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Old 16 May 2019, 13:17   #1
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Yam 360s tube pressure

What would be the tube pressure and keel pressure recommended for this sib?
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Old 17 May 2019, 02:04   #2
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I had one of these but cannot remember - great SIB's. Presuming the hardfloor then you can go a bit lighter on tubes maybe but usually 3.2 to 3.4 psi in a SIB. Keel cannot remember but someone will...
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Old 17 May 2019, 06:50   #3
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frequently asked on here i found this which might help all


https://pumpupboats.com/recommended-...latable-boats/
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Old 17 May 2019, 08:36   #4
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Thanks my Itwit pump arrives next week so no more guesswork
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Old 17 May 2019, 08:57   #5
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Originally Posted by jeffstevens763@g View Post
frequently asked on here i found this which might help all


https://pumpupboats.com/recommended-...latable-boats/
I'd just say though that the range given there for a SIB is not right at the low end for sure.
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Old 17 May 2019, 10:31   #6
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I'd just say though that the range given there for a SIB is not right at the low end for sure.
i thought about bang on my rib was 3psi my sib is 3.5 psi tubes

range 2.5-3.5 and keel 4-4.5 although i think my keel is a tad more than 4.5
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Old 17 May 2019, 10:49   #7
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Very different on a RIB to a SIB though - they can be run more like 2.5 for a softer ride as the hull gives the stiffness and strength with the tubes cushioning the ride and lower pressure makes it more supple and forgiving. Another disadvantage of a SIB in this respect!

Fenlander will be along with the keel pressure I'm sure we're all getting to old to remember these blooming figures...
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Old 17 May 2019, 11:07   #8
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Another comparison

Inflatable Boats - Recomended air pressure for inflatable boat
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Old 28 May 2019, 19:22   #9
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Sib tubes and keel are usually inflated around 3.0 to 3.5 PSI for best water performance. Reinflate after some minutes rest on water. Use a pressure gauge, finger gauge is no good...

Happy Boating
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Old 29 May 2019, 00:22   #10
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Hi


.25 for tubes and .35 bar for keel
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Old 29 May 2019, 04:37   #11
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>>>Fenlander will be along with the keel pressure I'm sure we're all getting to old to remember these blooming figures...

Faded from my mind too Max for any specific sausage keel sib other than a generic 350mbar as Dave above says. Had HP air floors for 6yrs now so floor panels and stringers are but a distant memory.
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Old 19 June 2019, 04:40   #12
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I got the tubes and keel up to proper pressure using the Itwit pump. Makes a big improvement to performance.
However for this pump but you will need an car cigarette lighter extension lead as the one on the pump is a bit short. Also you will probably need adaptors to fit the normal valves
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Old 19 June 2019, 04:56   #13
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>>>for this pump but you will need an car cigarette lighter extension lead

I've one for general use including tyre inflator pumps. I tried one from the shop and it was too thin slowing the pump down and getting hot. So I bought the cigar lighter male/female ends and made one up myself with heavier cable. It's virtually the length of the car and helps loads.

Having said that the biggest step forward re sibbing is to change your Itiwit plug for croc clips and run it from a small 7ah (min) battery and get complete freedom from the car.
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Old 19 June 2019, 07:35   #14
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I bought a heavier extension lead rated to 15a which seems to work ok for my pressures
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Old 19 June 2019, 08:47   #15
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>>> heavier extension lead

Yep... makes a big difference. With some of the cheap leads it seems as if the pump is giving up.
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