loose jockey seat

[ciaranp]

One the of double jockey seats on my rib is loose and moving.
It was never bolted down.

Is there resin or whats the easiest way of securing to the deck without drilling and bolting?

[BruceB]

Generally Humber fittings are screwed and glued to the deck. Stainless screws go through the lip round the seat with sikafix or similiar all around the flange to seal and hold the seat on.
What like is the deck underneath the seat? There is no way under the deck to bolt through in any case unless you start putting hatches in.........

[ciaranp]

Originally Posted by BruceB

Generally Humber fittings are screwed and glued to the deck. Stainless screws go through the lip round the seat with sikafix or similiar all around the flange to seal and hold the seat on.
What like is the deck underneath the seat? There is no way under the deck to bolt through in any case unless you start putting hatches in.........

The jockey in front has screws through the lip or edge of jockey to screw it to deck.
i will get self tapping stainless screw.any idea the size these screws should be or best size?

[PeterR]

Why not remove one out of the other seat to attain the correct size.When fitting the new ones yo will need to pillot drill the deck and drill the seat flang the size of the shank/screw

[Ian M]

Have you spoken to Humber about this? It really should not happen, it is a potential killer.
There was a thread on here recently about seat pods on a RIB becoming detached and ejecting the crew into the Thames! MAIB report - RIBQUEST owners

[ciaranp]

I'm thinking about drilling a small pilot hole and using a few 1 1/4" Stainless self tappers (contcted humber and thats what they use )and washers on the flange and then sealing off the screw holes and around the jockey with silicone.
I have sikaflex also but just in case i ever decide to move the seat i decided not to use it.

There is enough holes in the flange of the jockey for 10 + self tappers.

Will this method hold it?

[Cypman]

Put silicone into each screw hole and all along the undrneath of the flange before positining and screwing down. Don't drill your pilot holes too small or you will crack and split the fibreglass gel-coat; though not too big or the screws won't hold!!! Regarding how many to use, I consider for a secure fix you need to space the screws circa 10cm to 15cm apart.

[ciaranp]

Originally Posted by Cypman

Put silicone into each screw hole and all along the undrneath of the flange before positining and screwing down. Don't drill your pilot holes too small or you will crack and split the fibreglass gel-coat; though not too big or the screws won't hold!!! Regarding how many to use, I consider for a secure fix you need to space the screws circa 10cm to 15cm apart.

What size hole or drill size would you recommened for the 1 1/4" self tappers?
Theres loads of holes for the screws the whole way round the flange so maybe screw every 2nd one.

I was onto humber today and they said silicone with the screws wasn't enough ,they said to use sikaflex. Don't know what to do now wheather to use sikaflex or not? If i ever want to move the seat sikaflex will be a problem to get off.

If i use sikaflex what is the correct way to apply?
1. add sikaflex to the deck right around and then sit the flange and jockey down on it, then drill pilot holes put a bit of sikaflex in holes and screw in tappers.
or
2. add sikaflex to the bottom of jockey flange all way around then place jockey down on deck, drill pilot holes, screw in.

do you add sikaflex the whole way around or just in cornors or patches?

[PeterR]

I would suggest the holes through the jockey seat need to be large enough for the screw to fit into neatly to find this size drill into another bit of waist ali or wood.The pilot hole needs to be slightly smaller than the thread but large than the core or shank.Do one hole and see if you can screw it in with out it getting to tight.You need to clean the surfaces thougherly and bond the seat to the deck then drill your holes and screw down the seat and clean off extra stikflex.

[PeterR]

Add stikaflex all the way round to the deck using the marks you put before you removed the seat to clean the bottom edge/flang