Swaping Powerheads on 200 2.5L Mercury

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windknotnc

Seaman Apprentice
Joined
Apr 11, 2004
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I have a Mercury 1993 2.5L with a great powerhead but a very poor midsection. I have access to a 2005 Mercury 200 2.5L Optimax with a blown powerhead. Will the powerhead from the 1993 bolt onto the 2005 and will the cowling go on it without any problems?
 
Faztbullet

Faztbullet

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Mar 2, 2008
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15,620
Re: Swaping Powerheads on 200 2.5L Mercury

The 200 DFI engines are 3.0 liters not 2.5. The optimax in 2.5 liter was the 135,150 and 175.
 
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windknotnc

Seaman Apprentice
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Messages
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Re: Swaping Powerheads on 200 2.5L Mercury

Were any of the 200's carburated? I didn't think this engine was DFI.
 
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Chris1956

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Mar 25, 2004
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27,158
Re: Swaping Powerheads on 200 2.5L Mercury

Fazt is pointing out that the Optimax cannot be a 2.5l 200HP motor. You likely need to find out exactly what the Optimax is and ask again.
 
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windknotnc

Seaman Apprentice
Joined
Apr 11, 2004
Messages
45
Re: Swaping Powerheads on 200 2.5L Mercury

I am correcting my post. It is not an Optimax but just a 2005 200hp Saltwater Mercury. My local marina tells me it should bolt up with no problem as the change from 2.4L to 2.5 L occured in 1991. Any feedback on whether the cowling will fit?
 
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