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This says mariner but it is a OMC part number 012011What is the pitch on the prop you have? Ideally you want to achieve proper WOT rpm with the boat loaded.
http://www.ebay.com/itm/Michigan-Ma...ash=item25d645672b:g:z1oAAMXQ56ZR9wt7&vxp=mtr
A 10 pitch should be good for a 14ft skiff.