---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sun 11/04/18: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:06 PM - Re: Engine running rough at high power settings? (apatton2) ________________________________ Message 1 _____________________________________ Time: 05:06:57 PM PST US Subject: Yak-List: Re: Engine running rough at high power settings? From: "apatton2" OK, here I am again with the same problem. Coming into the break today at home airport at full throttle / 82% rpm, all of a sudden had the same engine vibe/ roughness. Pulling throttle back 1/4 did nothing. Pulling prop control back to 70% completely eliminated it. I waited a couple seconds and moved prop back to 82%. No vibe anymore, even at that higher prop setting that was an issue just 10 sec prior. Next time I am going to mag check it right away... it's one of those situations where you want to stop the vibe ASAP when it happens, though, so may be a bit too spring-loaded on that. Dennis, in terms of the sticking valves... is this something that you can use a borescope to reveal? I have added MMO and camguard (at different times) to the oil as you recommended. Did not see an issue for awhile after that, but again this has been super intermittent. Any thoughts welcome! Andrew -------- Andrew Patton Yak-50 San Francisco, CA Read this topic online here: http://forums.matronics.com/viewtopic.php?p=484351#484351 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-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/yak-list Browse Digests http://www.matronics.com/digest/yak-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.