Regal LS4C Owner's Manual page 148

Trim Switch-Transom
If installed the a trim switch is outfitted on the
transom. This location permits the stern drive to
be trimmed from the transom which is great for
inspecting the drive and more importantly the
propeller without needing to remove the vessel
from the water.
To operate the switch depress and hold the top
portion of the switch until the desired "up" trimming
angle is realized. Make sure there are no body
parts or any other components near the stern drive
before you raise it.
To trim the drive unit down depress and hold the
lower portion of the switch until the desired "down"
trim angle is reached. Again, make sure there are
no body parts or other components near the drive
before you lower it.
WARNING
AVOID SERIOUS INJURY!
KEEP HANDS AND FEET AWAY
FROM DRIVE UNIT & PROPELLER
WHEN USING TRIM SWITCH.
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