The shorter arm gauge is for the smaller (about 8") KBE5S tank.
Installation is simplly unscrewing the old and screwing in the new.
Make sure the arm is straight before installing.
Fuel Gauge - KBE5S
SKU: KSL-T-17
$30.59Price
INFO
Item Number: KSL-T-17
VAL6 MODEL: KBE5S
MEASUREMENTS
Length: 0 Width: 0 Height: 0