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1996 150 optimax. System fault say check engine sensor?
1996 150 optimax. System fault say check engine sensor? … read more
Charles
Charles
Certified Mercury Tech
5,066 satisfied customers
I have a 2000 Mercury Optimax 115. Over the years, I've
I have a 2000 Mercury Optimax 115. Over the years, I've experienced the notorious over heating problems this motor is known for and many others as well. It's been so bad that no one in the family has … read more
Charles
Charles
Certified Mercury Tech
5,066 satisfied customers
I have a 2001 Mercury Optimax 135 and recently took it in
I have a 2001 Mercury Optimax 135 and recently took it in for some repairs on the cooling system. The engine ran great except for the fact that I was getting 4 beeps every couple minutes. I checked th… read more
Charles
Charles
Certified Mercury Tech
5,066 satisfied customers
Engine is a 150 optimax. Engine is performing fine .... But
Engine is a 150 optimax . Engine is performing fine .... But while idle or running out I get 4 beeps about every 5 min . Check water pressure , at idle 7 lbs running about 15 lbs , all other gauges re… read more
Charles
Charles
Certified Mercury Tech
5,066 satisfied customers
I have a 2003 135 hp Optimax ser # ***** Recently a Smartcraft
I have a 2003 135 hp Optimax ser # ***** Recently a Smartcraft (ver 3.04) gauge and CAN harness (Part # *****) were added. The correct end of the CAn is pluged into the motor. The Smartcraft gauge, up… read more
Charles
Charles
Certified Mercury Tech
5,066 satisfied customers
I have a 150 OptiMax 2008 engine that has started the alarm
I have a 150 OptiMax 2008 engine that has started the alarm siren when I am pulling people on an inner tube; usually when I am in a turn so there is maximum stress. I had to replace 2 coil assembly un… read more
Charles
Charles
Certified Mercury Tech
5,066 satisfied customers
Answers from Two Experts requested: I have a 2000 Merc
I have a 2000 Merc optimax DFI 150 HP Outboard. Every time I take the boat out, within approx 20 minutes at low rpm (below 1500) the smart craft gauges signal an overheat condition. Also says check pa… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,729 satisfied customers
i have a 2006 150HP mercury optimax. this morning a 4 beep
i have a 2006 150HP mercury optimax. this morning a 4 beep every two minute alarm started going off. the display flashes a fuel pump and engine. i have eliminated low oil as the issue and believe that… read more
Jason
Jason
Marine Mechanic
18,626 satisfied customers
2002 Mercury 150 hp 2 stroke keeps going into guardian mode.
2002 Mercury 150 hp 2 stroke keeps going into guardian mode. What are the typical problems associated with this? (my boss just bought a a boston whaler 180 ventura used) The former owner indicated tha… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,729 satisfied customers
2004 mercury 150 optimax. Getting false readings and alarms
2004 mercury 150 optimax. Getting false readings and alarms for no oil and overheating. engine shuts down to idle. Smartcraft display ALWAYS shows 32F for temp. and 0.0 psi for oil. Other aspects of S… read more
Charles
Charles
Certified Mercury Tech
5,066 satisfied customers
We just bought a 2006 Tahoe w/150 mercury optimax. First time
We just bought a 2006 Tahoe w/150 mercury optimax. First time on the water 10/15 mph winds. We were driving into the wind and current (the boat was not plained) maybe doing 2500/3000 rpm. An alarm cam… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,729 satisfied customers
i have a 2006 mercury optimax running in fresh water (Lake
i have a 2006 mercury optimax running in fresh water (Lake Erie) when I full throttle the engine, I get a continuous alarm. It stops if I back the throttle down, then I can slowly increase throttle. A… read more
Jason
Jason
Marine Mechanic
18,626 satisfied customers
I have a 2005 135hp optimax. The smartcraft guage was going
I have a 2005 135hp optimax. The smartcraft guage was going off with a bell icon in the top right of the guage. A mechanic sugested I change the fuel filter/water seperator which I did and it correcte… read more
Jason
Jason
Marine Mechanic
18,626 satisfied customers
Mercury 150 hp Optimax I have a 150 HP Optimax ( year 2000
I have a 150 HP Optimax ( year 2000 ) that blows the warning whistle and shows a hot light on the idle out. Yet it is not hot. If I turn the key off and then immediately restart the engine, it will id… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,729 satisfied customers
2000 Bayliner Ciera,with 7.4 MPI 310 hp. Had three bellows
2000 Bayliner Ciera,with 7.4 MPI 310 hp. Had three bellows changed with shift cable. Put boat in water to check for leaks. Started engine and within ten seconds the slarm went off. Checked td he lube … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
Mercury optimax(NNN) NNN-NNNNmodel the alarm will not shut down,
Mercury optimax(NNN) NNN-NNNNmodel the alarm will not shut down, the display shows the horn alarm, can we reset this or can we even fix it as we live on the Chatham Islands… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a Optimax 150, yesterday oil tank ran low and the warning
I have a Optimax 150, yesterday oil tank ran low and the warning busser started to sound. added oil busser continued and the shut down to 1500 RPM. What do I need to do??… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I believe that I have water in my fuel water canister in my ...
I believe that I have water in my fuel water canister in my 1999 150 mercury optimax because I have an alarm that sounds 4 times then pasuses a few minutes and continues the fuel light comes on as wel… read more
JUST-IN-TIME
JUST-IN-TIME
CERTIFIED MARINE/PWC TECHNICIAN
Vocational, Technical or Trade Scho
74 satisfied customers
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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