fixing in seats

Kaz · 09 July 2018, 23:15

Hi all,

I'm after some advice about fixing seats into my rib. It's a 4 metre avon searider with a double jockey seat. I want to fix another seat in the back but am not sure how to fix the seat to the floor. Any advice on the type of seat and hoe to fix it in would be greatly appreciated?

It will be used to carry passengers and as a fishing seat. I dont want a bench seat unless it has a back to it for comfort.

Thanks.

Kaz

Nos4r2 · 09 July 2018, 23:29

There's not a lot of room in an SR4 for another jockey, you might be stuck with a bench.
At least the underside of a bench gives you storage room.

Sikaflex 291i and stainless self-tappers for fitting,or you could glass it in if you're feeling confident.

Kaz · 09 July 2018, 23:38

Agreed, I measured 40mm between engine and jockey including leaving a bit of room and wondered whether i could get a single captains seat in that swivels but wasn't sure how to fix it? If i used self tappers would this not cause a potential leak. Forgive my lack of knowledge but I am new to boat owning so learning as I go. :-)

Iron Dials · 10 July 2018, 00:01

FWIW I bought my used rib from the manufacturer and wanted more seating.
They said "sikaflex and self tappers" is where it's at now.
If it was new from factory, they would be glassed in.
So, if done correctly either is fine as a method of installation.
(I went for the OEM spec and had them glassed)

The under-seat storage is great but we've yet to fill every seat so measure need against expectation with a cold anti-social eye

Nos4r2 · 10 July 2018, 00:07

A swivel captains seat will likely break the deck (and if it doesn't it'll be unstable) -it's quite thin on an sr4.

Sikaflex 291i is a polyurethane flexible marine sealant.Screw the new seat base down onto a bed of sikaflex. It'll squeeze into every available gap as the screws tighten. (masking off where the base will go with WIDE masking tape will help as well, Sikaflex goes a long way)
it's a very very strong way of fitting a console.

Iron Dials · 10 July 2018, 00:19

At the risk of showing my ignorance of SeaRiders..although I expect to remedy this very soon........
Would you be better off putting the additional passenger sitting on the tube? Not ideal, but lots if sailing clubs manage quite well.
To me Ribs, below a critically expensive length, are one directional. You face forward in the seat. Everything else is a battle between your ankles/knees and the boat.
Cluttering the deck space with an additional seat may frustrate you when fishing when you want to move about.

Kaz · 10 July 2018, 01:02

Quote:

Originally Posted by Nos4r2

A swivel captains seat will likely break the deck (and if it doesn't it'll be unstable) -it's quite thin on an sr4.

Sikaflex 291i is a polyurethane flexible marine sealant.Screw the new seat base down onto a bed of sikaflex. It'll squeeze into every available gap as the screws tighten. (masking off where the base will go with WIDE masking tape will help as well, Sikaflex goes a long way)
it's a very very strong way of fitting a console.

Ahh thanks that has helped me to understasnd. So i use the sikaflex to create a false floor which i position the seat on and use the self tappers to fix the seat to the sikaflex which will harden and secure it. That sounds like my best option, thank you.

Kaz · 10 July 2018, 01:08

Quote:

Originally Posted by Iron Dials

At the risk of showing my ignorance of SeaRiders..although I expect to remedy this very soon........
Would you be better off putting the additional passenger sitting on the tube? Not ideal, but lots if sailing clubs manage quite well.
To me Ribs, below a critically expensive length, are one directional. You face forward in the seat. Everything else is a battle between your ankles/knees and the boat.
Cluttering the deck space with an additional seat may frustrate you when fishing when you want to move about.

Thanks for your reply. I will mainly be using the boat to take friends out for some fun, some are a little nervous and would feel safer sat in the boat as apposed to on the tubes. I will also be taking my dad out on a couple of fishing trips.

jeffstevens763@g · 10 July 2018, 09:50

have you thought of an inflatable seat pack it away when not in use

https://shop.chastheboat.co.uk/colle...nt=10589327495

GuyC · 10 July 2018, 13:59

Just on the Sikaflex.

291i is a multi-purpose sealant and adhesive. If you are really trying to glue them down, 292i is a better bet but the key to successful bonding using either of these products is decent preparation.

IainK · 10 July 2018, 21:00

Hi Kaz,
You need to watch the rear section of the Searider floor as it thins down in the last 300mm from the transom to one layer of plywood: if you look and or feel up through the rear drain outlet of the hull you will see what I mean. Better use jeffs' idea and use an inflatable seat but in front of the jockey unit - that way you will see they are OK. Best wishes iain

Poly · 11 July 2018, 17:06

Quote:

Originally Posted by Kaz

Ahh thanks that has helped me to understasnd. So i use the sikaflex to create a false floor which i position the seat on and use the self tappers to fix the seat to the sikaflex which will harden and secure it. That sounds like my best option, thank you.

No. Unless I am reading it wrong.
You will apply sikaflex to the floor (or seat base) and then screw the base to the deck which compresses the still wet sika. It is a very good adhesive as well as sealant so glues the seat and seals any gap. It is very important you use a proper marine adhesive for this and not just some bathroom sealer. https://www.pbo.co.uk/news/maib-repo...ck-seats-12819

A1an · 11 July 2018, 21:41

To give you an idea of the strength of Sikaflex..I was removing a console that was held in place with self tappers and Sikaflex, I removed all the self tappers and placed a strop through the console to lift it out with a tractor. I lifted the WHOLE boat up off the trailer when trying to lift console.

I had to cut it out in the end.

GuyC · 11 July 2018, 22:10

To give you the opposite story - I know someone who glued down all the bearers for a floating floor in the wheelhouse of a boat. When everything dried, you could just peel off the bearers and the Sikaflex. There was apparently insufficient time to prepare the substrate although it turned out that there was sufficient time to do it twice!

jeffstevens763@g · 12 July 2018, 08:27

Quote:

Originally Posted by A1an

To give you an idea of the strength of Sikaflex..I was removing a console that was held in place with self tappers and Sikaflex, I removed all the self tappers and placed a strop through the console to lift it out with a tractor. I lifted the WHOLE boat up off the trailer when trying to lift console.

I had to cut it out in the end.

+1 although i didnt have a tractor to hand i cut it with a multi tool then used hardwood wedges to crack the seal and thats a joint between a fiberglass jockey seat and a flow coated floor.replaced with shock seats on aluminum bases stuck down the same way with no probs.