[PSUBS-MAILIST] first launch.

[Alan James via Personal_Submersibles]

Rick,Look forward to hearing what went wrong.BTW I built an adjustable 2nd stage regulator with up to 8psi over pressure. It would have picked that problem up before you got in the water.I did a post on it on Psubs Facebook page,Sept 2023.Regards Alan
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  On Sun, 30 Nov 2025 at 6:48 am, Rick Patton via Personal_Submersibles<personal_submersibles at psubs.org> wrote:   I have 5 places where water could get in to the thruster so going to put it all back together and apply a positive pressure threw where the 90 degree swivel  for the air comp is and do a bubble check after confirming that the two O rings on the prop shaft are in fact in.
Rick
 
On Sat, Nov 29, 2025 at 3:27 AM Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Totally agree with James. If it leaked in 8" it's probably a forgotten or misaligned O-ring, or some such assembly issue, rather than the seals.
On Fri, Nov 28, 2025 at 11:04 PM Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Rick,I've heard that the seals in the Minn Kottas are good for 30 - 100ft. So regardless of the compensation, it shouldn't have leaked past the 2 shaft seals.Perhaps one of the large o-rings that seal the motor sections together was pinched when it was put together. I wonder if the water was coming in to the hull through the motor wiring shaft. All the best.Alan

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  On Sat, 29 Nov 2025 at 4:05 pm, Rick Patton via Personal_Submersibles<personal_submersibles at psubs.org> wrote:   The boat ramp here is in a river that runs into the ocean just 1,500  yards away so it's mostly fresh if not all. I did have the air comp on but I didn't dive it, just stayed at the dock to add weight where needed to plumb her out so with the thruster just 8" submerged  maybe the second stage reg isn't as accurate at the surface? Keep you all posted as I proceed. 
Rick
On Fri, Nov 28, 2025 at 3:11 PM Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Rick,if it's just the thruster & not the electronics you could open her up, rinse well with fresh water, dry & re-assemble. You will probably have corrosion in the wiring caused by wicking ( wire hot after operation sucks in water as it cools). You can replace the wiring but will probably get away with it seeing the wiring should be reasonably thick.Did you not have air compensation?Regards Alan

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  On Sat, 29 Nov 2025 at 11:46 am, Rick Patton via Personal_Submersibles<personal_submersibles at psubs.org> wrote:   Finally got her wet! my port thruster flooded and was wondering if anyone else had that happen and were they able to recover it? some water in the bilges which was a bit disconcerting so next time in, there will be no floorboards. _______________________________________________
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