Furuno GP-1850DF installation manual AP-3

2° -10°transom angle	11° transom angle	19° -22°transom angle
	NO SHIM
shim with		shim with
taper down		taper up
YES	YES	YES
parallel	parallel	parallel
	12-18°transom angle
	NO SHIM
NO	YES	NO
angle	slight	angle
reversed	angle	too steep

Figure 5. Sensor angle adjustment on transom

2.To adjust the sensor’s angle relative to the hull, use the tapered plastic shim provided. If the bracket has been temporarily fastened to the transom, remove it, Key the shim in place on the back of the bracket.

2°-10° transom angle (stepped transom and jet boats)—Position the shim with the tapered end down.

19°-22° transom angle (small aluminum and fiberglass boats)— Position the shim with the tapered end up.

3.If the bracket has been temporarily fastened to the transom, remove it. Apply a marine sealant to the threads of the two

#10 x 1-1/4” self tapping screws to prevent water seeping into the transom. Screw the bracket to the hull. Do not tighten the screws completely at this time.

4.Repeat step 1 to ensure that the angle of the sensor is correct.

Caution: Do not position the sensor farther into the water than necessary to avoid increasing drag, spray, and water noise and reducing boat speed.

5.Using the vertical adjustment space on the bracket slots, slide the sensor up or down to provide a projection of 3mm (1/8”). Tighten the screws (see Figure 6).

Attaching the Sensor to the Bracket

1.If the retaining cover near the top of the bracket is closed, open it by depressing the latch and rotating the cover downward

(see Figure 4).

2.Insert the sensor’s pivot arms into the slots near the top of the bracket.

3.Maintain pressure until the pivot arms click into place.

4.Rotate the sensor downward until the bottom snaps into the bracket.

5.Close the retaining cover to prevent the accidental release of the sensor when the boat is underway.

APPENDIX TRIDUCER 525ST-PWC/PWD

Cable Routing

Route the sensor cable over the transom, through a drain hole, or thorough a new hole drilled in the transom above the waterline.

Caution: Never cut the cable or remote the connector; this will void the warranty.

Warning: Always wear safety goggles and a dust mask.

1.If a hole must be drilled, choose a location well above the waterline. Check for obstructions such as trim tabs, pumps, or wiring inside the hull. Mark the location with a pencil. Drill a hole through the transom using a 19mm or 3/4” bit (to accommodate the connector).

2.Route the cable over or through the transom.

3.On the outside of the hull secure the cable against the transom using the cable clamps. Position a cable clamp 50mm(2”) above the bracket and mark the mounting hole with a pencil (see Figure 6).

4.Position the second cable clamp halfway between the first clamp and the cable hole. Mark this mounting hole.

5.If a hole has been drilled in the transom, open the appropriate slot in the transom cable cover. Position the cover over the cable where it enters the hull. Mark the two mounting holes.

6.At each of the marked locations, use a 3mm or 1/8” bit to drill a hole 10mm (3/8”) deep. The prevent drilling too deeply, wrap masking tape around the bit 10mm (3/8”) from the point.

7.Apply marine sealant to the threads of the #6 x 1/2” self-tapping screw to prevent water from seeping into the transom. If you have drilled a hole through the transom, apply marine sealant to the space around the cable where it passes through the transom.

8.Position the two cable clamps and fasten them in place. If used, push the cable cover over the cable and screw it in place.

9.Route the cable to the instrument being careful not to tear the cable jacket when passing it though the bulkhead(s) and other parts of the boat. To reduce electrical interference, separate the sensor

cable from other electrical wiring and “noise” sources. Coil any excess cable and secure it in place with zip-ties to prevent damage.

10.Refer to your echosounder owner’s manual to connect the sensor to the instrument.

cable cover

cable clamp

50mm (2")

Hull projection 3mm (1/8")

Figure 6. Vertical adjustment and cable routing

AP-3