[PSUBS-MAILIST] WD - 40

Wed Mar 29 19:35:23 EDT 2017

Alan,Are you back to work on your motor?   or are you still building lights?Hank 

    On Wednesday, March 29, 2017 4:44 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Thanks' Greg
Alan, my answer is who cares if some water gets between the seals.  The important part is to keep the oil inside the motor.  When the motor starts up at the surface, there is significant centrical force that pushes the oil out with the seal in its original orientation.  I should actually remove one of the seals and just have one seal holding oil in, just like a submersible well pump has.  Those pumps are VERY reliable.  Now having said all this, I could be wrong ;-)   Stay tuned for test results.Hank 

    On Wednesday, March 29, 2017 4:31 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 How are you doing that Hank?Are you compensating the gap between the two seals?Otherwise you are in the same situation as the Minn kota motorswhere one of the two seals will fail when you go beyond it's depthrating.Cheers Alan

Sent from my iPad
On 30/03/2017, at 10:40 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Greg,Good points, but I personally am not ready to give up on oil filling.  I have reversed one of the two seals in my new motors for Elementary.  One seal keeps the oil in and one seal keeps the water out.  I am confident this in addition to the compensation system will make for a clean leak proof set up.  The ice is off the lake by my house, so my test lake should be open in a week or so.  I will know then if my idea works.Hank 

    On Wednesday, March 29, 2017 7:03 AM, james cottrell via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 I have to say, I no longer think that WD40 is the best for compensating things underwater. Over time it causes plastics and rubber to harden and become brittle.Silicone oil is better but the other problem with oil compensation in general is that the smallest drop/leak makes a very visible oil slick around your sub (not good). Most guys are using trolling motors and they're not really tight enough to hold thin oil without leaks.Back in the 90s I was using air compensation- and it actually worked really well. As far as I know, Karl Stanley has also been using air compensation for a long time without problems.
It's a clean system that's not hard to set up and a small bottle of air lasts for many dives.
Greg C

      From: "MerlinSub at t-online.de via Personal_Submersibles" <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Tuesday, March 28, 2017 12:55 PM
 Subject: Re: [PSUBS-MAILIST] WD - 40

On a brushless motor it will maybe work with mineral oil. 
On motors with brushes I have bad expierence with that. Mineral oil is a big problem in a lake if a motor is even a little untight.    -----Original-Nachricht-----Betreff: Re: [PSUBS-MAILIST] WD - 40Datum: 2017-03-28T17:15:59+0200Von: "Brian Cox via Personal_Submersibles" <personal_submersibles at psubs.org>An: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>   Hi Carsten,                         I did a small test trying to light the WD40 on fire.  It's not as flammable as I thought it would be.  I think they have improved it's non-flammability with new formulation. It's still somewhat flammable however. I will be using a light mineral oil in my motors. Brian 

--- personal_submersibles at psubs.org wrote:

From: "MerlinSub at t-online.de via Personal_Submersibles" <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] WD - 40
Date: Tue, 28 Mar 2017 07:22:02 +0200 (MEST)

Heat Vapor is may a problem with WD40. May ensure that the compensating back is big to handle that.. 
We change to silicon oil for that reason.  vbr Carsten    -----Original-Nachricht-----Betreff: [PSUBS-MAILIST] WD - 40Datum: 2017-03-28T04:56:46+0200Von: "Brian Cox via Personal_Submersibles" <personal_submersibles at psubs.org>An: "PSubs" <personal_submersibles at psubs.org>   I just ran one of my motors filled with the WD40.  It seemed to be very happy.  I mainly just did it to clean the carbon build up out of the motor.  I was surprised how sealed the motor was, it is open at one end where it mates to the gear box.  I was able to fill it up without it leaking out anywhere.  That could be an issue later when I want the mineral oil to fill all the voids.  I might need to actually drill some holes to get some circulation .   Brian _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles_______________________________________________
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