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tubman · 03-07-2021, 12:18 PM

From the pictures posted, the O/P is referring to the later (1949-1953) engines.

'49-'51 Mercury 255 ci 6.8:1 compression 110 hp. '53-'53 Mercury 255 ci 7.2:1 compression 125 hp.

03-07-2021, 12:18 PM	#8
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,316	Re: Mercury Motor I.D. From the pictures posted, the O/P is referring to the later (1949-1953) engines. '49-'51 Mercury 255 ci 6.8:1 compression 110 hp. '53-'53 Mercury 255 ci 7.2:1 compression 125 hp.