Multi-directional marine propulsors for use with boats having a hull, a keel and a motor with a propeller are disclosed. In a described embodiment, a liftable suspension system for use on a vehicle includes wheel spindles positioned to extend outwardly at each respective lateral side of the vehicle. Each PLIM comprises a visible laser diode (VLD, a focusing lens, and a cylindrical optical element arranged therewith. Heater grooves in the first half, second half or both the first and second halves receive one or more heating elements for heating the flow channels. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.