Except Justy

Before adjusting Hill-Holder PHV cable, ensure clutch pedal free play is within specification. Free play at clutch pedal should be .39-.79" (10-20 mm).
Free play at clutch fork should be .12-.16" (3-4 mm). If free play is not within specification, adjust clutch free play by turning adjusting nut on engine side of clutch cable release fork.
Check stopping and starting performance by activating Hill-Holder on an uphill road with more than 3 degree incline. If vehicle does not stop, tighten PHV cable at PHV. See Fig 1
NOTE: Hill-Holder may not activate on a very slight incline.

Fig 1: Locating Hill-Holder Components (except Justy)
Courtesy of SUBARU OF AMERICA, INC.
If Hill-Holder releases too late (engine tends to stall), loosen PHV adjusting cable at clutch release fork in small increments until smooth starting is possible. See Fig 2. If Hill-Holder releases too early (vehicle slips backward slightly), tighten cable in small increments until smooth starting is possible.
To adjust Hill-Holder to apply on a slight incline, insert Shim (725807000) between side frame and PHV support bracket (raising front of PHV). Shims are .024" (.6 mm) thick and will increase PHV angle 1/2 degree. DO NOT raise front of PHV excessively. Never insert more than one shim at a time.

Fig 2: Locating PHV Cable Lock Nut at Clutch Fork (except Justy)

Courtesy of SUBARU OF AMERICA, INC.