Reply
 
Thread Tools Search this Thread
 
Old 20 November 2012, 11:04   #1
Member
 
Country: UK - England
Boat name: ShaarkBait
Make: Zodiac 3.6 FR
Length: 3m +
Engine: Mariner 9.9 4-stroke
Join Date: Nov 2012
Posts: 364
New Zodiac Fastroller deflation - issue?

On Saturday I inflated my new Zodiac 3.6m Fastroller for the first time. It was not fully inflated, but just enough to get tubes into shape.

This morning I near fully inflated with a new Bravo BST 12 HP pump to just below the recommended pressures. Approx 11psi floor and 3psi tubes I think. Pressures were checked with the manometer supplied with the Zodiac and showed that pressures remained as expected ie approx 11/3psi.

I then left the boat for a couple of hours and on my return, I deflated it. To my surprise all the buoyancy tubes lost pressure even though all 3 main tube valves had not been fully opened. I cannot remember the exact order I deflated, but port rear tube was very deflated even though only bow and starboard rear valves had been opened.

I had not expected this as I had assumed that all compartments were independent and thus would remain fully inflated until its valve had been opened.

Is this to be expected?

Thanks

-Ian
__________________

__________________
IanH is offline   Reply With Quote
Old 20 November 2012, 11:25   #2
Member
 
Country: UK - Scotland
Town: north ayrshire
Boat name: charlie girl
Make: reiver 3.8/regal3760
Length: 10m +
Engine: 40hp 2st 2x6lp 315
Join Date: Jul 2009
Posts: 1,494
Hi That happens because although the chambers are independant if the tubes are deflated in a different order to the way they were inflated the bulkhead between each chamber can relax into the adjoining tube as there is nothing for it to push against you will probably find if you inflated the adjoining chamber it would go hard once the bulkhead was fully deflected into the fully deflated chamber

however if the first chamber re inflated as you inflated the 2nd then there is a leak in the adjoining bulkhead

hope this helps
__________________

__________________
beamishken is offline   Reply With Quote
Old 20 November 2012, 11:33   #3
Member
 
Country: UK - England
Boat name: ShaarkBait
Make: Zodiac 3.6 FR
Length: 3m +
Engine: Mariner 9.9 4-stroke
Join Date: Nov 2012
Posts: 364
Thanks.

It's all deflated now but I will test by inflating all to 50% (as per manual) then fully inflating the bow tube. Both stern tubes should then remain inflated at approx 50%?
__________________
IanH is offline   Reply With Quote
Old 20 November 2012, 11:48   #4
Member
 
Country: UK - Scotland
Town: north ayrshire
Boat name: charlie girl
Make: reiver 3.8/regal3760
Length: 10m +
Engine: 40hp 2st 2x6lp 315
Join Date: Jul 2009
Posts: 1,494
best filling tubes till they are firm not hard & see if they hold pressure then do the same with the adjoining tube untill you have done all chambers individually then you have proved each chamber
__________________
beamishken is offline   Reply With Quote
Old 20 November 2012, 14:04   #5
Member
 
Country: UK - England
Town: Hampshire
Length: 3m +
Join Date: Dec 2008
Posts: 118
I normally put 3.4 psi in tubes and 11 in floor. I inflate the floor first then the front then the sides. When I deflate I do the front first then the side tubes then the floor. The front tube is cone shaped so influences the pressure on the side tubes.
__________________
Flyguy is offline   Reply With Quote
Old 20 November 2012, 15:15   #6
Member
 
Country: UK - England
Boat name: ShaarkBait
Make: Zodiac 3.6 FR
Length: 3m +
Engine: Mariner 9.9 4-stroke
Join Date: Nov 2012
Posts: 364
I think I did it in the order you said. I only partially inflated at first as I was using the foot pump - soon realised that I needed an electric pump.

Do you do a partial inflate first - manual says 50%? I assume the floor is fully inflated first - manual implies this. Not sure what psi partial inflation is on my bravo bst pump. Probably a bit of trial and error.

Not sure if you have one but do you know if the bucket (int-l box) in the front tube is inserted before the floor is inflated or after. I put it in after I had partially inflated the floor and it was a right pita. The only thing I can see in the manual about this is that it must be inflated before the tubes are inflated.
__________________
IanH is offline   Reply With Quote
Old 20 November 2012, 15:24   #7
Member
 
falcon0310's Avatar
 
Country: UK - England
Town: surrey
Boat name: el nino
Make: tornado humber
Length: 7m +
Engine: outboards
Join Date: Jun 2009
Posts: 958
i had the smaller 285 and juile at chas newham said valves need adjusting sure the boat ok hope this helps
__________________
falcon0310 is offline   Reply With Quote
Old 20 November 2012, 15:33   #8
Member
 
Country: UK - England
Boat name: ShaarkBait
Make: Zodiac 3.6 FR
Length: 3m +
Engine: Mariner 9.9 4-stroke
Join Date: Nov 2012
Posts: 364
Sorry to sound dumb but i'm new to inflatables. What does adjust the valves mean and what will it cure ? I did have another issue where after removing the inflation tube, 2 of the 3 valves opened. Not sure if I'm using the wrong end piece adaptor - one had a plastic bar within the tube which differed from the one on the foot pump. I wonder if that had anything to do with it, like pressing in the green valve button.

Zodiac manual is erm, not very enlightening shall we say.
__________________
IanH is offline   Reply With Quote
Old 20 November 2012, 17:31   #9
Member
 
Locozodiac's Avatar
 
Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider Boats
Length: 4m +
Engine: Tohatsu 18 /30 HP
Join Date: Sep 2007
Posts: 1,706
Inflate, deflate each tube separately to at least 3.0 psi, that way will know that all bulkheads are intact and every chamber inflates and holds air properly. Best is to inflate side tubes first then bow, last is air floor. You could start inflating all 3 tubes to 1.0 psi and then add 0.5 or 1.0 more psi untill working pressure is reached. That way all tubes will be equally inflated when done.

For deflation try to open all air valves at same time, if your valves are flap diaphragm type (not spring type) unscrew them farthest away from valve without removing so to lose some pressure, once done you can remove them from main valves.

Happy Boating
__________________
Locozodiac is offline   Reply With Quote
Old 21 November 2012, 01:53   #10
Member
 
Country: UK - England
Boat name: ShaarkBait
Make: Zodiac 3.6 FR
Length: 3m +
Engine: Mariner 9.9 4-stroke
Join Date: Nov 2012
Posts: 364
Hi

Thanks for the advice but thats all the opposite of what flygy suggested which is probably what i did first time out when I started to inflate by foot pump. The manual says inflate floor first. Why do you say last?

Zodiac manual is poor. Not sure if when it says inflate tubes to 50% then 100% it means by volume or by pressure.
__________________

__________________
IanH is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 00:49.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.