Furuno 1650DF Manuel D’Utilisation

APPENDIX TRIDUCER 525ST-PWC/PWD 

 

 

for starboard side of boat

Drill at locations labeled "B"

for the following transom angles:

16

°

 through 22

°

Drill at locations labeled "A"

for the following transom angles:

2

°

 through 15

°

Align arrow with bottom of transom

A

A

A

B

B

B

Align template vertically

deadrise angle

slope of hull

parallel to
waterline 

Align template arrow with
bottom edge of transom

Figure 3. Template position

Step 1

Step 4

Step 3

Step 2

latch

retaining
cover

pivot
arm (2)

slot (2)

Figure 4. Attaching the sensor to the bracket

Bracket 
1. 

Cut out the installation template shown on the left. 

2. 

At the selected location, position the template, so the arrow at the 
bottom is aligned with the bottom edge of the transom. Being sure 
the template is parallel to the waterline, tape it in place   
(see Figure 3). 

3. 

Using a 4mm, #23, or 9/64” bit, drill three holes 22mm (7/8”) deep   
at the locations indicated. To prevent drilling too deeply, wrap 
masking tape around the bit 22mm (7/8”) from the point. 
Fiberglass hull—Minimize surface cracking by chamfering the 
gelcoat. If a chamfer bit or countersink bit is not available, start 
drilling with a 6mm or 1/4” bit to a depth of 1mm (1/16”). 

4. 

If you know your transom angle—The bracket is designed for a 
standard 13° transom angle. 
11°-18° angle—No shim is required. Skip to “Adjusting”, step 3. 
Other angles—The shim is required. Skip to “Adjusting”, step 2. 

If you do not know the transom angle—Temporarily attach the 
bracket and sensor to the transom to determine if the plastic shim is 
needed. 

5. 

Using the two #10 x 1-1/4” self-tapping screws, temporarily screw 
the bracket to the hull. Do not tighten the screws completely at this 
time. Follow the instructions for “Attaching the Sensor to the 
Bracket”, steps 1-4 before proceeding with “Adjusting”. 

1. 

Using a straight edge, sight the underside of the sensor relative to 
the underside of the hull. The stern of the sensor should be   
1-3mm (1/16-1/8”) below the bow of the sensor or parallel to the 
bottom of the hull (see Figure 5).