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I have a used Mercury Optimax 115 .. It fowls plugs a little
I have a used Mercury Optimax 115 .. It fowls plugs a little more than I think is normal.Do you think switching to synthetic 2 cycle oil would help? … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
20,685 satisfied customers
The mercury Optimax 115 cut out while running. Now it won't
Hi. The mercury Optimax 115 cut out while running. Now it won't start. I turn the key and the fuel pump buzzes for a few seconds but that's it can you help? … read more
Charles
Charles
Certified Mercury Tech
5,637 satisfied customers
Compressor on my 2006 115 mercury optimax quit pumping. The
compressor on my 2006 115 mercury optimax quit pumping. The piston looks OK, would the reed valves cause the chirping and cause the problem?. … read more
Charles
Charles
Certified Mercury Tech
5,637 satisfied customers
I've got a 2006 Optimax 115 1B241431 that has an analog
Hey, I've got a 2006 Optimax 115 1B241431 that has an analog water pressure gauge, I have the hose in the cowling that runs to the gauge but can seem to find where it hooks up exactly, an idea?… read more
Charles
Charles
Certified Mercury Tech
5,637 satisfied customers
I have a Yamaha F115 on a Lund ProV boat. the trim gauge
I have a Yamaha F115 on a Lund ProV boat. the trim gauge only goes from down and when I lift the motor it only goes up about 1/4 of the way. … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
20,685 satisfied customers
I have 2006 optimax my sensor beeps 4 times every 2 minutes
i have 2006 optimax my sensor beeps 4 times every 2 minutes and will not quite i fillled oil drained fuel new filter and still continues to beep every 2 minutes ?… read more
Charles
Charles
Certified Mercury Tech
5,637 satisfied customers
What is the difference from Mercury 90HP with jet pump on a
what is the difference from Mercury 90HP with jet pump on a Lowe 1860 Tunnel jet and putting on a 115HP… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
20,685 satisfied customers
I will buy a new boat and engine soon. I have a 1994 Force
I will buy a new boat and engine soon. I have a 1994 Force which performs adequately. The dealer said I would be happy with the Merc. 115 four stroke. I am concerned about starting power to snatch a s… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
20,685 satisfied customers
Hi Jason I have a 2008 150 optimax that stalls underload when
Hi Jason I have a 2008 150 optimax that stalls underload when in gear but will clear up when you run it wot then bring it back to idle again . But if you leave it about 15-20 minutes at idle it will b… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
20,685 satisfied customers
Having problems with a 2006 115 mercury out board four stroke
Having problems with a 2006 115 mercury out board four stroke on pontoon boat. Will not reach max rpm and it then reves up by its self. Is a buzzing under the dash. Only had boat since April . Did not… read more
Charles
Charles
Certified Mercury Tech
5,637 satisfied customers
1999 johnson 50hp, keeps blowing main fuse under cowl anytime
1999 johnson 50hp, keeps blowing main fuse under cowl anytime I run trim for more than 3 seconds. checked all the out in the open wires and connections for looseness as well as replace battery as it w… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
I was coming in the other day and the 150 optimax gave me
I was coming in the other day and the 150 optimax gave me 4 alarm beeps. Looked it up the manual and 4 alarm beeps every 2 minutes means : 1) Fuel filter has water in it. 2) Oil cap has a crack in oil… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I own a 2005 Mercury 115 Optimax with less than 90 hours on
I own a 2005 Mercury 115 Optimax with less than 90 hours on the motor.On a recent fishing trip the motor quit while going across the water. When I restarted it there was a distinct knock in the motor.… read more
Charles
Charles
Certified Mercury Tech
5,637 satisfied customers
I am looking at purchasing a second hand 2007 160 Boston Whaler
I am looking at purchasing a second hand 2007 160 Boston Whaler with a 2009 130 Hp Evinrude Etec motor. Please can you let me know the weight of this motor as i am concerned it may be to heavy for the… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,891 satisfied customers
I bought a 2011 boat with a 115 4cycl merc. the trim went out
I bought a 2011 boat with a 115 4cycl merc. the trim went out the first month. took it back to bass pro, put it in this year and it worked the first day. second time out, the same thing happened. the … read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 2002 seadoo with a 250 Optimax jet drive motor Mercury.
I have a 2002 seadoo with a 250 Optimax jet drive motor Mercury. I just bought this in June. First time using the boat I experienced trouble with the motor stalling while running. I would wait 15-20 m… read more
Conservative
Conservative
Service Advisor
Vocational, Technical or Trade Scho
154 satisfied customers
Mercury 115 Optimax I have 08 Optimax 115, when I am driving
I have 08 Optimax 115, when I am driving (at any RPM) and use the power trim the engine loses 200-500 RPM like and electrical short. this is the only time that it occurs, both on trim up and down. Thi… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 2006 Merc 90 hp optimax. when I first run the boat
I have a 2006 Merc 90 hp optimax. when I first run the boat i will run great for about 5 - 10 minutes at 3500 rpms. Then the engineen start to stall out, if I back down the throttle it will idle fine … read more
Outboard Guy
Outboard Guy
Vocational, Technical or Trade Scho
66 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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