90s mercury 2.5 200hp cylinder head interchange

Gamblerman

Petty Officer 3rd Class
Joined
Jan 18, 2008
Messages
75
Long story short. I have a 1993 xri 2.5 200hp
that has a bad cylinder head from piston ring damage
but I have a cylinder head from another powerhead that is a 1990 2.5 200 non xri with a different casting number
if you put them side by side there is not much of a difference. Is this do able or do I have to have the same casting number
from the same year and type powerhead
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,616
Need to use same casting as chamber cc's and dowel pin locations differ...
 
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