Furuno FSV-25 Operator's Manual page 147

5. Use a radio pincers to remove two lock pins (left, right).
Lock pin
2 pcs, left, right
6. Remove the motor brake cover.
7. Unfasten two bolts (left, right) to access the waterproofing gasket. Remove the
gasket.
8. Loosen a set screw to remove the fan.
8. MAINTENANCE, TROUBLESHOOTING
Waterproofing
gasket
Set screw
Fan
8-21