Aftermarket Mercruiser 69354A2 Engine Coupler
The Sierra 18-4442 Engine Alignment Tool replaces Mercruiser 805475A1. It is used to verify engine alignment on MC-I, R-MR, Alpha One, Alpha One Gen II and Cobra models.

What is Sierra 18-4442?
Sierra 18-4442 is an aftermarket engine alignment tool for Mercruiser applications.
Which part numbers cross-reference Sierra 18-4442?
This listing cross-references GLM 90050, GLM 91-37384 and Mercruiser 805475A1. See the Cross References & Alternative Products section above for linked alternatives where available.