---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sun 07/09/23: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:25 AM - Re: Tach drive (Robin Hou) ________________________________ Message 1 _____________________________________ Time: 11:25:50 AM PST US Subject: Yak-List: Re: Tach drive From: "Robin Hou" Hi George, Thanks for your comment. Unfortunately the tach drive gear must have been pulled before I purchased the engine many years ago. Not knowing that, coupled with the good luck (or bad luck?) I was able to place the prop on the only cylinder that was getting the start air and run this new engine for 10 min during which time the air distributor gear badly damaged the oil pump drive shaft. I wish the manual called for checking air distributor timing verification as a part of its de-preservation process but, in my case, it is too late now. So my original question is not relevant anymore because I will send my engine to a shop for repair. Best regards, Robin [quote="GeorgeCoy"]My 2 cents. If you pull the inner pat of the Russian tach drive, There is a good chance the mating bevel gear has dropped down. We had a client with an almost new TW do this and got it started. The bevel gear chewed trough another shaft and fille the engine with mental. If it is reinstalled already, you can check the air start timing to confirm that it did not move. George Coy --[/quote] Read this topic online here: http://forums.matronics.com/viewtopic.php?p=511081#511081 Attachments: http://forums.matronics.com//files/pxl_20230708_1827076362_152.jpg ------------------------------------------------------------------------------------- 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.