The ornamental design for a lowerunitguard for marine outboard motor and stern drive, as shown and described.
FIG. 1 is a side elevational view of a lower unit guard for marine outboard
motor and stern drive showing my new design, with the lower unit of an
associated outboard motor or stern drive shown in broken line for
illustrative purposes only;
FIG. 2 is a front elevational view thereof as seen from the right in FIG.
1;