SeaStar CH7800 Series Dual Top Mount Control The ergonomics and features of our controls are the most advanced and are suitable for most kinds of boat with dual engine applications. the shapley, balanced handle provides a very comfortable feel and the state of the art mechanism guarantees a smooth yet solid action, assuring you have maximum control at all times. this control is designed for twin engine applications. CH7800 controls are suitable foe use with both iniversal type 3300 or OEM type c