62Y3A11 6-7812345678I5. Slowly turn the drive shaft clockwise andcounterclockwise and measure the back-lash when the drive shaft stops in eachdirection.6. Add or remove shims if out of specifica-tion.M: Measurement7. Remove the special service tools fromthe propeller shaft.8. Apply a load to the reverse gear by install-ing the propeller 0 without the spacer A,and washer B and washer C as shown.NOTE:Tighten the propeller nut D while turning thedrive shaft until the drive shaft can no longerbe turned.9. Slowly turn the drive shaft clockwise andcounterclockwise and measure the back-lash when the drive shaft stops in eachdirection.10. Check the pinion shim if out of specifica-tion.11. Remove the special service tools, andthen install the water pump assembly.Backlash indicator gauge 6: YB-06265Backlash indicator 6: 90890-06706Magnetic plate 7: YB-07003Magnet base plate 7: 90890-07003Dial gauge 8: YU-03097Dial gauge set 8: 90890-01252Magnet flexible stand 9: YU-34481Magnet base 9: 90890-06705Forward gear backlash:0.12–0.45 mm (0.005–0.018 in)Forward gearbacklash Shim thicknessLess than0.12 mm (0.005 in)To be decreased by(0.29 – M) × 0.57More than0.45 mm (0.018 in)To be increased by(M – 0.29) × 0.57Available shim thicknesses:0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and0.50 mmReverse gear backlash:0.71–1.11 mm (0.028–0.044 in)Backlash (T50/FT50B, FT50C)
