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First run after 10 properly stored. Idled fine for 15 min
First run after 10 properly stored. Idled fine for 15 min thru chanels. Pushed to 3/4 throttle ran for about 3 min then shut down. Off. Restarted and idled for 2min then pust to 3/4 throttle again. En… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
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
I have a 2000 150 hp sea pro. I have replace the coil packs,
I have a 2000 Johnson 150 hp sea pro. I have replace the coil packs, rebuilt the carburetors, new water pump, plugs, plug wires and new fuel pumps. It was running really well for the past 2 months. Th… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
My 2004 115 hp Mercury Optimax has a continuous beep when it
My 2004 115 hp Mercury Optimax has a continuous beep when it reaches around 3000 rpms. I put the motor in neutral and stop the motor then restart the motor and everything is good. I can go all day unt… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
I have a Mercury 250 efi that was in storage yrs. I decided
I have a Mercury 250 efi that was in storage for 4 yrs. I decided to get it running again so cleaned out fuel system, replaced injector pump and hoses, had injectors cleaned, replaced spark plugs and … read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
I've got a Mercury 135 HP . I run the outboard 2-3
I've got a Mercury 135 HP . I run the outboard for about 2-3 hours at 4000 RPM ,then a alarm will sound . Its start of as a short beeps then one long constant beep and then the RPM will drop to ideal,… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
2,714 satisfied customers
My 2007 90 hp optimax i was just going 32mph then it just dropped
My 2007 90 hp optimax i was just going 32mph then it just dropped down to 7mph and wont go any faster… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
Mercury Optimax: check engine warning light and warning horn
check engine warning light and warning horn both activated on my 1998 Mercury Optimax 135 Hp outboard 2 stroke engine. Manual says when both indicators occur, the problem is in the Throttle Sensor. Wh… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have a 2000 200 hp mercury efi it started to lose rpm when
I have a 2000 200 hp mercury efi it started to lose rpm when i run it up at 4000 rpm . We put a fuel pressure gauge on the fuel pump tank and the pressure drops down and goes right back up .just befor… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
I have a inboard jet Mercury optimax 215 hp for a sugarsand
hi i have a inboard jet Mercury optimax 215 hp for a sugarsand boat it beeps when i push the throttle full blast and won't shut off unless i stop the motor and turn it off. do you know what is wrong. … read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 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
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.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have a 2002 150hp Mercury Optimax which starts fine. When
I have a 2002 150hp Mercury Optimax which starts fine. When at idle or in gear, as I advance the throttle and the engine shuts off. There is no warning horn. I restart, slowly advance the throttle, th… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have a 115 hp optimax that the engine guardian system has
I have a 115 hp optimax that the engine guardian system has been activated. Slowing down the throttle speed the horn will turn off. What will cause this and how hard is it to fix. The boat and moter w… read more
Jeremy R.
Jeremy R.
MarineTechnician
9,023 satisfied customers
HI, have a 1999 johnson 60hp motor. starts fine, runs fine
HI, have a 1999 johnson 60hp motor. starts fine, runs fine full throttle until i slow down, then it won't go above 2400 rpms, tilt motor up out of water, rpms jump to 4800, tilt back down into water, … read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have a 150hp 2007 Mercury Verado Engine. It has been fantastic
I have a 150hp 2007 Mercury Verado Engine. It has been fantastic to date, but recently I noticed is running about 600 rpm lower on the top end. I did not have a warning signal (6 second continuous or … read more
Larry B.
Larry B.
Marine Service Tech
High School or GED
574 satisfied customers
Hi, I have a 2004 Mercury 115hp 4-stroke EFI outboard, when
Hi, I have a 2004 Mercury 115hp 4-stroke EFI outboard, when i rev the engine on neutral sounds fine and will rev up till rev limiter, but in gear or under load, it will start bogging past 3500 rpm and… read more
TOM
TOM
Vocational, Technical or Trade Scho
196 satisfied customers
I have a 2004 Mercury Optimax 135 HP Very low hrs. Why am I
I have a 2004 Mercury Optimax 135 HP Very low hrs. Why am I having trouble keeping water pumps in this engine. Dealer says it's normal for this model ?… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 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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