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Hot engine alarm on my 1998 115 hp mercury outboard as soon as you turn the key on the alarm comes on and does not stop until you turn the key off ?

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rilaxson

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Alarm is also for low oil but cold be faulty relay unit for alarm.connect heat sender wire straight to alarm and just make sure you always have oil in autolube

Posted on May 13, 2014

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Anonymous

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SOURCE: Hi,I am looking for an online manual for an 85 hp mercury outboar

i have service manual for MERCURY IN LINE 75-150 HP-it covers all however my scanner printer down at present so unable to scan to lappy to be able to email at prez-hopefully this week-waiting on my computer man!

Posted on Oct 15, 2009

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2006 mercury outboard opti max 200 engine alarm, (4 beeps). oil was run low, do i need to prime the system or should it prime itself?


The low oil sensor is not "seeing" the oil in the tank...(mine does this when I crank it,, the low oil light stays on).. It uses plenty of oil,,I quit worrying..- -don't feel like taking the oil system apart..
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Is this a two stroke?-If it is you most likely have a primary seal going bad (crankcase seal on the ignition side will lean it out,leaking seal on the other-side of assembly will do just what your describing)Hope this helps you out.....

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1 Answer

Why does my 1991 60 hp Evinrude outboard alarm sound and motor sputter occasionally?


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1 Answer

Mercury outboard problems


The alarm is the overheat horn. It means that your motor isn't pumping water from the bottom of the leg and through the engine cooling ports. You will see water shooting out the side of the motor when it starts getting hot, and if you're not seeing the water shoot out and the horn is on then chances are the pump impeller on the leg is shot. You should never start a boat motor (outboard or any other type of boat motor) without having it sitting in the water or with a water calliper with a garden hose attached on the lower inlets of the leg. If you run it without water you will melt the rubber impeller and damage the engine if it's run too long without water cooling. Take it in to a qualified tech to replace the impeller.

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Smoke coming out of bottom carb on mercury 50hp outboard engine


It's possible that a little fuel vapour come out of a carb on an hot engine that has just stopped.
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