Home Forum Ask A Member Filling holes after pulling out dents in aluminium tank.

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  • #289667
    Monte NZ
    Participant

      International Member

      Hi All

      What heat range of aluminium solder should I use on the above?……..I’m very conscious of not wanting to melt the tank.

      These holes are as result of using a slide puller with self tapping screw.

      Thanks in advance for any help.

      Monte NZ

      #289674
      The Boat House
      Participant

        My only experience is with the aluminum brazing rods. I would have tiny leaks and re-melting the repair might get rid of one only to create another. Searching, I found an “Aluminum Soldering Kit”. Ordered one to try. Be interested in your results. My thoughts would be that you would want to use the lowest temp possible as the aluminum expands so much, distorting the tank, assuming a torch is required.   Tubs
        #289676
        joecb
        Participant

          US Member

          I don’t know what might be available down in NZ, but here we have this readily available aluminum brazing rod that requires no flux and is composed mostly of zinc. It is commonly called ” beer can rod” because it is often demonstrated at shows being used to braze two beer cans together. It’s melting temp is considerably below that of alum, my guess , about 700 *F. I have used it for several repairs, applied to a properly prepared joint it makes a very strong repair. The down side… it’s zinc not aluminum, the color is much darker that AL after it ages, also it’s much harder than Al, so finishing it off on a flush surface can be a challenge. Proper application requires through cleaning of the parent metal to ensure the first wet “tinning” application is complete. Once you learn how to use its pretty amazing stuff. Oh, propane or MAPP torch for must small repairs, the parts to be repaired have to be brought up to melting temp of the rod, the rod must be scrubbed onto the parent metal to ensure complete “tinning” of the surface,,, you can’t just lay it on.

          Joe B

          #289685
          Monte NZ
          Participant

            International Member

            Thanks very much Tubs and  Joe B for your very helpful advice.

            The lowest temp makes a lot of sense……I will check out what is available  down here.

            I had forgotten the demo of welding beer cans……very effective if I remember correctly.

            I will be painting the tank so the colour of the material isn’t a problem.

            I will report back on progress and thanks once again for your much appreciated help.

            Monte NZ

            #289699
            The Boat House
            Participant

              I have a like – hate relationship with the aluminum brazing rod. I’m getting better but I still struggle. I’ve done several prop repairs. I made a lamp out of some junk Pal parts for a friend. The skag doesn’t look just right but its good enough for a lamp. The prop is on a Super 10 I did five years ago. I would think there is a fair amount of stress at the end of the prop. I ran almost 60 gal. of fuel through the motor that summer and then gave the motor to a friend. He doesn’t run it as much as I did but it still gets used a fair amount. I checked this year and it still on there. I did the hole in the gas tank twice. It came out OK but it leaked. I just used a sealer in the tank. When its polished out it wont show at all looking from one direction but it will from another. Decal covers most of it. Tubs

              #289711
              crosbyman
              Participant

                Canada Member - 2 Years

                if you were more humble  you would thumble 🙂

                 

                great looking job

                 

                they wanted 300$ for fix  clipped skeg on my  75  ETEC … I went cheap with JB weld and  Evinrude paint

                 

                holds up fine

                Joining AOMCI has priviledges 🙂

                #289734
                The Boat House
                Participant

                  if you were more humble  you would thumble 🙂

                   

                  great looking job

                   

                  they wanted 300$ for fix  clipped skeg on my  75  ETEC … I went cheap with JB weld and  Evinrude paint

                   

                  holds up fine

                    While I do have some successful outcomes more often its an “Almost Worked”. Especially if its where its going to show. I use much more JB Weld than this brazing rod and its usually with good result. Tubs

                  #289741
                  bob-d
                  Participant

                    US Member

                    Tubs, amazing work…..as usual.
                    How was your Maine trip? I got wiped out again in upstate NY with all the rain.
                    Two years in a row.
                    Bob D

                    #289742
                    The Boat House
                    Participant
                      #289762
                      Monte NZ
                      Participant

                        International Member

                        Thanks Tubs and crosbyman for your replies and as usual Tubs, your photos are great…..big help!

                        You have certainly made a lovely job Tubs. That’s an interesting photo of the skeg repair with JB Weld crosbyman. I don’t blame you for balking at a charge of $300………that would be over $450 in NZ dollars……..phew!!!!

                        Last year I did a replacement gearbox and skeg with JB Weld on an Evinrude Scout……I reinforced it using thin stainless steel strips taken from an old windscreen wiper blade and finished it off with bog……looks perfect…….I will try to hunt out some shots…….might help someone with a similar problem.

                        Today I did my first soldering repair on the tank, which was an interesting experience. My  neighbour very kindly produced a couple of solder rods. I cleaned the tank thoroughly and am pleased to report success…..not the most beautiful job, but the holes look to be well and truly sealed. …….I counter sunk the holes to help get a good take……next will be the filler.

                        https://photos.app.goo.gl/yRnUC38NaDKLPeWK6

                        Thanks very much once again for your help.

                        Monte NZ.

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