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The alarm sounded as soon as I started the motor. It
The alarm sounded as soon as I started the motor. It silenced in about 30 seconds. I took the boat out and it seemed ok, but as I started to throttle up it started to rev up and down and the alarm was… read more
Jason
Jason
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I am looking at swapping out one of my outboards with a
Hi I am looking at swapping out one of my outboards with a blown powerhead and have a question about compatability. The boat currently has twin 2001 225 optimax outboards on it. One option I have is t… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
2007 Mercury OptiMax 150, I have a flashing Check Engine,
2007 Mercury OptiMax 150, I have a flashing Check Engine, Oil and Alarm bell; with 4 beeps every 2 minutes … read more
Jason
Jason
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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
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I just purchased a used pontoon boat with a 2010 Mercury
I just purchased a used pontoon boat with a 2010 Mercury Verado 150 HP. First time out today. It starts easily and idles nicely, however when I bring the boat up on plane at higher RPM's, once it reac… read more
Charles
Charles
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I recently had my Mercury 90 hp optimal serviced due to
I recently had my Mercury 90 hp optimal serviced due to getting 3 beeps and shutting down. $1,175 later, fuel pump, pick ups, impellers, all replaced, I finally had a chance to get it off the trailer … read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
hi my name is ***** ***** have 150 h.p mercury optimax outboard year 2000 and the alarm be
hi my name is ***** ***** have 150 h.p mercury optimax outboard year 2000 and the alarm beep when i exceed over 2000 rpm a long beep alarm and the engine will slow the power speed… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
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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.
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Vocational, Technical or Trade Scho
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Mercury(NNN) NNN-NNNND: I have a mercury O/B 50 HP 2007. Runs great
I have a mercury O/B 50 HP 2007. Runs great for first 20 minutes in the water then drops rpm to about 2500 Rpm. after I leave it over night does same again. Have changed fuel lines. Initially stopped … read more
Jason
Jason
Marine Mechanic
22,973 satisfied customers
Mercury Optimax: My 200 hp 2006 mercury optimax revs high on
My 200 hp 2006 mercury optimax revs high on startup beeps sometimes, then idles normal for a few seconds. Then idle becomes varied before running up around 1100 rpms where it hangs. Any ideas? I think… read more
Jason
Jason
Marine Mechanic
22,973 satisfied customers
2001 Mercury 150 Optimax port engine overheats at low RPM,
2001 Mercury 150 Optimax port engine overheats at low RPM, ok at higher RPM. Replaced water pump and thermostate. Ran fine for about 20 hours. Now warning horn goes off after about 30 minutes at low s… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a 2006 Mercury 90 HP Optimax motor that has 200 hours,
I have a 2006 Mercury 90 HP Optimax motor that has 200 hours, at most, and is running fine except shuts down as I run it over 3,500 RPM. A mechanic guessed it was a bad high pressure fuel pump but nee… read more
Jason
Jason
Marine Mechanic
22,973 satisfied customers
My 2006 75 HP Mercury Optimax started sputtering while at full
My 2006 75 HP Mercury Optimax started sputtering while at full throttle on plan. The last time this happened it shut off. Started right back up and then I had an alarm sounding three of four beeps eve… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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We need to replace two evinrude 150 outboard engines on our
We need to replace two evinrude 150 outboard engines on our 26 foot seacat. WE want dependable engines that have 25 inch shafts , one engine counter-rotational, saltwater resistant in the 150 to 175hp… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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2005 merc optimax 150 hp alarm sounded at around 25oo rpms.
2005 merc optimax 150 hp alarm sounded at around 25oo rpm's. checked oil res. on engine. very low. checked large oil tank nearly full. should i fill the oil tank on engine and check if alarm sounds at… read more
Jeremy R.
Jeremy R.
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Yamaha 4 stroke 2005 150 HP. Are there any known generic problems
Yamaha 4 stroke 2005 150 HP. Are there any known generic problems with that engine or is is it fair engine to buy old. Are there significant differences to 2010 version?… read more
Jeff G.
Jeff G.
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Jeff its me again Ken from Jupiter Fl. I pulled the warranty
Jeff its me again Ken from Jupiter Fl. I pulled the warranty history on those 2001 225 Mercury Opti. that were on the 29' Donzi in Jacksonville. Their were 36 warranty issues between both motors the f… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I am looking at a 2000 bass boat with a 150 hp mercury optimax
I am looking at a 2000 bass boat with a 150 hp mercury optimax motor. I was told they had alot of problems with opimax motors. In your opinion are these motors relieable And is there more maintenance … read more
Jack
Jack
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Vocational, Technical or Trade Scho
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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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