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I have a 2003 optimax 150 wont idle, I put in octane gas in
Hello I have a 2003 optimax 150 wont idle , I put in hi octane gas in the spring and in turned for the worst only way to get started was to put the throttle in cold start . its at a mercury dealer now… read more
Charles
Charles
Certified Mercury Tech
5,079 satisfied customers
1996 150 optimax. System fault say check engine sensor?
1996 150 optimax. System fault say check engine sensor? … read more
Charles
Charles
Certified Mercury Tech
5,079 satisfied customers
I have a 2007 Mercury Verado 150 hp 4 stroke that is hard to
I have a 2007 Mercury Verado 150 hp 4 stroke that is hard to start. It takes several cranks before it fires up and it missing a low speeds. The motor also starts to stall out after I back the motor do… read more
Charles
Charles
Certified Mercury Tech
5,079 satisfied customers
It seems when I go to reverse it doesn't engage all the way.
it seems when I go to reverse it doesn't engage all the way. forward operates fine. … read more
Jason
Jason
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Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a Mercury 250 Optimax with hot foot. When coming back
I have a Mercury 250 Optimax with hot foot. When coming back to the ramp or slowing down, the engine speed will not decrease as it should, it continues to idle about 1500 rpms. It causes problems gett… read more
Jason
Jason
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Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a rough/hard shift on my 1985 mercury black max, 150hp,
I have a rough/hard shift on my 1985 mercury black max, 150hp, v6. It goes into reverse just fine but only shifts into forward if I quickly put it into neutral then give it a lot of gas and it only do… read more
Charles
Charles
Certified Mercury Tech
5,079 satisfied customers
I have a 1999 150hp Mercury Optimax that discharges unburnt
I have a 1999 150hp Mercury Optimax that discharges unburnt fuel/oil mix out of the exhaust. I've checked the diaphragms in the fuel rails and found none of them to be cracked. I'm not sure where the … read more
Charles
Charles
Certified Mercury Tech
5,079 satisfied customers
I have boat i am trying to sell with johnson 150hp optimax
I have boat i am trying to sell with johnson 150hp optimax in the late 90s outboard but everybody tells me that is bad motor they had a lot trouble with them is this true?… read more
Jason
Jason
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Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a 74 mercury 150hp motor and the trim came up and wont
I have a 74 mercury 150hp motor and the trim came up and wont go back down the trim is stuck is there anyway to release the hydraulic cylinders… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
i am buying a 2005 Boston whaler with 150hp Optimax Mercury
i am buying a 2005 Boston whaler with 150hp Optimax Mercury motors any feed back re motors… read more
KKassel
KKassel
OWNER
High School or GED
381 satisfied customers
Mercury optimax i have a 2010 150hp mercury optimax, on a
i have a 2010 150hp mercury optimax, on a 2010 Trition bass boat i want to install a water pressure gauge in boat where do i hook up poly line on engine… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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I have Mercury Optimax 2000 150HP motors and the tach on one
I have Mercury Optimax 2000 150HP motors and the tach on one does not work. I swapped the tachs and it works on other motor so it is not the tach itself. Before it died, tach would sometimes work when… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
I have a 2002 150hp Mercury Optimax. It sputters as I run
I have a 2002 150hp Mercury Optimax. It sputters as I run it at all speeds. I just had the spark plugs replaced, the fuel filter replaced, the water pump replaced. The temp gauge says it idols at arou… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
i have a 1998 mercury optimax 150hp. the motor has a problem
i have a 1998 mercury optimax 150hp. the motor has a problem when you go higher than 3000rpm's in the water it strats to shake and bounce. we changed the fuel, fuel primer, fuel pump, spark plugs, air… read more
Mechman45
Mechman45
Vocational, Technical or Trade School
152 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
I have a 2003 Mercury Optimax Jet 250 inboard. I pushed too
I have a 2003 Mercury Optimax Jet 250 inboard. I pushed too hard on the Throttle the governor popped and I was able to fix that. However, now when the boat is in neutral it is moving forward because t… read more
Larry B.
Larry B.
Marine Service Tech
High School or GED
574 satisfied customers
Hello, I have 2000 Mercury Optimax 150hp (twin outboards) ...
Hello, I have 2000 Mercury Optimax 150hp (twin outboards) and I''m having intermittent problems when trying to go fast. They are fine up to 1500 RPMs, but higher is intermittent, total loss of power s… read more
Yachtwork
Yachtwork
Owner Team Yachtwork
Technical or Trade School
1,048 satisfied customers
I believe that I have water in my fuel water canister in my ...
I believe that I have water in my fuel water canister in my 1999 150 mercury optimax because I have an alarm that sounds 4 times then pasuses a few minutes and continues the fuel light comes on as wel… read more
JUST-IN-TIME
JUST-IN-TIME
CERTIFIED MARINE/PWC TECHNICIAN
Vocational, Technical or Trade Scho
74 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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