Kim Williams, 18, a Wootton High School senior from Bethesda Country Club, won the 49th annual Keefer Cup golf tournament yesterday on her first try, with a two-day net total of 148 at Chevy Chase Club.

Williams, a nine-handicapper who said she prefers basketball to golf, won by three strokes. Lisa Abood of Kenwood, a four-handicapper who was tied with Williams for first place in the net division after the first round, took low gross prize with 77-88 -- 159.

tThere was a three-way tie for the lead at 151 in the net division among Abood, Cloey Hardesty of Argyle and Jeanne Tiernan of Army Navy before Williams, playing in the final twosome, came in with a gross 82.

The Keefer Cup, named for the late Mrs. Frank Keefer, was first played in 1932 and annually opens the Women's District Golf Association tournament season.

Williams, a 6-footer who played girls varsity basketball and then golf on the boys' team for Wootton, has been playing golf only two years. She will graduate from high school next month but is undecided on which college to attend.

A power hitter who skies every drive, Williams found conditions a bit rough because of a stiff wind. She registered seven pars, a birdie on the par-5 third hole when she got on the green in two and two-putted, and a triple bogey on the par-4 14th when she took five to reach the green and two-putted.