Click on the link below to view several outstanding topics on the 9.9/15hp OMC engines, all written by "The Machinist". Our thanks to him for allowing us to use his material.
http://www.leeroysramblings.com/OMC_info/OMCinfo.htm
http://www.leeroysramblings.com/OMC_info/OMCinfo.htm
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