<DIV>Hmmmm . . . . . . you have put all the right parts in and assuming the rest of the engine is sound. . . . . my guess is an air leak. The low end needle on my conversions is usually about 3/4 turn out from closed. Did you replace the gaskets?<BR><BR><B><I>Ed White <edvwhite@yahoo.com></I></B> wrote:
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Folks,<BR><BR>I need some advice. I've converted my YS 140 FZ to an<BR>L. New crank, crank ring, L throttle barrel and new<BR>throttle barrel seal. Great increase in power, but<BR>can't get it to idle worth a damn. I either fly with<BR>a very high idle or it quits in the air after its been<BR>at idle. On the ground I have to either set a very<BR>high idle (>3000 rpm) or it just looses rpm until it<BR>dies. In the air if it doesn't have the very high<BR>idle it quits after any maneuver that needs it to idle<BR>on a long downline. It continues to idle but quits<BR>when I increase throttle.<BR><BR>Here are some of the particulars: OS F plug, Magnum 1<BR>and 1.5 fuel (acts the same with both fuels), 17-10N<BR>prop<BR><BR>When this engine was an FZ it ran and idled<BR>beautifully in this same plane (same tank, same fuel<BR>lines, same throttle servo). Just was a little shy on<BR>power
for the Masters sequence.<BR><BR>Things I've tried:<BR><BR>low speed need settings from 1 to 2 turns (lots of<BR>settings in between)<BR>new glow plug<BR>removed the regulator ballast<BR>put in a new piston ring<BR>drilled holes in the piston<BR>new diaphragm<BR><BR>None of the above made any difference I could tell. <BR>Have torn it down far enough to replace the piston<BR>ring and reassembled. Found nothing out of place.<BR><BR>Aside from buy another engine, I'd appreciate any<BR>suggestions.<BR><BR>Thanks,<BR><BR>Ed<BR><BR><BR><BR>__________________________________<BR>Do you Yahoo!?<BR>New and Improved Yahoo! Mail - Send 10MB messages!<BR>http://promotions.yahoo.com/new_mail <BR>=====================================<BR># To be removed from this list, go to http://www.nsrca.org/discussionA.htm<BR>and follow the instructions.<BR><BR></BLOCKQUOTE></DIV><BR><BR>Bob Kane<br>getterflash@yahoo.com<p>
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