Yamaha is a household name in the boat market, and their Outboard Lower Unit (OLU) is one of its most popular products. The OLU offers many features that make it a valuable asset for any boat, and it's easy to find someone who owns one. Whether you're looking to buy a new OLU or upgrade an old one, we've got the perfect guide. What is the Yamaha Outboard Lower Unit? The Yamaha outboard lower...