Jim McMahon threw seven touchdown passes and broke four NCAA records yesterday as Brigham Young beat Colorado State, 63-14, in a Western Athletic Conference game at Fort Collins, Colo.

McMahon, who passed for 538 yards before being replaced with 3:24 to play.

McMahon said it was "something I've always wanted to do."

McMahon started the day with 41 NCAA recordsand was tied for a 42nd. He left the game with 44 records and two ties. The 6-foot senior hit tight end Gordon Hudson on a four-yard flare pass late in the first quarter to break former Purdue star Mark Herrmann's all-time NCAA total career offense record of 8,444 yards.

McMahon, who completed 44 of 65 passes, finished the day with a career total of 8,897 yards in total of 8,897 yards in total offense. His 44 broke the national record of 43 held by Dave Wilson of Illinois and Rich Campbell of California.

McMahon's seven touchdown passes tied former BYU star Marc Wilson's record set in 1978. McMahon's third national record came on a six-yard touchdown pass to Hudson late in the first quarter.

That gave him his 87th entry in the "touchdowns responsible for" category. McMahon finished the game with 90 touchdowns "responsible for" in his career, bettering Tennessee State's Joe Adams, who set the record in 1980 with 86.

McMahon is tied for the most seasons gaining 2,500 yards or more, with Jim Plunkett of Stanford, Gary Huff of Florida State, Gene Swidk of Toledo and Steve Brown of Appalachian State.

With more than 8,600 passing yards, and two games to go, McMahon is well within reach of Hermann's four-year passing yardage record of 9,188.

Brigham Young, still in contention for the WAC title, is 8-2 overall and 5-1 in the league. CSU dropped to 0-9 and 0-6.