This document covers the recommended procedure for calculating or verifying the correct mount kit size for an Airmaster propeller based on the aircraft’s engine and cowl geometry.
A mount kit selection form is provided at the end for new customers to complete and return to Airmaster.
In some cases, the propeller’s mounting position must be adjusted relative to the engine flange to ensure adequate clearance between the spinner backplate and the engine cowling. This adjustment is achieved using a spacer, extension or adapter assembly (referred to as ‘mount kits’).
While these requirements are usually pre-determined and the appropriate mount kit is supplied with the propeller system, installers should verify before propeller installation that the provided mount kit ensures proper fit and spacing with the aircraft engine and cowling.
Calculating Mount Kit Requirements 
Mount Kit Worksheet
