Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 387Get this manual
RIGHT HAND NON-RATCHETING
Pinion Gear DepthForward Gear BacklashReverse Gear Backlash
DETERMINING PINION GEAR DEPTH
NOTE: Read entire procedure before attempting any change in shim thicknessIMPORTANT: Forward gear assembly must be installed in gear housing when checking pinion gear depth or an inaccurate measurement will be obtained1Clean the gear housing bearing carrier shoulder2Install Bearing Preload Tool (91-14311A1) over driveshaft in sequence shown
NOTE: Bearing Preload Tool (91-44307A1) may also be usedFollow instructions provided with tool for proper installation