Saf-T-Stop Switch 

Dual I/O With Coiled Lanyard

For dual inboard engines, does not work with outboards. Meets requirements of existing laws covering mandatory use of emergency stop switches. Plastic self-retracting lanyard. Black matte finish for attractive appearance. Mounts in a 1-1/2" diameter hole.Overall dimensions of switch housing are 2-3/4" x 2" and requires 1-1/2" behind panel. Dual engine switches provide two completely isolated circuits to prevent feedback from one engine to the other.