2005+ Mercury Verado 4 Stroke 200/225/250/275 6 gear housing Service Manual, Page 72Get this manual
Right Hand Rotation
Observe the dial indicator and record the readingLoosen the indicator tool and rotate the driveshaft 90 degrees in clockwise direction Repeat step above and take and record another readingRepeat step until total of backlash readings have been taken
4Add the four readings together and divide the sum by fourThis is your average backlash If backlash is not as indicated, gearcase is not properly assembled or parts are excessively worn and must be replaced before returning gearcase to serviceReverse Gear Average Backlash
1.27 mm1.47 mm (0.050 in- 0.058 in
5Remove the backlash indicator toolRemove the dial indicator and all its mounting components
Propeller Shaft Bearing Preload
NOTE: All gear housing components must be installed and correctly shimmed before checking propeller shaft bearing preloadPropeller shaft tapered roller bearing must be properly seated in race during installationDriveshaft retainer should be torqued to specificationDescription Driveshaft retainer