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Jan 23rd, 2013
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Motor in limp mode 2013 Merc 90 optimax #13289987 09/22/19 09:30 PM
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JSouther Offline OP
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Help......boat in limp mode with intermittent beep. Manual shows cooling or oil problem. Oil tank is full and flushed motor several times and is spitting water. Decided to change spark plugs fuel filter, air filter cleaned manual lift pump and tested high and low fuel pump. Cleaned injectors still same thing. Rough idle won’t go over 2500rpm and beep still there. I think might be bad sensor or something. Any ideas? Can a bad battery cause this? Boat currently at shop to get plugged up to computer but they are two weeks out.

Re: Motor in limp mode 2013 Merc 90 optimax [Re: JSouther] #13290317 09/23/19 03:45 AM
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dobbin Offline
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Good idea caring the boat to the shop to get it checked. Hate to spend the $$$$ myself but could save you in the end...


Champion Jigs
Re: Motor in limp mode 2013 Merc 90 optimax [Re: JSouther] #13290733 09/23/19 05:38 PM
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T-racer @ Mallard Marine Offline
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A tech with a computer will help a lot. Yes, it very well could be a sensor! Computer will help pinpoint what it is that's yelling at you. They'll go from there.


Mallard Marine Nacogdoches, Tx
936-225-3244 - Authorized Merc Sales/Service
Allison XB2003 - 300X
Re: Motor in limp mode 2013 Merc 90 optimax [Re: JSouther] #13291201 09/24/19 01:26 AM
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gary purdy Offline
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Bad oil tank float.


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
Re: Motor in limp mode 2013 Merc 90 optimax [Re: JSouther] #13291312 09/24/19 02:47 AM
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JSouther Offline OP
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Thx Gary I will check that next. If I get a new tank and put it on will the beep stop and run fine or does it have to be reset by computer.

Re: Motor in limp mode 2013 Merc 90 optimax [Re: JSouther] #13296998 09/30/19 02:25 AM
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JSouther Offline OP
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So boat shop called and said it is #3 injector failure and significant amount of water in fuel. Is there a place around Fort Worth that I can take fuel and air injectors to clean and calibrate. What is a decent price for this?

Re: Motor in limp mode 2013 Merc 90 optimax [Re: JSouther] #13299096 10/02/19 12:56 AM
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Might try mark Gunter 817626-5693. Works out of his house shop located west of axle. Master mercury tech

Re: Motor in limp mode 2013 Merc 90 optimax [Re: JSouther] #13299229 10/02/19 03:08 AM
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Matt M Offline
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Originally Posted by JSouther
So boat shop called and said it is #3 injector failure and significant amount of water in fuel. Is there a place around Fort Worth that I can take fuel and air injectors to clean and calibrate. What is a decent price for this?

I use a guy in Arlington to clean all my fuel and air injectors

John Mosati (817) 658-7721


Matts Marine Service
903-450-3539
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