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I have Merc 350 and the alarm started the 2 beep every 60

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seconds while underway and then...
I have Merc 350 and the alarm started the 2 beep every 60 seconds while underway and then when I slowed down the engine cut out and the alarm came on.
Submitted: 2 years ago.Category: Boat
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Answered in 6 hours by:
8/23/2015
Marine Mechanic: Michael, Master Mechanic replied 2 years ago
Michael
Michael, Master Mechanic
Category: Boat
Satisfied Customers: 257
Experience: Over 25 years experience working on everything from PWC's to Mega Yachts
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Hi my name is Mike,

Two beeps every minute on your motor means you have a sensor failure... this could be one of a few sensors on the motor. The only way to know for sure is to plug it into a diagnostic scanner. The good ones are very expensive so unless you plan on doing all the diagnostic work on your boat it would be more practical to get it to a MerCruiser dealer. If you are somewhat mechanically inclined you could just ask them to scan it and tell you which sensor it is and replace it yourself.

I hope this helps as it is all I can do for you without being there with my scanner. Let me know if you have anymore questions and I would be glad to assist.

Mike

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Customer reply replied 2 years ago
Which scanner do recommend?
Marine Mechanic: Michael, Master Mechanic replied 2 years ago

For your purpose I might recommend trying the one from Sierra. It's designed for marine engines and although I haven't tried it myself, I have heard that it works well. The reason the motor cut out and died is because one of the engine's sensors is failing and sending a bead signal to the ECM and confusing it.

I use a professional diagnostic software with a special laptop but it costs over $3500. The sierra one is inexpensive and will give you a code that you can look up to see which sensor failed.

I hope this helps, If you feel my answer was helpful please don't forget to use the rating system to except my answer as this is how we are credited for our time.

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Marine Mechanic: Michael, Master Mechanic replied 2 years ago

sorry, here is the link to the Sierra scanner tool..

http://www.explosivepowersports.com/sierra-mercruiser-mefi-diagnostic-cable-18-adc424/?gclid=CjwKEAjw3uWuBRD_s-3a8-_h6j0SJAC-qgtHvCxcCRq4fsrU3liQH4sGX7iGKJhrzsAyhpSxwibJ9RoCEX7w_wcB

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Customer reply replied 2 years ago
That is the wire for the sierra scanner - the unit costs almost $5000.
Marine Mechanic: Michael, Master Mechanic replied 2 years ago
It's not the sierra it's from Craftsman.... I'm sorry.
I think the Craftsman scanner runs around $165
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Marine Mechanic: Michael, Master Mechanic replied 2 years ago
Sorry about the mix up... The Craftsman Scanner is of the less expensive style scanners and are designed primarily for automobiles but will read most obd2 systems. There is or used to be a Similar scanner made my Sierra but I could not find it.
The Code Mate code reader tool may also work for you and is only $120
Here is the link for it... scroll down toward the bottom of the page.
I hope this helps
http://www.marinepartsexpress.com/diagnostictools.html
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Michael
Michael
Michael, Master Mechanic
Category: Boat
Satisfied Customers: 257
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Experience: Over 25 years experience working on everything from PWC's to Mega Yachts

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