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Old 31 August 2015, 04:55   #1
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fitting second seat to sr4 advice please

took a pal out fishing yesterday had a great day caught loads of fish. but he complained the bucket he was sitting on was uncomfortable while we were speeding out to sea. my sr4 has the standard dual seat that isn,t quite dual enough for 2 overweight friends (were not that friendly). so I'm thinking of fitting a single jockey seat behind . what I need to know is the best way of securing it to the deck I'm aware there are air chambers beneath the rear deck but unsure where or how much fiberglass is above them .I don't want to drill into one . has anyone added extra seating and how did you go about securing to the deck .thanks
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Old 31 August 2015, 05:55   #2
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I would put these in to the deck, sealed in with sika then you can take them out when not needed!
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Old 31 August 2015, 06:06   #3
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I would put these in to the deck, sealed in with sika then you can take them out when not needed!
do you mean just sikaflex the seat pod to the deck
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Old 31 August 2015, 06:39   #4
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do you mean just sikaflex the seat pod to the deck
No, drill holes to bolt seat down, sika in hole insert nut clean off exess job done.
You can then remove the seat by Unbolting when not needed
May have to seal off the bottom of the nut as they are open or be carful when putting them in not to get sika coming back up through the middle and blocking off the thread!
This is how my original Sr4 seat is fixed in to the deck so 4 bolts and its out
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Old 31 August 2015, 07:18   #5
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thanks but what happens if I drill the deck and it goes through into an air chamber. will this not affect how the flooding hull works ie I would think if I did the hull would just keep filling until water came out through my bolt holes . or am I misunderstanding how the system works
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Old 31 August 2015, 09:27   #6
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Just don't drill deeper than the thickness of the ply!
Or screw it down again screws no longer than the deck thickness and Sika too but you wont want to be getting it out in a hurry!

Have a look here post 17 shows whats under the deck

Searider rebuild project
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Old 31 August 2015, 09:42   #7
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thanks for the help I don't think it will be coming back out hopefully will be a permanent feature . any idea what the deck thickness may be ie what length self tappers to use
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Old 31 August 2015, 10:18   #8
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I have read it is 10mm ply but can not confirm, but if you use plenty of shorter screws and sika if should be fine or glass it in!
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Old 31 August 2015, 12:14   #9
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There are three methods to attach seats:

- bolts
- fibreglass
- sikka and screws

Each has its merits. Bolts let's you remove the seat if you want the space back.

Glass is pretty much indestructible.

Sikka and screws. Generally the view is the screws are just to hold while the sikka cures. Close to indestructible.

I don't know what the floor on an SR is but ply is usually in multiple of 3mm, so 10mm sounds unusual. Not sure I'd trust sikka on such a small surface area, especially a smooth polished one. So I would be looking to glass over them too, and or epoxy them in. Fill the thread with plasticine to stop adhesive getting in then pick out with cocktail stick.

How are your other seats secured...
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Old 31 August 2015, 12:31   #10
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I don't know what the floor on an SR is but ply is usually in multiple of 3mm, so 10mm sounds unusual. Not sure I'd trust sikka on such a small surface area, especially a smooth polished one. So I would be looking to glass over them too, and or epoxy them in. Fill the thread with plasticine to stop adhesive getting in then pick out with cocktail stick.

How are your other seats secured...
I would have said it was 12mm I only came up with 10mm as it has been stated on here B4, I had not heard of 10mm B4 too!
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