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Well your serial number comes up as an (1992) MARINER 2.0L 150 XL Serial No: 0D167071 Model No: 7150422AD
http://www.marineengine.com/parts/mercury_marine_parts/sn/0D167071
I figured you knew what you had already or at least what the serial number would come up as when made new at the factory since your friend knew his Mercury stuff.Yeah i saw that one, but didn't they use the same blocks for all these engines from 135 to 200 back in those days?
Whats casting # on cylinder head as that will tell you if its a 2 or 2.5
Any feedback on the casting # guys?
Any confirmation on which one this is guys?