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Noel, my brother has the 75hp Optimax and tried my 115
Noel, my brother has the 75hp Optimax and tried my 115 Optimax computer. The boat started fine but with acceleration it will hit about 4500 rpm (not wide open) and start beeping and shut down. restart… read more
Charles
Charles
Certified Mercury Tech
5,070 satisfied customers
Last year before I put the boat away winter I had a new
Last year before I put the boat away for the winter I had a new tilt/trim switch put into the shifter handle. The marine mechanic told me that he had to adjust the cables in the shifter. This past spr… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a 2001 90 hp mercury 2 stroke. Low hour, fresh water
John, I have a 2001 90 hp mercury 2 stroke. Low hour, fresh water engine. While running boat one day I started losing power and had to push throttle wide open to maintain 4000 rpms and keep boat on pl… read more
Charles
Charles
Certified Mercury Tech
5,070 satisfied customers
I have a 2006 searay with 6.2 mpi The port motor only comes
I have a 2006 searay with 6.2 mpi The port motor only comes up to 4500 rpm Throttle feels dead compared to starboard which revs to 5000 rpm and is Much stronger. Just had a valve job and head gasket r… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,739 satisfied customers
I have a year 2000 125HP mercury outboard. Serial #:0t088785.
I have a year 2000 125HP mercury outboard. Serial #:0t088785. Engine idles fine and runs well but tops out at 4500 RPM. It should get to 5000-5250 RPM. I rebuilt carbs, replaced fuel line, replaced fu… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,638 satisfied customers
I have a 2004 Monark Fish/Ski boat with a 2005 Mercury 115
I have a 2004 Monark Fish/Ski boat with a 2005 Mercury 115 Optimax on it. This is the first season I have owned this boat and have never taken it out on the water prior to this trip. I had taken it ou… read more
Charles
Charles
Certified Mercury Tech
5,070 satisfied customers
i have a 1996 Mercury 3.0 efi that bogs down when i accellerate.
i have a 1996 Mercury 3.0 efi that bogs down when i accellerate. i have had it a few months and the motor runs fine at idle and once it catches itself and planes the boat out and runs fine it will bog… read more
Malta Tech
Malta Tech
Marine Tech
High School or GED
287 satisfied customers
2002 mercury 125hp 2+2 gets up on plane, then starts surging,
2002 mercury 125hp 2+2 gets up on plane, then starts surging, like starving for fuel. This lasts about 5 minutes, then runs well after it warms up.… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,638 satisfied customers
I have a 17.5 Lund Tyee (rated to 140 hp) and I fish Lake
I have a 17.5' Lund Tyee (rated to 140 hp) and I fish Lake of the Woods in northern MN & Canada with 4 adults in the boat. Mercury makes 115, 125 & 135 hp Optimax motors. Other than the small differen… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a Mercury 50 HP outboard motor on a 16 ft boat. It idles
I have a Mercury 50 HP outboard motor on a 16 ft boat. It idles at 1100 RPM and is very smooth. When I give it the gas it seems to labor and take for ever to plane out. It tops out at 4500 RPM. I put … read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
1987 25 hp yamaha misfires at approx 3500 rpm as boat is coming
1987 25 hp yamaha misfires at approx 3500 rpm as boat is coming onto plane . then seems to pick up as boat gets on top of water. does not misfire at top speed… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 115 HP strait six Mercury outboard . carbs (3 each)
I have a 115 HP strait six Mercury outboard . carbs (3 each) were rebuilt last year, new plugs , clean gas. hard starting will not want to go and get up on plane most of time. But when I am successful… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 2003 Mercury 90 hp motor that runs fine until you
I have a 2003 Mercury 90 hp motor that runs fine until you reach 4300 to 4500 rpm's then it's like you shut the switch off but if you pull the throttle back to around 3500 rpm's it take right off and … read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,729 satisfied customers
I have a 1998 evinrude 90 hp spl that i have recently
I have a 1998 evinrude 90 hp spl that i have recently purchased. for a back ground for me; i am bmw technician. as far as the boat i cleaned out tank filled with new gas/oil and took out, hard to star… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,729 satisfied customers
We have a 3800lb 24 openbow with a 350 Mag Bravo 3 26 pitch.
We have a 3800lb 24' openbow with a 350 Mag Bravo 3 26" pitch. With a medium load its a little sluggish getting up on plane. I am thinking about going to a Bravo 3 XR 25" pitch. Do you think this will… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I want to buy a tach for my 1997 yamaha 2 stroke 2 cylinder
I want to buy a tach for my 1997 yamaha 2 stroke 2 cylinder 25 hp outboard model c25elrv. I can find tachs that will fit 4/6/10/12 pole motors. How many poles is my motor? What should my wide open thr… read more
Larry B.
Larry B.
Marine Service Tech
High School or GED
574 satisfied customers
i have a 23 cabin cruiser with a 225 volvo powered by a 305
i have a 23' cabin cruiser with a 225 volvo powered by a 305 chevy i can not get up on plain without using trim tabs. could this be a prop problem or shoud i consider fins… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
i just asked a question about a 70 hp got 1 more. would you
i just asked a question about a 70 hp got 1 more. would you have any ideal what size prop i might need. the boat is a 1989 tracker pro deep v 16. before it started having trouble i had a 17p x 13 3/4 … read more
TOM
TOM
Vocational, Technical or Trade Scho
196 satisfied customers
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Dominick

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Tan

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Jeff G.

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Captain Dave

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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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