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Old 11 June 2014, 20:15   #1
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Questions for owners of FC-470 with Aluminium Floors

I recently purchased a well used aluminum floor that came off of a 1998 FC-470 and I installed it yesterday on my 2006 FC-470. It doesn't seem to fit quite right so I would like to ask you who have this set up, what 'right' is. The floor seems bit longer and narrower than it should be. It is missing panels on the bottom of the floor so the ribbing is exposed and I was told the stringers look different. The stringers have a sunburst logo, Is this Zodiac or another brand?

When I installed it according to the manual, by pushing down the center section, it just appears like it has to travel a lot before it settled. The skin of one of the floor boards buckled a fair amount and there is a crack where it has been flexing/buckling. There also seems to be a gap between the stringers and the boat (although the edge of the floor boards themselves touch the boat) as you can see in the photo.

Did Zodiac change the floor design between 1998 - 2006? Is it possible that this is not a FC-470 floor? Thoughts and comments are appreciated.
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Old 12 June 2014, 02:34   #2
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Sunburst logo is ok. Sign of Zodiac. Gap a the finger is ok too. I believe I've seen another f470 floor and it had exposed ribs at bottom of floorboards. There is no bottom skin on any of floors.. Floor-boards are snuggly fit together extrusions of specific size. Rectangular tubing or C channel type thing.
Stringers must fit snugly against boat and floor boards. Floor-board lip must be fully inserted. For example, on first picture of entire floor on right it's nice tight fit but on left there is significant gap between deck (seat) rail and edge of stringer (1/2" or so) same on picture with crack. if lip is not fully engaged floor boards will flex against each other and stringer. Quit likely causing them crack from fatigue like pictured. When installing stringers you may have too wiggle floor boards up and down to make sure stringer fits tight on the lip. I'd suggest assembling it together without boat to make sure it all fits together, there are no deformations, niks, etc
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Old 12 June 2014, 14:41   #3
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Thanks for the reassuring feedback. I just think it is weird that there is a gap between the stringers and the boat. Isn't the whole purpose of that arrangement that the boat is supposed to apply pressure to the stringers so they don't come loose?

I'm going to wiggle them in place properly and go for a test run. I mat have some aluminum reinforcement panels welded on if necessary. I was planning on sandblasting it and anodizing it but I'd like to make sure it is stable and secure first.
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Old 12 June 2014, 15:28   #4
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Well. I meant at very top there might be gap where tubes curve up and away from stringers but otherwise there should be solid contact for the most part. You should feel floor as one piece with boat.
This is how stringers should contact with floor-boards


Take it apart and put back together without one of panels (last one by transom), inflate boat and keel to proper pressure then you can easily examine fitment.
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Old 13 June 2014, 19:10   #5
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Floor boards are not fully engaged too. looks like 1/2 gap between each one. They should fit snugly making one surface. That will add 1-1.5 to length to floor putting extra stress on thrust board.
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Old 13 June 2014, 19:10   #6
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Thanks! I will take a closer look this weekend.
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Old 16 June 2014, 15:15   #7
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I'd like some input on refinishing the floor as well. I'm currently considering sand-blasting them and having them hard anodized. The other option I am considering is filling some of the numerous holes with Alumi-weld and spray painting the floor. I would just have to make sure they fit well together if painted. Any thoughts on this?
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Old 16 June 2014, 16:45   #8
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I'd have them bead blasted and then leave them as is. Paint won't work well, the slightest scuff and water will get through/under the paint and cause it to bubble then chip off. Within a year it will look shabby (like a painted scuba tank)

Hard anodizing looks and wears great but might cost you more than they are worth.
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Old 16 June 2014, 16:47   #9
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Quote:
Originally Posted by F470 View Post
I'd like some input on refinishing the floor as well. I'm currently considering sand-blasting them and having them hard anodized. The other option I am considering is filling some of the numerous holes with Alumi-weld and spray painting the floor. I would just have to make sure they fit well together if painted. Any thoughts on this?
IMHO doing this would be more trouble than it's worth. To do properly you would have to take every panel apart not just side rails but entire floorboard. I'd rather just paint it.
I think better alternative is something like this (comes in black too) SeaDek
Makes it quieter, more pleasant to stand on. Will hide those holes as well. There are other decking options too.

How's floor fitment?
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Old 16 June 2014, 16:56   #10
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I have this stuff on my Ali floor
Buffalo Tools 3 ft. x 5 ft. Anti-Fatigue Rubber Mat Flat-RMAT35 at The Home Depot
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