbooks.com
                    www.*****************

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                    • #11
                      Re: Grady White Fuel Tank Floor Cover

                      Originally posted by jonesg View Post
                      Plywood has each layer in alternating directions,

                      that wood is just parquet flooring, its not marine wood.
                      Makes no sense to use parquet, no sense at any level.

                      Its a previous owner mistake.

                      Btw, the reason parquet alternates the direction of the grain isn't for strength or eye appeal, its to reduce reflected glare from the floor.
                      That is factory installation.

                      It's not parquet flooring. Itís the differing grain orientations youíre looking at. They used small squares instead of a single sheet of plywood so they can orient the grain to utilize its strength in relation to the dimensions of the panel.

                      The smaller blocks will also cause far less stress / warping than a single peice of plywood.
                      Grady White 226
                      200 Evinrude Ocean Pro
                      Evinrude Renegade Offshore Prop

                      Furuno FCV 587 Sounder
                      Garmin 4208 Multifunction Display
                      ICOM M504A VHF
                      Shakespeare Galaxy 5225-XT Antennas

                      Comment



                      • #12
                        Re: Grady White Fuel Tank Floor Cover

                        Anyone have any ideas on how to test fuel tanks for leaks without removing them. How about putting a couple gallons in and "low" pressure on filler neck? Then smell tank area for possible leaks. Or low tank pressurization, with a guage affixed, to see if it bleeds down. (I REALLY DON'T WANT TO REMOVE THEM!!!!!!) Ron
                        sigpic 1982 Grady White 241 Weekender, Outdrive Pre-Alpha, GM 305 V8 Engine Model 228 w/Edelbrock 1409 Carb. Bought 9/1/08 (Took 2 years to get it lauched)

                        Comment



                        • #13
                          Re: Grady White Fuel Tank Floor Cover

                          Originally posted by dingbat View Post
                          That is factory installation.

                          It's not parquet flooring. Itís the differing grain orientations youíre looking at. They used small squares instead of a single sheet of plywood so they can orient the grain to utilize its strength in relation to the dimensions of the panel.

                          The smaller blocks will also cause far less stress / warping than a single peice of plywood.
                          they don't add anything far as I can see except weight, soon as you step on it the seams want to seperate.
                          Preventing warps is accomplished by the lip, plywood backing prevents dips.
                          sigpic
                          See FAQ Files.
                          http://forums.iboats.com/showthread.php?t=299680

                          Get the genuine factory service manual.
                          www.outboardbooks.com
                          www.*****************

                          Comment



                          • #14
                            Re: Grady White Fuel Tank Floor Cover

                            The only way i know to test a fuel tank for leaks is to plug off all openings and attach an air fitting and a pressure guage to to ports. fill the tank with 3-5 psi, shut the air valve off and see if it hold air. If it doesnt spray a soap and water solution around the fittings first then in the areas of the tank until you find the leak. DO NOT EXCEED THE 3 TO 5 PSI LIMIT.

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                            • #15
                              Re: Grady White Fuel Tank Floor Cover

                              How did this part of the project go? I have a 85 tournament, 19' and am about to try to find out why the main tank is not working right (the after-market aux. tank is working fine).

                              Did you find out what you thought was the best way to test for leaks? Please share.

                              Are you done with the entire project?

                              Thank you.

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