Humminbird 997c Combo GPS Receiver Installation, Stem Mounting with an Existing 1 14 Thread Stem

GPS Receiver Installation

To optimize performance of the GPS receiver, mount it in an area that has full exposure to the sky. The effective area of reception is 10° above the horizon. Different circumstances determine the mounting method appropriate for your GPS receiver.

If you have… Then use:

Stem Mounting with an Existing 1" - 14 Thread Stem

Follow these steps to stem mount the GPS receiver:

NOTE: If you have an existing stem for mounting the GPS receiver, proceed directly to step 2 of the following procedure.

1. Determine the best location to mount your GPS receiver. Preplan

and test the cable routing to your control head before any drilling or

cutting of your boat surfaces. If you have purchased hardware to

An existing antenna stem with standard 1" – 14 thread stem

Access for cable routing under the mounting location

No access under the mounting location

Stem Mount with Existing 1” - 14 Thread Stem

Access Under Mounting Location

No Access Under Mounting Location

stem mount your GPS receiver, follow the instructions included with

that hardware to mount the stem (antenna pole).

NOTE: AS-EC10 10' extension cables are available from Humminbird® if your planned routing exceeds 20', (6 m). Maximum cable length, including extensions, should not exceed 50' (16 m).

NOTE: Remember to caulk or seal screw holes and drilled holes as needed to protect your boat from water damage.

The pinouts of the pigtail cable are as follows:

•Red Wire, +12V (output voltage only)

•Black Wire, Ground

•White Wire, NMEA Out.

CAUTION! Please use caution before connecting the red +12V wire to any other NMEA device. This is an output voltage provided by the Fishfinder unit and GPS receiver and should only be connected to those NMEA devices that need a 12 volt input.

12. Screw on the receiver base to the stem first, making sure that the stem pipe does

2 not protrude from the receiver base. This adds protection to the cable when pulling it through the pipe stem. In addition to this, de-burr the pipe edges to reduce cable

abrasion.

1	Receiver	3
2	Receiver Base

3Stem Pipe

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