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<DIV>Tom, </DIV>
<DIV>Been using Castor Oil as an after run oil and in my fuel (mix of syn and castor) for a very long time. Works great and I have no issues with varnish or any adverse affects. Until recently, I stored my stuff in the garage in hot and humid Florida. In general bearings in my Webras last about 400 runs or so before they need replacement. </DIV>
<DIV> </DIV>
<DIV>The only "premature" failure so far has been the 160's bearing (lasted longer than "50-100" though), and which was primarily caused by lean idle and mid range settings. There were also other circumstances that didn't help the bearing (about 8 month idle time between Florida and New Jersey)</DIV>
<DIV> </DIV>
<DIV>I agree it probably isn't as simple as what was stated, but Ed's point is that OS has a winner with the EFI bearing, so why not use that part from the start at the factory? Makes sense to me.</DIV>
<DIV> </DIV>
<DIV>MattK</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>In a message dated 7/2/2006 11:50:32 PM Eastern Standard Time, Tom.Koenig@actewagl.com.au writes:</DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid">
<DIV><SPAN class=187332903-03072006><FONT size=2>Hi Guys,</FONT></SPAN></DIV>
<DIV><SPAN class=187332903-03072006><FONT size=2>Please dont take this the wrong way and I dont want to rain on your parade-but...</FONT></SPAN></DIV>
<DIV><SPAN class=187332903-03072006></SPAN><FONT size=2></FONT> </DIV>
<DIV><SPAN class=187332903-03072006><FONT size=2>I dont think it's as simple as what you say. May I ask why you are pouring castor oil in there? ( OK I know why..but...)</FONT></SPAN></DIV>
<DIV><SPAN class=187332903-03072006><FONT size=2>I have seen/experienced symptoms like you describe-but generally in motors where the set-up parameters may not be optimal. Ie; pipe too short and prop too big and no crankcase cooling, wronfg fuel and compression ratio.</FONT></SPAN></DIV>
<DIV><SPAN class=187332903-03072006></SPAN><FONT size=2></FONT> </DIV>
<DIV><SPAN class=187332903-03072006><FONT size=2>No crankcase cooling can cause the pump to get too hot and boil fuel. This shows up as all sorts of symptoms and genarally causes havoc. Also, if that engine is getting too hot whatever castor you have left in there will burn, perhaps causing a varnish build up and the rest is history.</FONT></SPAN></DIV>
<DIV><SPAN class=187332903-03072006></SPAN><FONT size=2></FONT> </DIV>
<DIV><SPAN class=187332903-03072006><FONT size=2>However all bearings will wear and the big 2 strokes usually let you know when the idle suddenly turns to custard. Then you must immediately change bearings.</FONT></SPAN></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>C<SPAN class=187332903-03072006>heck over all possibilities-the Japaneses usually know what they are doing ( and if they dont-they'll never admit anyway) but down here, all the OS's run perfectly once the set-ups are correct.Having said that -expect to change bearings every 50-100 flights depending on climatic conditions.</SPAN></FONT></DIV>
<DIV><SPAN class=187332903-03072006></SPAN><FONT size=2></FONT> </DIV>
<DIV><SPAN class=187332903-03072006><FONT size=2>Ofcourse I place a caveat on this- I use a YS <VBG></FONT></SPAN></DIV>
<DIV><SPAN class=187332903-03072006></SPAN><FONT size=2></FONT> </DIV>
<DIV><SPAN class=187332903-03072006><FONT size=2>Good luck and best regards</FONT></SPAN></DIV>
<DIV><SPAN class=187332903-03072006></SPAN><FONT size=2></FONT> </DIV>
<DIV><SPAN class=187332903-03072006><FONT size=2>Tom</FONT></SPAN></DIV>
<DIV><SPAN class=187332903-03072006></SPAN><FONT size=2></FONT> </DIV>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> nsrca-discussion-bounces@lists.nsrca.org [mailto:nsrca-discussion-bounces@lists.nsrca.org]<B>On Behalf Of </B>R. LIPRIE<BR><B>Sent:</B> Monday, 3 July 2006 1:21 PM<BR><B>To:</B> NSRCA Mailing List<BR><B>Subject:</B> Re: [NSRCA-discussion] Bearing tip for OS 1.40 RX<BR><BR></FONT></DIV>
<DIV><FONT size=2>You no Ed,</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2> You are as right as anyone could be. OS is a very good engine without that dang piece of junk ball bearing. And I I've made complaints and I no I'm not the only one that has. But I don't no why they keep putting that thing in there. They do no what that bearing does. But like I told them you would get better sells of your engines if you would put the good ball bearing in there. Because everyone is starting to find out that the OS ball bearing that is stock is junk. So everyone just keep complaining.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV align=center><FONT size=2>Matt</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=mailto:ed_alt@hotmail.com href="mailto:ed_alt@hotmail.com">Ed Alt</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=mailto:nsrca-discussion@lists.nsrca.org href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, July 02, 2006 10:09 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] Bearing tip for OS 1.40 RX</DIV>
<DIV><FONT size=2><BR></FONT></DIV>
<DIV><FONT size=2>This is an FYI for anyone with a new OS 1.40 RX. Thinking about running with the stock bearing for even a short time? Think again. I was anxious to get a new model flying for this weekend and decided not to take the time to first swap out the junk stock bearing in a new RX. I figured if I dosed it with after run oil after every flight I could get through he weekend and then do the mandatory swap to a sealed bearing. Here's the full history. </FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Friday, June 30 I did two break in runs on the ground. Didn't do any after run between these two runs. They were only 30 minutes apart. What could happen?. Another 30 minutes after the 2nd break in run, did a short flight. Had a transmitter trim lever problem, landed quickly, de-fueled, ran it dry, literally ran nearly 20 squirts of Amsoil Metal Protector through it. Doused it. Got it home, added a full carb barrel of castor oil for good measure and worked it through. Yeah, that ought to do it. Dehumidifier running all day, all night in the basement...</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Saturday, July 1 dawns. Bearings still feel OK. Head to the field. Fly. Work a carb barrel of castor through it. Repeat for 3 more flights. Note that the bearing is starting to feel rough already. Take it home, swap for a sealed bearing. Note that the bearing is rusted already and that the crankshaft has light scoring from the inner race turning on it. 7 runs, handled like a newborn baby.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>IMO, it is a disgrace that OS continues to produce this engine with a trash bearing that can't stand up to even the most careful use for more than a day. They KNOW what should be in there, since they do it for the EFI version. Lesson learned, if I ever do use another new RX, I'll never again make the mistake of doing even a single run without first swapping the main bearing. It's not like the sealed bearing is all that expensive either. I get them locally for a little over $11 each and they work great. You don't even have to waste money on an overpriced Boca or EFI verson from Tower.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Ed</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></DIV>
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