<html><head></head><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:13px"><div id="yui_3_16_0_1_1490790963881_4935" dir="ltr">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.</div><div id="yui_3_16_0_1_1490790963881_4935" dir="ltr">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.</div><div id="yui_3_16_0_1_1490790963881_4935" dir="ltr">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.<br></div><div id="yui_3_16_0_1_1490790963881_4935" dir="ltr">It's a clean system that's not hard to set up and a small bottle of air lasts for many dives.</div><div id="yui_3_16_0_1_1490790963881_4935" dir="ltr"><br></div><div id="yui_3_16_0_1_1490790963881_4935" dir="ltr">Greg C</div><div id="yui_3_16_0_1_1490790963881_4935" dir="ltr"><br></div><div class="qtdSeparateBR" id="yui_3_16_0_1_1490790963881_5027"><br></div><div class="yahoo_quoted" id="yui_3_16_0_1_1490790963881_5033" style="display: block;"> <div style="font-family: verdana, helvetica, sans-serif; font-size: 13px;" id="yui_3_16_0_1_1490790963881_5032"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1490790963881_5031"> <div dir="ltr" id="yui_3_16_0_1_1490790963881_5030"> <font size="2" face="Arial" id="yui_3_16_0_1_1490790963881_5029"> <hr size="1" id="yui_3_16_0_1_1490790963881_5028"> <b id="yui_3_16_0_1_1490790963881_5066"><span style="font-weight:bold;" id="yui_3_16_0_1_1490790963881_5065">From:</span></b> "MerlinSub@t-online.de via Personal_Submersibles" <personal_submersibles@psubs.org><br> <b id="yui_3_16_0_1_1490790963881_5064"><span style="font-weight: bold;" id="yui_3_16_0_1_1490790963881_5063">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b id="yui_3_16_0_1_1490790963881_5062"><span style="font-weight: bold;" id="yui_3_16_0_1_1490790963881_5061">Sent:</span></b> Tuesday, March 28, 2017 12:55 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] WD - 40<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1490790963881_5571"><br><div id="yiv1742601455"><title></title><div id="yui_3_16_0_1_1490790963881_5573"><div style="margin:0px;" id="yui_3_16_0_1_1490790963881_5572"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">On a brushless motor it will maybe work with mineral oil. <br clear="none"></span></div>
<div style="margin:0px;" id="yui_3_16_0_1_1490790963881_5574"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">On motors with brushes I have bad expierence with that. </span></div>
<div style="margin:0px;" id="yui_3_16_0_1_1490790963881_5575"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">Mineral oil is a big problem in a lake if a motor is even a little untight. </span></div>
<div style="margin:0px;" id="yui_3_16_0_1_1490790963881_5576"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;"> </span></div>
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<div style="margin:0px;" id="yui_3_16_0_1_1490790963881_5825">-----Original-Nachricht-----</div>
<div style="margin:0px;">Betreff: Re: [PSUBS-MAILIST] WD - 40</div>
<div style="margin:0px;" id="yui_3_16_0_1_1490790963881_5826">Datum: 2017-03-28T17:15:59+0200</div>
<div class="yiv1742601455yqt4913856864" id="yiv1742601455yqtfd68998"><div style="margin:0px;" id="yui_3_16_0_1_1490790963881_5827">Von: "Brian Cox via Personal_Submersibles" <personal_submersibles@psubs.org></div>
<div style="margin:0px;">An: "Personal Submersibles General Discussion" <personal_submersibles@psubs.org></div>
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<div id="yui_3_16_0_1_1490790963881_5830">Hi Carsten, </div>
<div id="yui_3_16_0_1_1490790963881_5833"> 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. </div>
<div>I will be using a light mineral oil in my motors.</div>
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<div id="yui_3_16_0_1_1490790963881_5835">Brian</div>
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<div id="yui_3_16_0_1_1490790963881_5837"><br clear="none"><br clear="none">--- personal_submersibles@psubs.org wrote:<br clear="none"><br clear="none">From: "MerlinSub@t-online.de via Personal_Submersibles" <personal_submersibles@psubs.org><br clear="none">To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><br clear="none">Subject: Re: [PSUBS-MAILIST] WD - 40<br clear="none">Date: Tue, 28 Mar 2017 07:22:02 +0200 (MEST)<br clear="none"><br clear="none"></div>
<div style="margin:0px;"><span style="color:#000000;font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;">Heat Vapor is may a problem with WD40. </span></div>
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<div style="margin:0px;"><span style="color:#000000;font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;">May ensure that the compensating back is big to handle that.. <br clear="none"></span></div>
<div style="margin:0px;"><span style="color:#000000;font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;">We change to silicon oil for that reason. </span></div>
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<div style="margin:0px;"><span style="color:#000000;font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;">vbr Carsten </span></div>
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<div style="margin:0px;">-----Original-Nachricht-----</div>
<div style="margin:0px;">Betreff: [PSUBS-MAILIST] WD - 40</div>
<div style="margin:0px;">Datum: 2017-03-28T04:56:46+0200</div>
<div style="margin:0px;">Von: "Brian Cox via Personal_Submersibles" <personal_submersibles@psubs.org></div>
<div style="margin:0px;">An: "PSubs" <personal_submersibles@psubs.org></div>
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<div>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 . </div>
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<div>Brian </div>
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