Not a bad idea to set the SerialOut pin to it's idle state before the first time you'll use it... unless the first character might be screwed-up...
Code:
        BUT1 VAR PORTB.1    'vars for switches
        BUT2 VAR PORTB.2
        BUT3 VAR PORTB.3
        BUT4 VAR PORTB.4
        HIGH PORTA.0 ' set to normal idle state (1 for True, 0 for Inverted)
        PAUSE 50 'settle delay

LOOP:
        IF BUT1 = 1 THEN SEROUT PORTA.0,T2400,[9,1]  'sends 9 and 1 if but1 is high
        IF BUT1 = 2 THEN SEROUT PORTA.0,T2400,[9,2]
        IF BUT1 = 3 THEN SEROUT PORTA.0,T2400,[9,3]
        IF BUT1 = 4 THEN SEROUT PORTA.0,T2400,[9,4]
        GOTO LOOP