Yamaha F50D Servise Manual - page 268

Lower unit

8-69

LOWR

13. Check that the forward gear backlash

average is within specification.

TIP:

Adjust the shim thicknesses if the forward

gear backlash is out of specification.

14. Remove the special service tools, and

then install the oil seal housing assembly,

shift rod assembly, and water pump

assembly. See “Installing the water

pump” (8-61).

Shimming

9

Make sure to select the pinion shim(s) (T3)

before selecting the forward gear shim(s)

(T1).

9

When assembling the lower unit to mea-

sure the backlash after selecting the pinion

shim(s), do not apply gear oil, grease, or

sealant to the parts.

9

When assembling the lower unit after shim-

ming is completed, make sure to apply gear

oil, grease, and sealant to the specified

areas.

Forward gear backlash:

0.12–0.45 mm (0.005–0.018 in)