Abstract: A portable multi-purpose workstation assembly for allowing users to mount two engines side-by-side and to easily transfer parts from one engine to the other engine. The portable multi-purpose workstation assembly includes a base assembly including a plurality of elongate base members, and also including base connecting members interconnecting and supporting the elongate base members, and further including wheel assemblies upon which the elongate base members and the base connecting members are supported; and also includes a support assembly being adjustably mounted upon the base assembly, and including sleeve members being disposed about one of the elongate base members, and also including post members being attached to the sleeve members, and further including bracket assemblies being mounted upon the post members.