This document covers the procedure for fitting an Airmaster spacer assembly to the propeller hub. Installers must complete this task before mounting the hub to the engine flange.
Airmaster offer several types of spacer assemblies. Generally, spacers that are 0.75 inches or longer must be pre-fitted to the propeller hub. This procedure is not required for spacers shorter than this length.
Some spacer assemblies incorporate electrical wiring (such as when a standard slipring assembly is used), while others do not (such as when a mini slipring assembly is used). Installers should follow the steps applicable for their specific setup.
Pre-Fitting Spacer Assembly 
