Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 464Get this manual
ATTACHMENTSCONTROL LINKAGE
Coupler Installation
WARNING
Locknuts must be used with bolts to secure steering cables to couplerFailure to adhere to this requirement could result in steering system failureSlide coupler (a) onto steering cable ends and secure each steering cable to coupler with bolt (b) and locknut (c) as shownTighten to torque of 20 Ibft(27 Nm)
Installing Link Rod