1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 276Get this manual
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NON BIGFOOT GEAR HOUSING
a-Vise b-Screwdriver or small Punch c-Spring d-Groove Pin (Press in until Flush) e-Serrations 4 Apply 2-4-C wTeflon to cam follower (flat side) and install follow