Suzuki DF 2.5 Service Manual page 140

8-20 LOWER UNIT
Adjusting gear backlash (Pinion and Forward gear)
To check the backlash, hold the pinion gear by hand, then gently
rock forward gear back and forth by hand.
Gear backlash: 0.10 – 0.20 mm (0.004 – 0.008 in)
• If backlash is larger than the specified, the thickness of the
forward gear backup shim must be increased.
• If backlash is smaller, the thickness of the backup shim must
be decreased.
Checking and adjusting tooth contact pattern
(Pinion and Forward gear)
Check tooth contact pattern by using the following procedure.
• To assess tooth contact, apply a light coat of Prussian Blue
on the convex surface of the forward gear.
• Install the propeller shaft and the housing assembly.
Do not install the push rod.
NOTE:
Securing the propeller shaft housing with the bolts is not
required.
• Push the propeller shaft inward and hold in position.
• Rotate the driveshaft 5 – 6 times clockwise.
• Carefully pull out propeller shaft and housing to check tooth
contact pattern.
Concave side
Convex side
Heel
Tooth top
Tooth bottom
Tooth width
Toe
TOOTH
CONTACT
PATTERN