4 OZ. SPRING, SU E1 (1042-0566)

4 OZ. PISTON RETURN SPRING FITS OLD MODEL SU ELIMINATOR 1 CARBURETORS (PRE-1997 NON-BALL BEARING).
PISTON RETURN SPRINGS COME IN (3) DIFFERENT WEIGHTS; 4 OUNCE, 8 OUNCE, AND 12 OUNCE. THE NORMAL CONFIGURATION IS WITH AN 8 OUNCE SPRING. IT MAY BE NECESSARY TO CHANGE THE SPRING TO AFFECT THE IDLE MIXTURE. THE 4 OUNCE IS LEANER AND THE 12 OUNCE IS RICHER (IN COMPARISON TO THE 8 OUNCE SPRING). FOR INSTANCE, IF YOU HAVE A SHOVEL THAT IS NOT IDLING PROPERLY DUE TO INSUFFICIENT FUEL, YOU MIGHT PUT IN A 12 OZ SPRING.