MARINCO 10105 Single Trumpet Mini Air Horn

Installation Instructions

Single Trumpet Mini Air Horn
10105 & 10123
Required For Installation and Not Included With This Horn:

• 10 Size Pan-head Mounting Screws (2)

• 8mm Bolt (1) or 1/4” Pan-Head Screws (2) (For Compressor Mounting)
• 1/4” Female Quick-Connect Tabs (2)
• Horn Button Rated For 20 Amps
• 20 Amp Fuse & Fuse Carrier
• Red Stranded Wire (For Positive)*
• Black Stranded Wire (For Negative)*
  •  See Wiring Chart For Wire Size

Tools Required for Installation:

• Phillips-Head Screwdriver
• 7/16” Drill Bit
• Electric Drill
• Soldering Gun & Solder (Optional)
• Crimping/Cutting Pliers
• Silicone Sealant

If any hardware components are missing, please contact Marinco Customer Service at 1-800-307-6702.

Horn Installation

1. Determine the mounting position of the horn. Be careful to select a location with minimum deck curvature and where a minimum amount of spray will hit the horn when the boat is underway. Whenever possible, the horn should be mounted with the trumpet pointing downward so that it does not collect water spray.
2.  Screw the tubing connector into the nut on the base of the horn and tighten securely. Note: The tubing connector provided will work for decks up to 3/4” thick. For thicker decks, counter-bore the deck hole from under the deck surface.
3. Using the horn base gasket as a template, determine the location for the tubing connector hole.
4. Mark and drill a 7/16” hole through the deck. Before drilling, check to make sure you are not going to drill through something vital, such as wiring or plumbing.
5. Place the gasket on the deck. Place the horn assembly on the deck with the tubing connector fitted into the hole.
6. From under the deck surface, place the washer and nut on the tubing connector and tighten until snug. Install a #10 size pan-head screws of appropriate length in the horn base to prevent the horn from moving around.
7. Connect the air hose to the tubing connector by sliding it over the fitting and pressing it up about 3/4”.

Install the horn support bracket (optional).

1. Open up the clamp ring and place it around the neck of the trumpet.
2. Attach the support bracket to the clamp ring with the small machine screw and nut provided (do not tighten all the way).
3. Slide the clamp ring forward until it is snug around the trumpet.
4. Finish tightening the machine screw and nut.
5. Place the gasket under the base of the support bracket and attach the bracket to the deck with two #10 size pan-head set screws of appropriate length.

Single Trumpet Mini Air Horn 10105 & 10123

Compressor Installation

1. For maximum efficiency the compressor should be mounted as close as possible to the horn. A shorter length of air hose will improve performance. The compressor should be mounted on a firm surface where it will be protected from moisture and high temperatures, but is still accessible for maintenance purposes.

2. The compressor can be mounted two ways: by using the metal mounting strap or the mounting side-bracket on the compressor.
   Strap

   • Place the strap over the center of the compressor.

   • Install the strap nut and bolt through the holes in the bottom of the strap and tighten until the strap is snug around the compressor.

   • Mount the compressor and strap using two 1/4” size pan-head screws of appropriate length.
     Side-bracket

   • install an 8mm bolt and “hang” the compressor on the bolt.

3. 3. Trim the air hose to the proper length using a sharp knife.

4. Install the air hose onto the compressor by sliding it over the air port opening. Be sure there are no kinks in the air hose that will impede air flow.

5. Lubricate the compressor every 4-5 months to prevent possible loss of air volume. To lubricate the compressor, remove the air hose from the compressor air port and place 3 to 4 drops of light machine oil into the air port opening. Do not over lubricate. Let the oil set for a few minutes and then activate the compressor momentarily to distribute the oil.
   Failure to activate the compressor before re-connecting the air hose may result in oil being blown onto the horn diaphragm and contaminating it.

6. Re-connect the air hose.

Single Trumpet Mini Air Horn 10105 & 10123

Compressor Wiring

1. Select the proper stranded wire size for the length of wire you will need from the Wire Size chart.
2. The length of wire should be sufficient to allow enough slack to prevent undue tension at the connection points.
3. Connect the wires as shown in the wiring diagram. It is recommended that the quick-connect tabs be soldered to the stranded wire for the best and most reliable connection to the compressor. Suggestion: Use the Marinco Direct Connect Multi Connection Battery Terminals (Part #12VTR) to connect the wiring to the battery.
4. If horn volume is weak, recheck all the wiring and air hose connections.

Wire Size Chart for 12V Installation

AWG: American Wire Gauge

• * As measured from the battery to the compressor and back to the battery (round trip).To replace an electric horn with this air horn you may need to replace the wiring with a heavier gauge wire and fuse that will carry 20 amps as shown in the Wire Size Chart.

Installation Instructions

Troubleshooting Tips
If the air horn does not produce any sound or is low in volume, check the following:

1. Check to see if the 20A fuse has blown.
2. Check the air hose for kinks that could impede air flow.
3. Check the wiring for broken or frayed wires. Check the compressor with a DC voltmeter. Make sure there is 12 volts across the two compressor terminals while the horn button is being pushed.
4. Check the horn diaphragm. Remove the 5 phillips head screws on the horn end cap and remove the plastic diaphragm. Inspect the diaphragm for contamination. If there is dirt or oil on it, clean with a soft dry cloth and re-install. In the unlikely event that the diaphragm is torn, call Marinco customer service for a replacement part #20147.
5. Check compressor lubrication. If the compressor has not been lubricated on a regular basis (every 4-5 months) it could lose air volume. Lubricate as per instruction #4 under “Mounting The Compressor”.
6. It is very important that when lubricating the compressor, the oil is allowed to settle and the compressor is activated BEFORE re-attaching the air hose. Failure to do this may result in oil being blown onto the diaphragm and contaminating it.

Warranty information: www.marinco.com/limited- warranty

References

• Home | Marinco

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