---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Tue 06/15/21: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:59 AM - Re: 503 troubles ..... (Stuart Harner) ________________________________ Message 1 _____________________________________ Time: 04:59:32 AM PST US From: "Stuart Harner" Subject: RE: Kolb-List: 503 troubles ..... What happens if you apply the enricher as it starts to bog down? If making the mixture more rich helps then it is running lean when bogging down and you likely have an air leak. The only two places I can think for air leak is the carb boot or the crank seals. Carb boots are notorious for this and easy to replace. I hope your crank seals are fine. If making the mixture more rich contributes to the problem it is already running too rich. Are you seeing any additional smoke at 4000 RPM? If too rich, perhaps the little rubber tip on the enricher is bad and letting too much fuel in. Let us know what you find. From: owner-kolb-list-server@matronics.com [mailto:owner-kolb-list-server@matronics.com] On Behalf Of artdog1512 Sent: Monday, June 14, 2021 10:28 PM Subject: Kolb-List: 503 troubles ..... Did the engine previously run normally with that same prop at the same pitch? And now will not? Or is this a new engine prop combination? -------- Richard Pike Kolb MKIII N420P (420ldPoops) Kingsport, TN 3TN0 same prop.. no change to pitch. ............ i'm suspecting the carbs. the engine runs smooth up to 4000 rpm, beyond 4000 it bogs down. it is rather old, i wonder if the seals in the carbs are leaking and sucking air?... i have ordered 2 seal kits for the carbs. stay tuned! 2 broke Tim ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message kolb-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Kolb-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/kolb-list Browse Digests http://www.matronics.com/digest/kolb-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.