Garrett Metal Detectors Sea Hunter Mark II None - Manual (Page 27)

MAiNTENANCE
1. Wash off any sand, salt and residue
from the detector immediately after each
use.
2. Avoid high, internal temperatures by
protecting the equipment from the sun.
Store equipment in a cool location; avoid
storage in a hot vehicle.
3. Take advantage of Garrett's preventative
maintenance program. For a small fee,
the factory will inspect the entire detector,
replace its seals and pressure test it.
Contact the factory for more details.