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Old 02-20-2017, 08:36 AM
DHeal DHeal is offline
Join Date: Sep 2006
Location: Windsor, California
Posts: 1,013

Paul -- Those indentations are for the safety wiring of your drain plug to the oil tank. These indentations typically have small holes drilled horizontally through them for the passing of the safety wire. They certainly should not leak -- if they do, it may mean that the hole was inadvertently drilled into the fluid-holding portion of the tank. I would make sure it is in fact leaking before you drain the oil tank and inspect/test that area for a leak. If it is leaking there, that would seem to me to be a ROTAX warranty item. -- David

ps -- Always "double-wrench" that boss/plug when removing/tightening the assembly -- you might mess up the boss/tank bottom if over-torqued.
David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 1,170+ hours (as of May 2022)!
VAF donation through June 2023.
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