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31pickemup · 12-29-2014, 11:15 PM

I just pulled my flathead and it ended up being a 1941-42 that has a 3 3/16 bore but it's not a mercury. Is there still life in her? How much can you go on that year a motor and be safe?

12-29-2014, 11:15 PM	#204
31pickemup Senior Member Join Date: Sep 2010 Posts: 417	Re: Boring a flathead I just pulled my flathead and it ended up being a 1941-42 that has a 3 3/16 bore but it's not a mercury. Is there still life in her? How much can you go on that year a motor and be safe?