Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 482Get this manual
ATTACHMENTSCONTROL LINKAGE
Trim Tab Adjustment
DUAL OUTBOARDCOUNTER ROTATION INSTALLATION
1Shift outboard into neutral and make sure ignition key is at "OFF" position2Remove plastic cap from rear of driveshaft housing and loosen bolt and trim tab3Position trim tabs of both outboards straight to rear of outboard, so that tabs are aligned with gear housing centerline4Tighten both trim tab bolts securely and replace plastic capsNo further adjustment will be required