Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 304Get this manual
2Example (if backlash is too high) Backlash checks: (subtract) middle .070 in.055 in (1.79 mm) 3 Temporarily install the propeller shaft (without sliding clutch installed) into the reverse gearPosition the shift crank so propeller shaft will rest on the crank Lubricate the thrust bearing with Quicksilver Gear Lubricant (92- 13783A24) and place it onto the forward gear
specification: You get:
(1 .39 mm) (0.38 mm)
add this quantity of shims
Example (if backlash is too low) middle of specification: Backlash checks: (subtract) You get: .055 in.020 in .035 in
(1.39 mm) (0.51 mm) (0.19 mm)