This document covers the procedure for installing Airmaster drive lugs into the engine flange.
In some cases (e.g. for spacers assemblies greater than 0.75in, or extension assemblies incorporating non-threaded drive lugs), there is insufficient clearance behind the engine flange to pass the mounting bolts through the drive lugs once they have been inserted into the engine flange. As a result, an alternative method must be used to install the drive lugs and mounting bolts simultaneously.
Installers should check whether this applies before installing the drive lugs; by checking there is sufficient clearance behind the engine flange to pass the mounting bolts through the rear. Installers should refer to the method that is applicable for their setup.
Drive Lug Installation 
