Wolo 140 User Manual

INSTALLATION INSTRUCTIONS
Model 140-24 & 145-24 SEA ALERT™
24-Volt

Your purchase of a Wolo SEA ALERT™ Air Horn will complement your boat, while offering an extra level of
protection. Wolo’s products are manufactured with the finest materials. Before being packaged, each horn
is tested to ensure it meets all of our manufacturing specifications. If you need help installing your new Wolo
horn, our technicians are available to answer your questions, Monday thru Friday, 9 AM to 4 PM EST at
1-888-550-HORN (4676).

Before installation of the horn is attempted, it is important to read these instructions completely. The lives of
people can be dependent on a proper installation of the horn. The person doing the installation must have
knowledge of the proper method for mounting and securing the horn to the exterior of the boat, as well as
knowledge of the boat’s electrical system. Again, read the instructions completely and note any messages
marked “IMPORTANT” or “WARNING’’. A safe installation will prevent injury or damage to the boat.

WARNING: Installation of the SEA ALERT requires drilling. The installer must carefully inspect both sides of
the selected mounting locations to ensure that there are no wires, fuel lines and or any other components that
could be damaged by drilling.

WARNING: If any wires are routed through drilled holes, always de-burr ensuring that there are no sharp
edges. Install a rubber grommet into all metal holes that wires are being routed through.

MOUNTING TRUMPET: Fig. 1 & 2

IMPORTANT: The horn should be mounted facing forward

whenever possible. The NMMA Certification Program
requires this for boats 39’ or longer.

1. Locate the desired mounting location of the trumpet.

For best results, the front of the horn should be
unobstructed so that the sound can carry straight ahead.

IMPORTANT: FOR BEST PERFORMANCE AND SOUND,
ALWAYS MOUNT THE COMPRESSOR CLOSE TO
TRUMPET, KEEPING THE HOSE LENGTH AS SHORT AS
POSSIBLE. THE COMPRESSOR MUST BE MOUNTED IN
A DRY INTERIOR LOCATION).

2. Use the horn’s gasket as a template, mark hole locations
and drill to size.

3. Thread the chrome air inlet tube into the base of the horn.

4. Mount and secure the horn as shown in Fig. 1.

IMPORTANT: Be sure to use the provided rubber
gasket to protect against water leaks. Tighten the base
plate front screw and rear nut that threads onto the air
inlet tube evenly to ensure a watertight seal.

air inlet

tube

5. Position the front trumpet support bracket around the
narrow part of the trumpet. IMPORTANT: Provided in the
kit is a soft rubber strip that is placed into the ring of the
support bracket to provide a tight fit and prevent vibration.
Push the bracket forward until it is tight. Use the bracket as
a template, mark hole locations and drill to size. See Fig 2.

6. Secure the front trumpet support bracket using the hardware provided. Tighten screws evenly to

ensure a watertight seal. IMPORTANT: Be sure to use the rubber gasket provided to protect against
water leaks.

COMPRESSOR INSTALLATION: Fig. 3 & 4

7. Install the compressor in a dry interior location. IMPORTANT: The compressor
should not be mounted further than 30 inches from the trumpet to ensure best sound.

8. To secure the compressor, drill one 3/16” hole. When possible, mount the
compressor vertically (air outlet on top). Install the head of the bolt into the mounting
bracket’s slot on the side of the compressor. Secure the compressor using the lock
washer/nut provided as shown in Fig. 3.

9. Using the plastic tubing provided, cut to
size and connect the compressor to the
horn’s air inlet tube as shown in Fig. 4.

WARNING: Avoid making any kinks
or sharp bends in plastic tubing that
can reduce air flow and alter the horn’s
sound. For best performance and sound,
always keep the plastic tubing as short as
possible.

air

inlet

tube

WIRING:

ELECTRICAL CONNECTIONS FOR USING A NEW HORN BUTTON SWITCH Fig. 5

10. Install the horn relay provided,

Fig. 5

locate close to the compressor in a
dry interior location with the terminals
facing downward.

11. Connect relay terminal 87 to the
compressor’s positive (+) terminal. Use
16-gauge wire or heavier.

86

12. Connect relay terminal 85 to the
horn button switch terminal. (Horn
switch not provided).

13. The horn switch’s other terminal

15 AMP
FUSE

is connected to negative (-) such as
the (-) battery post battery post or any
clean metal negative surface. Use 18 gauge wire or heavier.

14. Connect relay terminal 30 & 86 to positive (+) 24-volts such as battery, alternator, fuse block or etc., using
16-gauge wire or heavier. IMPORTANT: Protect the electrical circuit with the fifteen (15)-amp inline fuse
provided. WARNING: The inline fuse provided must be connected directly to the power source.

15. Connect the compressor’s negative (-) terminal to boat’s negative (-) battery post or any clean metal
negative surface. Use not less than 16-gauge wire.

RECAP OF RELAY TERMINAL CONNECTIONS

Relay terminals 30 & 86: the two terminals are connected to 24-volts (+) positive, using the 15-amp inline fuse.
Relay terminal 85: is connected to horn switch.
The horn switch’s other terminal: is connected to negative (-) battery post.
Relay terminal 87: is connected to the compressor’s (+) motor terminal.
The compressor’s negative (-) terminal is connected the boat’s negative (-) battery post.