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Need Help - Mercury 250 HP optimax

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I have a Mercury 250 HP optimax that is about 10 years old. It has been cared for and serviced regularly and does not have high hours.

 

I just replaced the fuel filters.

 

The engine runs fine at low speed up to about 1800 or 2000 RPM. When I try to speed up it will not go to any higher RPM and the motor sounds very "luggy" at that point.

 

Any ideas are greatly needed and will be appreciated.

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make sure the fuel line around the filters is not kinked.

 

is one of the filters installed backwards, some fuel filters are directional.

 

def sounds like a fuel delivery problem.

Material abundance without character is the path of destruction.
-Thomas Jefferson
There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.
-Soren Kierkegaard

 

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Yikes.. its an optimax.

 

Your not getting any alarms?

Mine screams at me all the time .I have constant over heating problems 2002 135 hp optimax. 200 hrs.

The slowing is the guardian system built into them. Keeps you from doing more damage. Really nice. But the coolant issue i have is never ending. Third mechanic working on it tomorrow. mad.gifwaaah.gif

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  • 1 year later...

"about 10 yrs old", do you know the year? Have you had any of the updates done? 99-01 opti's are known as opti-kabooms, because of some issues they had. If they have not had the updates, I would do them. Opti's should last many thousands of hours, and 10 yrs should not be in the condition to only get a "last year" out of it.

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