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<DIV>I (and many others in the northeast) have been using S&W w/ 2% Castor and 17% synthetic (Klotz) in all engines for close to 20 years - YS 2C and 4C, OS 2C and 4C, Webra 2C, ST 2C. And for the majority of that time, running dry at the end of the day, and lubing w/ Mobil 1 synthetic or Amsoil MP.</DIV>
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<DIV>Never a problem with diaphragms, pumps, or varnish buildup. After a long period of rest, there is occasionally some added drag on the bearings, or (apparently) a little bit of build up in the pump/fuel supply requiring a richer needed for a couple minutes. Bearing life and general corrosion/coloration in the engines is definitely better using the 2% castor.</DIV>
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<DIV>Like Matt K said....find something that works and stick with it.</DIV>
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<DIV>Dave</DIV>
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<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR>From: vicenterc@comcast.net <BR>
<DIV>What is the effect of castor oil on the pump diafragm? I understood that we can not use Castor oil in YS because of the diaframs and regulators parts. I am not sure now if castor oil couls cause similar problems in OS 140 RX pump and the and the Perry pump. </DIV>
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<DIV>VB</DIV>
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<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR>From: Ron Van Putte <vanputte@cox.net> <BR><BR>> <BR>> On Dec 17, 2006, at 9:47 PM, Zoro1024@aol.com wrote: <BR>> <BR>> > I think you may be correct Wayne, I wouldn't run castor in a YS, <BR>> > but wouldn't run the OS without it. <BR>> <BR>> I've been running an OS 1.40RX for two seasons and never use castor <BR>> oil. However, castor oil vs synthetic oil is like religion: you <BR>> don't question the other's preference. <BR>> <BR>> Ron Van Putte <BR>> <BR>> _______________________________________________ <BR>> NSRCA-discussion mailing list <BR>> NSRCA-discussion@lists.nsrca.org <BR>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion </BLOCKQUOTE></BLOCKQUOTE></body></html>