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<DIV>Lance,</DIV>
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<DIV>Now you said that, I think I have that problem with an OS 160 that I replaced the bearings not long ago. The engine never wanted to run like the others and as before after replacing the bearing. I bet that I didn't align the ring with the pin. </DIV>
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<DIV>Thanks for the "eye opener"</DIV>
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<DIV>Vicente Bortone</DIV>
<DIV> </DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR><BR>> You might also make sure the ring is properly located on the piston. Some <BR>> pins in the piston are shorter than others and actually allow assembly with <BR>> th ering rotated <BR>> --Lance <BR>> <BR>> ----- Original Message ----- <BR>> From: "Mortons" <JRMMORTON@EARTHLINK.NET><BR>> To: <DISCUSSION@NSRCA.ORG><BR>> Sent: Sunday, August 28, 2005 5:41 PM <BR>> Subject: Re: OS140 RX - Problem <BR>> <BR>> <BR>> > Amran, <BR>> > <BR>> > Something similar happened to mine (at a contest no less) and some of the <BR>> > nickel plating on the cylinder liner had flaked off at the exhaust port. I <BR>> > replaced the piston and cylinder with a Performance Specialties AAC and <BR>> > have had no problems since (and a bit more power too). Please look at your <BR>> > piston and sleeve. <BR>> > <BR>> > Ray <BR>> > <BR>> > Amram Private wrote: <BR>> > <BR>> >>Hello to all. <BR>> >>The story is about OS140RX with OS header, ES CF tune pipe, fuel 20% <BR>> >>Nitro 16% oil. <BR>> >>Engine gained 28 hours with no problems whatsoever. Time has come to <BR>> >>replace the bearings as I stared to notice some freedom. I was able to <BR>> >>get the FAI bearings set on Thursday so before changing the bearings I <BR>> >>decided to go for few <BR>> >>more flight on Friday and then to change. On Friday at field, I was <BR>> >>able to start the motor normally. While on Idle when I was ready to lift <BR>> >>the model and take it <BR>> >>to the runway, the motor stopped. This was strange as it used to hold <BR>> >>very steady idle. Since then I could not start the motor. The motor <BR>> >>seems to be with low compression. Today I opened the motor and changed <BR>> >>the
bearings. All motor internal parts seems to OK and clean with no <BR>> >>special dirt or signs. Still the motor does not start and still the <BR>> >>feeling is of low compression. Is looks like the motor "Wants" to start <BR>> >>but not enough power. Fuel supply is OK as when I prime, fuel comes out <BR>> >>on the carb. (Motor is upside down). Plug is completely new (Type F), <BR>> >>Booster is OK ProDiver Mark III - Radio South (Same problem when I tried <BR>> >>a normal booster). The motor build-in fuel pump never been touched. <BR>> >> <BR>> >>Any Ideas? <BR>> >> <BR>> >>Thanks in advance to all helpers <BR>> >>Amram Leshed <BR>> >> <BR>> >>================================================= <BR>> >>To access the email archives for this list, go to <BR>> >>http://lists.f3a.us/pipermail/nsrca-discussion/ <BR>> >>To be removed from this list, go to http://www.nsrca.org/discussionA.htm <BR>> >>and follow the instructions. <BR>> >> <BR>> >>List members email returned for mailbox full will be removed from the <BR>> >>list. <BR>> >> <BR>> >> <BR>> >> <BR>> >> <BR>> > <BR>> > ================================================= <BR>> > To access the email archives for this list, go to <BR>> > http://lists.f3a.us/pipermail/nsrca-discussion/ <BR>> > To be removed from this list, go to http://www.nsrca.org/discussionA.htm <BR>> > and follow the instructions. <BR>> > <BR>> > List members email returned for mailbox full will be removed from the <BR>> > list. <BR>> > <BR>> <BR>> ================================================= <BR>> To access the email archives for this list, go to <BR>> http://lists.f3a.us/pipermail/nsrca-discussion/ <BR>> To be removed from this list, go to http://www.nsrca.org/discussionA.htm <BR>> and follow the ins
tructions. <BR>> <BR>> List members email returned for mailbox full will be removed from the list. <BR>> </BLOCKQUOTE></body></html>