Airmar, Installation, Checking for leaks – Airmar Recall: Replacement Bracket Support—TM258 User Manual
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Copyright © 2012 Airmar Technology Corp. All rights reserved.
AIRMAR
®
TECHNOLOGY CORPORATION
35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA
■
www.airmar.com
Figure 4. Severed transducer support
bracket
transducer
transducer
hinge
locking
spacer
safety
washer (2)
pin
pin
ring (4)
Copyright © 2009 Airmar Technology Corp.
Figure 5. Detaching/attaching transducer assembly to bracket
support
5. Remove the remaining section of the transducer support from
the bracket by remove one safety ring from the end of each pin 
(see Figure 5). Remove the pins. Set the two pins, two washers, 
and spacer aside to reuse. Discard the cut transducer support.
Installation
1. The replacement transducer support has a slot that allows it to
slide onto the transducer cable (see Figure 6). Slide the support 
into place and align the screw holes with the transducer (see 
Figure 2). Fasten the transducer support to the transducer using 
the three socket-head-cap screws and washers. Tighten the 
screws with the 3/16" Allen wrench supplied.
2. While holding the transducer assembly against the bracket, insert
one of the pins through the upper hole in the bracket and the 
transducer support (see Figure 5). Slide the spacer onto the pin 
and push it through the remaining hole in the support and the 
bracket. Attach a second safety ring to the free end. This pin will 
function as a hinge when the transducer is released.
3. Slide a washer onto the remaining pin. Push it through the
lower hole in the bracket, sliding it along the channel in the 
transducer support and through the second hole in the bracket 
(see Figures 5 and 7). Slide the second washer onto the free 
end of the pin and attach the last safety ring. This pin will 
function as the locking pin to hold the transducer in the 
operational position when the boat is underway.
4. If you have removed the cable cover and/or cable clamps for
easier installation, reattach them (see Figure 1). Apply marine 
sealant to the threads of the #6 x 1/2" self-tapping screws to 
prevent water from seeping into the transom. If there is a hole 
drilled through the transom, apply marine sealant to the space 
around the cable where it passes through the transom. Position 
the two cable clamps and fasten them in place. If used, push 
the cable cover over the cable and screw it in place.
Checking for Leaks
When the boat is placed in the water, immediately check for 
leaks around the screws and any other holes drilled in the hull. 
Note that very small leaks may not be readily observed. Do not 
leave the boat in the water unchecked for more than three hours.
Copyright © 2009 Airmar Technology Corp.
Figure 7. Detail: Attaching the locking pin
channel
Figure 6. Replacement transducer support
slot for
cable
bracket
transducer
support
severed
support
gap between
support &
transducer
