BEFORE YOU OPERATE PROPELLER SELECTION Recommended Propeller Size (Maximum) NOTICE: Make sure the propeller (fixed or folding) has a rubber bushing. If a propeller is used without a rubber bushing, the shaft, bearing and gears of the Sail-Drive will be damaged. 16 SD Operation Manual © 2009 Yanmar Marine International Engine Model Sail-Drive Model Folding Type Diameter 2-Blade Fixed Type Diameter 1GM10C SD20 14 in. 14 in. 2YM15 14.5 in. 15 in. 3YM20 15 in. 16 in. 3YM30 16 in. 16.5 in. 3JH4CE SD50 18 in. 18 in. 3JH5CE 4JH4ACE 4JH5CE 4JH4–TCE SD50-4T 18 in. 18 in.