TCONROY
Well Known Member
I've studied the OP-XX drawing which shows the hole spacing for the doubler plate to be fabricated for the firewall fuel line passthru (Horizontal Induction IO-360). I'm not sure I understand it though. One hole in the doubler is supposed to be matched with one of the rivets that is just underneath and right of the starter solenoid. However, if that doubler is supposed to be on the cabin side of the firewall, I don't see how it could be since a stiffener is located in the same place. I also remember reading about some builders recommending moving the hole an inch or two inboard to space it a little farther away from the starter solenoid. Does anyone have any measurements or pictures? Thanks!