---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sat 09/15/07: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:01 AM - Re: 582 plugs up or down perf.? (Thom Riddle) ________________________________ Message 1 _____________________________________ Time: 05:01:02 AM PST US Subject: RotaxEngines-List: Re: 582 plugs up or down perf.? From: "Thom Riddle" I had a CH701 several years ago with the 582 mounted inverted. The only problem I had in the short time I owned it, was that after sitting for a couple weeks, the plugs needed to be removed and cleaned before starting. This was due to unburned fuel settling in the bottom (the head). One way to mitigate this would be to turn off the fuel supply before shutting down the engine and run the engine until it quits. There will be no fuel left to settle into the head. The only problem I see with this "solution" is that if the two carburetors are not set up exactly the same (float level, mixture, etc) the fuel burn rate will be slightly different and one will run out before the other which would result in rough running for the last few seconds, which is hard on the gearbox. I didn't do this on mine. If it was hard starting after a couple weeks of sitting, I'd clean the plugs and be back in business. On Challengers with inverted 503 engines, there are a lot of crank failures reported. See http://tinyurl.com/2r64ym The 582 has a rotary valve for lubricating something (crank maybe?, not much else inside the case) but I'm not absolutely certain what. If it is lubricating the crank then the problems encountered with the inverted 503 engines in Challengers may not be an issue with the 582. Bottom line is that it is preferable to run the engine with the heads up. But Chris Heinz is a very sharp engineer and I seriously doubt that he would even offer this combination unless he was certain that running the 582 inverted would not be a problem in terms of reliability. I suggest you ask Zenith and Lockwood or other Rotax distributor about this to be certain. -------- Thom in Buffalo N221FA Allegro 2000 912UL N197BG FS1/447 -------------------- "Setting an example is not the main means of influencing another, it is the only means." Albert Einstein Read this topic online here: http://forums.matronics.com/viewtopic.php?p=134520#134520 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.