Furuno CU-300 Operator's Manual page 13

1. Prepare four fixing holes in the bulkhead whose dimensions are as shown below.
5
120+0.5
2. Fasten four pan head screws (M4) to fix the mounting plate to the unit.
3. Insert four studs at the top of the mounting plate in fixing holes made at step 1, and then pass
spring washers, flat washers and hex. nuts onto in that order from inside the bulkhead.
4. Tighten hex nuts to fix the unit.
Nut (M4)
120+0.5
198
42
#100
171
#20 #20
Dimensions for overhead mounting
4