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When throttling up the engine starts bogging down and will
when throttling up the engine starts bogging down and will finally go back to idle … read more
Charles
Charles
Certified Mercury Tech
5,523 satisfied customers
When throttle up a alarm sounds and boat will just move a 3
When throttle up a alarm sounds and boat will just move a 3 mph . When throttle back down alarm stops and idle seems fine ? … read more
Charles
Charles
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1999 Mercury optimax has air in the fuel rail and low air
1999 Mercury optimax has air in the fuel rail and low air pressure motor will not run … read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a 2005 optimax 225 is there a soft mode built into
Dear sir I have a 2005 optimax 225 is there a soft mode built into the lower unit in neutral the prop and gears spin freely but if you ingage the gears boat will not move forward or reverse… read more
Tan
Tan
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Certified Marine Technician
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Have a 2004 225 optimax on a 2000 pathfinder. Made a very
Have a 2004 225 optimax on a 2000 pathfinder. Made a very sharp turn and motor bogged down to running on what sounded like 3 cylinders at 1640 rpm. Increase in throttle changed nothing. After running … read more
Charles
Charles
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I changed the in line fuel filter and the the filter/water
I changed the in line fuel filter and the the filter/water separator and still having the issue. To expand on the issue, during my test drive after changing the filters I noticed that when the motor l… read more
Tan
Tan
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Certified Marine Technician
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I have a Mercury optimax 225. Max RPM is 1900 in forward but
I have a Mercury optimax 225. Max RPM is 1900 in forward but will go to 4K+ in reverse. Had the wiring harness replaced last year. Ran great all fall into December. Has been stored since then. Gas was… read more
Charles
Charles
Certified Mercury Tech
5,523 satisfied customers
I have a 2002 Mercury 40hp that will not idle smoothly. it
I have a 2002 Mercury 40hp that will not idle smoothly. it pops, sputters, and cuts out. It runs great once I put the power to it. I just spent $300. for my local mercury dealer to rebuild the carb, r… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a 40 hp EFI Mercury 4 stroke (2006) Once the boat is
I have a 40 hp EFI Mercury 4 stroke (2006) Once the boat is on a plane it will run for a short period of time then idle back down. I have changed the bulb, fuel filter, and installed a inline filter c… read more
Charles
Charles
Certified Mercury Tech
5,523 satisfied customers
1994 Mercury 225 bogging down past idle only in gear. In neutral
1994 Mercury 225 bogging down past idle only in gear. In neutral engine performs as advertised.… read more
James
James
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Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a mercury 35 hp motor, I was coming in from the day
I have a mercury 35 hp motor, I was coming in from the day of fishing running about 3/4 speed and decided to see what my motor had. All the sudden it was like the cable broke and it slowed down. still… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
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I have a 2005 mercury optimax 225 with a tempest 21P prop the
I have a 2005 mercury optimax 225 with a tempest 21P prop the motor is on a 2006 Lund ProV 1900. When at idle and i give it WOT for holeshot it hesitates for 3 sec and then takes off and runes perfect… read more
Jason
Jason
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Vocational, Technical or Trade School
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2007 150 Mercury optimax outboard - 4cycle - 40 hours on motor Motor
2007 150 Mercury optimax outboard - 4cycle - 40 hours on motor Motor has a miss - when throttle down - when you throttle the motor speeds up sort skips or jumps forward - took to a mechanic who put ne… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
Motor is a 2005 225 optimax. When running full throttle after
Motor is a 2005 225 optimax. When running full throttle after about half a mile the motor starts to bog down and loose rpms. Can slow down and run about 4500 rpms and its ok. I can't locate the fuel f… read more
FieldServiceTech
FieldServiceTech
Vocational, Technical or Trade Scho
146 satisfied customers
I drained the fuel tank and refueled with fresh fuel. launched
I drained the fuel tank and refueled with fresh fuel. launched it for the first time this season. Pontoon boat and 90hp Mercury Optimax are 1 1/2 years old. I've never had a lick of trouble. I squeeze… read more
Captain Dave
Captain Dave
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Master's Degree
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MY 1998 MERCURY 225EFI ON A RANGER 519SVS HAS ALWAYS HAD A
MY 1998 MERCURY 225EFI ON A RANGER 519SVS HAS ALWAYS HAD A ROUGH TAKE OFF UNTIL IT REACHES 2500 RPM. ALWAYS IDLES GREAT AND ALWAYS RUNS GOOD AT 2500 TO 5200 RPM. IS SOMETHING WRONG OR JUST THE NATURE … read more
Larry B.
Larry B.
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High School or GED
574 satisfied customers
I have a trophy 2103 with a mercury 225 optimax. When i go
I have a trophy 2103 with a mercury 225 optimax. When i go to put it in forward, i have to push the throttle all most 3 quarters of the way up before it will engage. Reverse works fine. What do i do.… read more
Yachtwork
Yachtwork
Owner Team Yachtwork
Technical or Trade School
1,048 satisfied customers
2001 mercury 225 optimax set powering aCustomer, starboard
2001 mercury 225 optimax set powering aCustomer, starboard enging wont power up past 3750 rpm full throttle. port 4900, neutral they both redline just not under a load… read more
Larry B.
Larry B.
Marine Service Tech
High School or GED
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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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