New genuine Yamaha link rod 2, part number 6H4-42192-00.  This part fits the following Yamaha outboard motors.

1985 50ETLK Steering
1985 50ETSK Steering
1984 50ETLN Steering
1984 50ETSN Steering
1985 40LK STEERING (40E 40ET)
1985 40ESK STEERING (40E 40ET)
1985 40SK STEERING (40E 40ET)
1985 40ETLK STEERING (40E 40ET)
1985 40ELK STEERING (40E 40ET)