1、You can use the fast idle button to advance the throttle without shifting gears. Place the control lever in neutral and press the fast idle button (cover) to open the throttle to start and warm up. 2、When the control handle is in neutral and the fast idling function is not activated, move the control handle to the forward gear or reverse gear position. Continue to move the control handle in the same direction to open (forward) the throttle. 3、The rope can be connected to the operator's clothes, arms or legs to ensure safe operation. If the operator falls or leaves the rudder, the rope will pull out the clamp and stop the ignition. 4、The power trim and tilt switch are installed on the control lever grip and the twin cover. Pushing it up will trim up and tilt the engine up, and vice versa. 5、It is suitable for Mariner OB with integral power trim and 1993 and newer Force OB 40hp.