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I have a 2003 Mercury 60 hp four stroke EFI. Start ups good…

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I have a 2003 Mercury...
I have a 2003 Mercury 60 hp four stroke EFI. Start ups good at first. goes up to about 3100 rpm in gear, has a horn go off then has in intermittent cutting out. Back off throttle to 1500 rpm. Primer bulb is still hard. starts to cut out after a minute at 1500 rpm. still having horn. then shuts off. no codes on laptop, and when its beeping laptop cannot get a good connection.
Submitted: 1 year ago.Category: Boat
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Answered in 13 minutes by:
8/5/2017
Marine Mechanic: Charles, Marine Mechanic replied 1 year ago
Charles
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 4,907
Experience: US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
Verified

Hello, my name is***** will assist you.

Would you please post the serial number of the engine?

Which scanner are you using?

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Customer reply replied 1 year ago
S/n- 0t730501
Cdi m.e.d.s scanner
Marine Mechanic: Charles, Marine Mechanic replied 1 year ago

This is a beeping tone and not a solid horn correct?

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Customer reply replied 1 year ago
It is not solid. No over heat or low oil.
Marine Mechanic: Charles, Marine Mechanic replied 1 year ago

When the engine stalls, what do you need to do to get it to restart?

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Customer reply replied 1 year ago
Nothing just turn the key
Marine Mechanic: Charles, Marine Mechanic replied 1 year ago

Check on the left side of the engine and see if there is a fuse in the red wires going to the voltage regulator. Make sure that it is good.

With the horn sounding and you getting RPM reduction, there is a code going off, just your scanner is not able to pick it up.

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Customer reply replied 1 year ago
Its like the key is being shut off for a split second then turning back on.
Customer reply replied 1 year ago
Checked the fuse. Its still good
Marine Mechanic: Charles, Marine Mechanic replied 1 year ago

With the engine off, it you connect the scanner and provide power to the connections on it, look at fault history, is there anything shown there at all?

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Charles, Marine Mechanic
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