Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 465Get this manual
ATTACHMENTSCONTROL LINKAGE
STEERING SYSTEM TENSION ADJUSTMENT
IMPORTANT: After this dual steering cable attachment kit is installed, there must be proper tension in forward mounted steering cable tor this attachment kit to operate properlyNot enough tension will cause slack (or play) in steering systemToo much tension will cause steering cables to bindPerform the following steps to adjust for correct tensionLoosen adjustment nuts and pull steering cable mounting tube (by hand) away from end of steering cable (to remove slack in steering system)Tighten adjustment nuts against mounting bracket and check system for slack (play If steering system is too tight, readjust tube toward end of steering cable or, if too much slack (play) exists in system, readjust tube away from end of steering cableTighten nuts against mounting bracket and readjust, if necessarya d