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Old 06-13-2010, 12:31 PM   #1
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Default How to test alarm buzzer on Yamaha outboard

I have 2 stroke Yamaha 150hp. Could anyone walk me through, how to test alarm buzzer on my motor in case if low oil or overheat? My friend told me if I turn key on position ( not start motor) I should hear a beep noise, but I never heard any noise , just wonder is my buzzer working. Thanks in advance
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Old 06-13-2010, 01:05 PM   #2
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Single engine Yamaha's do not emit a tone when the key is turned to the on position. To hear the warning horn, pull the safety lanyard. When the key is turned to the start postion the horn will sound.
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Old 06-13-2010, 01:19 PM   #3
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Thanks
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Old 06-13-2010, 05:03 PM   #4
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Originally Posted by jethro1 View Post
Single engine Yamaha's do not emit a tone when the key is turned to the on position. To hear the warning horn, pull the safety lanyard. When the key is turned to the start postion the horn will sound.
Jethro is absolutely right. Great feature on the Yams. It lets you know the kill switch is off so you don't keep trying to crank the motor and run the battery down. Better yet would be if it didn't let the starter engage if it wasn't hooked up
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Old 06-13-2010, 05:43 PM   #5
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I'd go a step further and pull the temp sensor out and hold a lighter to it. I lost an engine because the rebuilder didn't check it and 2 -3 months later a bolt or 3 came out of the rebuilt powerhead and the motor melted 30miles out. He gave me a sensor after confirming it was bad but refused to do any further repair.
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Old 06-13-2010, 06:33 PM   #6
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Better yet would be if it didn't let the starter engage if it wasn't hooked up
Parrot

Kinda disagree with that last part of your statement. My motor, like many, will crank with lanyard disconnected and I find it pretty handy. For a bunch of maintenance and diagnostic chores, it really helps to be able to crank the engine without it being able to start. JMO
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Old 06-13-2010, 07:15 PM   #7
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I'd go a step further and pull the temp sensor out and hold a lighter to it. I lost an engine because the rebuilder didn't check it and 2 -3 months later a bolt or 3 came out of the rebuilt powerhead and the motor melted 30miles out. He gave me a sensor after confirming it was bad but refused to do any further repair.
Good idea Tater.

You can also easily disconnect the pink and black wires going to the overtemp sensor on the head. Then, on the engine side, plug the black wire lead into the pink wire lead. The horn should sound and if it is a Yam digital tach the over temp icon should flash.

Another yearly check is for the low oil alarm. The glass sight tube can be removed and the main oil tank drained into a clean container. When the oil gets low the alarm should sound. Just turn the motor off as soon as the alarm sounds so the motor is never run without oil.

If the alarm does not sound get the system fixed.

It is also good to drain the sight tube/sump from time to time anyway.
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Old 04-24-2014, 11:51 AM   #8
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Originally Posted by jethro1 View Post
Good idea Tater.

You can also easily disconnect the pink and black wires going to the overtemp sensor on the head. Then, on the engine side, plug the black wire lead into the pink wire lead. The horn should sound and if it is a Yam digital tach the over temp icon should flash.

Another yearly check is for the low oil alarm. The glass sight tube can be removed and the main oil tank drained into a clean container. When the oil gets low the alarm should sound. Just turn the motor off as soon as the alarm sounds so the motor is never run without oil.

If the alarm does not sound get the system fixed.

It is also good to drain the sight tube/sump from time to time anyway.
This is a great test but just curious, why do it with engine running? Wouldn't it be as effective and more safe with the engine off and the ignition in the on position?
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