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We have a 2006 Merc Optimax 150 that got some debris sucked
We have a 2006 Merc Optimax 150 that got some debris sucked into the cooling water system and slightly overheated idling while trolling. We've cleared the debris and replaced the water pump impeller. … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I have a mercury optimax 90hp and its giving me an alarm on
Hi I have a mercury optimax 90hp and its giving me an alarm on the smart craft " system fault no9" when im on full throtle nothing happens but when i m low rev the alarm cames out. Any idea please?… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
I have a 225 HP 2008 Mercury Optimax 2 stroke, when I go
I have a 225 HP 2008 Mercury Optimax 2 stroke, when I go past 2400 RPM, a constant alarm goes off, then engine goes into guardian mode, any suggestions on what to trouble shoot/ … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
It is in "guardian mode" i believe. It only goes about 10
It is in "guardian mode" i believe. It only goes about 10 mph and no more than 1500 rpms. It got low on oil, but I put some int it already. After I start the engine, it starts up and idols fine, but d… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
Jason. I have a 2012 Meridian 341 with 8.2 HO's. Recently I
Hi Jason. I have a 2012 Meridian 341 with 8.2 HO's. Recently I have been getting smartcraft codes like Engine/Shift fuel system and the boat has been stalling on the stb engine. Recent time boat was g… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
I have a 2005 Mercury optimax 150 that went into guardian
I have a 2005 Mercury optimax 150 that went into guardian mode because I failed to replace the cap on the oil reservoir. It checked out no problems when tested with the meter, but still seems to act l… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
I have a 2002 merc. optimax 135L DFI manufactured in July2001.
I have a 2002 merc. optimax 135L DFI manufactured in July2001. Serial# ***** It came on a 18.5 foot fiberglass pro craft fish and ski. With one passenger and myself the motor performs good. When you l… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
I have a '05 496 Merc. AT idle, cruise, random times. The motor
I have a '05 496 Merc. AT idle, cruise, random times. The motor dies momentarily. The read outs go blank and rpm's drop. All for 1 second. Alarm sounds but not long enough to read out on smartcraft. E… read more
briggs archer
briggs archer
master marine mechanic
Associate Degree
403 satisfied customers
Answers from Two Experts requested: I have a 2000 Merc optimax DFI 150 HP Outboard. Every
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
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
Got twin Merc Cruiser Bravo 5.0L 2006 engines. Today, after
Got twin Merc Cruiser Bravo 5.0L 2006 engines. Today, after being on the water for a while, started engine and the Smart Craft Monitor says Check Engine, although all appears to be functioning fine. O… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I just installed 2005 mercury optimax 250hp xs motors to
I just installed 2005 mercury optimax 250hp xs motors to replace my 2000 200 hp optimax motors and i changed over to smartcraft gauges I am getting a check engine fault horn on the smartcraft gauges ?… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have a 2001 Boston Whaler Outrage with a 2001 225 hp Optimax.
I have a 2001 Boston Whaler Outrage with a 2001 225 hp Optimax. my speedometer gauge seems to malfunction, works fine up to 20 mph and then drops to 0. Merc# XXXXX is there a replacement unit that wil… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
Hi - I have a 2008 Mercury Optimax 90HP 2 stroke. When I have
Hi - I have a 2008 Mercury Optimax 90HP 2 stroke. When I have been at low rpm then slowly accelerate an alarm sounds and the smartcraft guage tells me there is a fault..but all readings are good. If I… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I have a 2002 150HP Optimax. It alarms on overheat, constant
I have a 2002 150HP Optimax. It alarms on overheat, constant alarm, when I am coming up on plane as it reaches 4000 RPM. I've had the poppit valve replaced, therostats and water pump all done by an au… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
2,743 satisfied customers
Hi i have a 200hp optimax 2000 model and have a problem with
Hi i have a 200hp optimax 2000 model and have a problem with it we originaly thought it had water in the injectors as the warning buzzer for the filter on the engine went of last time out but after in… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
we have a 2004 merc 150 optimax that when cruising for approx
we have a 2004 merc 150 optimax that when cruising for approx 2 min will beep three times and quit. the water pump seems to be putting out a good stream of water. the smart craft screen shows the pict… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have 2008 250 mercury optimax I have a contunious beep and
I have 2008 250 mercury optimax I have a contunious beep and fault code 210 135 134 are comming up on the smart craft and sutting the engine down to under 2500 rpm Lynn sherrill [email protected]… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
200 optimax goes into guardian and does not enter problem on
200 optimax goes into guardian and does not enter problem on comp testor. Run comp test no trouble found. Problem is not consistent but I worry if distance breakdown. Trollmotor back to ramp.… read more
Jeremy R.
Jeremy R.
5,362 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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