Drowned Inon Z240 - anything worth salvaging?

I've got one of these kits and have split the extenders between two strobes for the power adjustment on both. I may get a second kit eventually.

So, what's your experience with the backup O-ring? Have you had any failed original O-ring where the backup has saved you? Do you see any downsides?

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Typos are a feature, not a bug

Well, like many apparently, I had an issue where I got the original o-ring outside of the channel and sliced it as I turned it down. I noticed right when I got in the water. AFTER that, I got this kit. I've not had a chance to test the 2nd o-ring, fortunately.

I will say that it makes getting the battery cap on more difficult. It probably takes one turn out of the tightening, but it takes a lot more elbow grease to get the cap on and off because the compression of the o-ring is pushing the threads together.

Storker,

unfortunately I do not have a proper ruler to measure the o-ring, but is has been said it is "size 130" - whatever this means (does not help much if I tell you it is "approximately 3mm*47mm" or so...). I bought the o-ring without the knob extensions on a dive show; I remember the dimsions were NOT imprinted on the package - no wonder, they sold it with some 1000% margin!

So I am not the only one who managed to flood an Inon due to a twisted o-ring. Since I use the second o-ring I did not have any problems, but I triple check the main o-ring.

Do you still have your drowned Inon? If so, maybe you are the one who could test the reliability of the second o-ring: Remove the yellow main o-ring and use the second o-ring alone on a deep and a shallow dive. Then check the battery compartment. Would be nice to hear your results! But also feel free to do that with your new Inon - no risk, no fun!

Regards, Jock

http://www.grainger.com/product/GRAINGER-APPROVED-O-Ring-1KGL9gives you the exact dimensions.

maybe you are the one who could test the reliability of the second o-ring: Remove the yellow main o-ring and use the second o-ring alone on a deep and a shallow dive. Then check the battery compartment.

I don't feel any need for those knob extenders, despite using either 5mm gloves or drygloves, so some 20€ is a bit much for an O-ring. But I'll look around for a suitable O-ring at a decent price, and if I find one I'll do that experiment.

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Typos are a feature, not a bug

Does anyone know if there is a difference putting in the yellow inon o-ring and not the h20, the inon fits fine.

Go ahead and test...

Seriously, I think the yellow o-ring is way too thick. It may fit into the outer cap, but if you look at the space it has to seal at the strobe - "inner" battery cap (with the contacts) to the strobe compartment - it will not fit. And with the much thinner H2O o-ring the cap can be screwed down just neough to give a seal with the yellow o-ring. If you put a thicker o-ring into the cap you may loose this seal.

I have packs of 4 back up O rings for sale in the classified forum if anyone is interested.

Mark

A bit delayed, I did a partial post mortem today. Shows that the most obvious cause of death isn't necessarily the correct one.

I wasn't able to get the electronics out of the housing, but at least I removed the front glass. Which was cracked, but in such a way that it wasn't visible before I took off the rubber thingy around its edge.

I'pretty certain the strobe didn't get any whacks on that particular trip, but I have to admit that such things have happened before.

So the new hypothesis is that a small crack in the front glass has grown slowly - like cracks like to do - and on that day it had grown enough to spring a leak. So the water entered the battery chamber from the inside and shorted the batteries, and since the gas couldn't escape quickly enough through the strobe body, it extruded the O-ring from the inside. And the latter fits with the shape of the O-ring when I dicovered the leak.

At least I feel less of a fool now, so post-mortems are able to bring some kind of closure to those who witness a fatality...

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Typos are a feature, not a bug

Delete, please.