The ornamental design for a steeringrunner for a snowmobile ski, as shown and described.
FIG. 1 is a side elevational view of a steering runner for a snowmobile ski showing my new design of the present invention, it being understood that the opposite side is a mirror image thereof;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a rear end view taken from the left side of FIG. 1;
FIG. 5 is a front end view taken from the right side of FIG. 1; and,
FIG. 6 is a perspective view thereof, taken from the left side of FIG. 5.