Marty West, showing the form that made him one of the country's top amateur golfers for many years, took a five-stroke lead at 214 over Gary Marlowe into today's final round of the Middle Atlantic Amateur championship at Congressional.

The cutoff was at 236, with 42 players eligible for the last 18 holes.

West added 72 yesterday to his two previous 71s to remain two under par, while Marlowe struggled with a 76 on a day many of the contenders eliminated themselves with high scores.

Henry Blue of Baltimore, close on West's heels the first two days, skied to 83. Barry McCarty, the District champion, took 81.

Gill FitzHugh, the Northern Virginia champion, could do no better than a 75 that put him at 223 along with Paul Ryan, the home club hope, who won the Middle Atlantic Open last year. Ryan had a 77.

"West is really moving along," commented Marlowe, who played with the Columbia Country Club star. "Marty didn't let anything bother him, even when he wasn't hitting the greens."

West played steadly if unspectaclarly. he hit only three greens on the front side but managed a string of pars, except for the fourth hole, where he went into the trees on his drive and made his only bogey. He was out in 37 and home in 35 with eight pars and a birdie on the 10th where he made a four-foot putt for his four.

Marlowe started by three-putting the first hole for a bogey. He had double bogeys on the second and 13th holes, also with three putts, in an erratic round incorporating three birdies, three bogeys and two double bogeys.