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Author Topic:   Alarm Sounding on 13 Sport
philmaehr posted 08-27-2013 11:51 PM ET (US)   Profile for philmaehr   Send Email to philmaehr  
I hear an alarm coming from Gear Shift / Throttle Box. When I turn the key it goes on and stays on. Boat runs good otherwise. 5 season with 2001 and this just started. I was thinking this could be a low battery warning? Nothing in books on this.
DAVIDinMS posted 08-28-2013 01:05 PM ET (US)     Profile for DAVIDinMS  Send Email to DAVIDinMS     
I had what sounds like the same issue with one of my motors. It took a month and an expensive trip to the dealer for them to tell me i needed a new wiring harness. I brought the boat home and started looking at the wiring and found 2 diodes used in the alarm circuit. They are used to let the electric current only travel one direction within the circuit. They were both sealed in "waterproof" sleeves. Upon close inspection one of the sleeves was 1/2 full of rain water. I cut the sleeve off and let it dry fixing my alarm at no cost. The water was allowing the electric current to bypass the diode and sound the alarm.

P.S. I could have replaced the Diode for under $5.00 if it had been shorted out.

Tom W Clark posted 08-29-2013 10:38 AM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
You might want to explain what motor you are talking about. Brand? Year? Horsepower?

In general, a steady alarm means something is very wrong and the motor should be serviced immediately. Do not operate the motor until you figure it out.

philmaehr posted 09-02-2013 04:30 AM ET (US)     Profile for philmaehr  Send Email to philmaehr     
Davidims : I will try this. Today I replaced the battery, but alarm still sounded. I have a 30 hp mercury. Where would I locate those diodes?
jimh posted 09-02-2013 07:00 AM ET (US)     Profile for jimh  Send Email to jimh     
When an outboard engine sounds an aural alert, the cadence of the aural alert sound and the circumstances of its occurrence are cues to the meaning of the alarm signal. Normally the owner's manual of the engine explains how to interpret the aural alarm signal. Check the owner's manual carefully to see if the method of interpretation of the aural alert signal is explained. Also, the appropriate action to take is usually given. Finally, a course of repair is usually suggested.

The location of components of the engine is usually not given in the owner's manual. You will need the service manual to learn where particular components are located on the engine power head.

Generally in many older, simple, less sophisticated outboard engines, where the basic design and manufacturing methods go back decades, the aural alert system is often implemented in a wired-OR configuration with respect to sounding the aural alert, and many sensors can cause the aural alert to sound.

In any alarm system there are three possibilities when an alarm occurs:

--there is an actual alarm condition, a sensor has detected the out-of-tolerance condition, and the alarm is sounded;

--there is no alarm condition, a sensor has malfunctioned and has caused the alarm to sound; or,

--there is no alarm condition, the alarm system aural alert sounded is defective and is sounding.

Before assuming there is no alarm condition, you must carefully check all the sensor and the alarm sounder to verify they are not causing the problem. It is generally recommended to not operate the outboard engine while the alarm is sounding.

This topic is not really part of the small boat electrical sysem, and is probably not best discussed in the SMALL BOAT ELECTRICAL DISCUSSION. Diagnosis of engine problems and their repair is usually best done in the REPAIRS/MODS discussion. Look for this thread to move there.

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