National Geographic : 1963 Jun
New Merc 650/65 hp/4 cylinders One part on a Mere is designed to wear out * This is a trim tab. It may be adjusted with a simple hand tool to offset engine torque for easy steering. This year, it has been designed to wear out. Here's why: Up to now, outboarders using bronze pro pellers in salt water had a corrosion problem. When two unlike metals, such as bronze and aluminum, are submersed in salt water, an action is set up called galvanic corrosion. It is the reverse of plating one metal with another, causing one of the metals to be eaten away. Mercury's new trim tab is cast from a special self-sacrificing alloy. In salt water, it allows itself to be slowly "eaten away". . . thereby protecting the other metal parts of your motor. When your motor begins to steer hard, it's time to replace the trim tab. And, a new one costs only a buck. In fresh water, it lasts like aluminum. A small thing, perhaps... but another ex ample of the tender, loving care in design, proving, and production to give you more RUN for your money with Mercury. mI'ERCURY 100, 85, 65, 50, 35, 20, 9.8 and 6 hp outboards MerCruiser Stern Drive Power Packages 310, 225, 190,140, and 110 hp gasoline 100 and 39 hp diesel © 1963, KIEKHAEFERCORPORATION,Fond du Lac, Wis., and Toronto. Subsidiary of Brunswick Corp.