Checking The Dog Clutch; Checking The Propeller Shaft Housing; Checking The Reverse Gear; Assembling The Propeller Shaft Assembly - Yamaha F4B Service Manual

LOWR
Propeller shaft runout:
0.02 mm (0.001 in)

Checking the dog clutch

1. Check the dog clutch, shift plunger, and
spring. Replace if cracked or worn.

Checking the propeller shaft housing

1. Check the propeller shaft housing.
Replace if cracked or damaged.

Checking the reverse gear

1. Check the teeth and dogs of the reverse
gear. Replace if cracked or worn.
Assembling the propeller shaft
assembly
1. Install the spring a into the hole in the
propeller shaft b.
2. Push the spring a, and then install the
dog clutch c.
a
b
8-9
Lower unit
c
Assembling the propeller shaft
housing assembly
Do not reuse a bearing, oil seal, or O-ring,
always replace it with a new one.
1. Install new oil seals a.
b
c
Driver rod L3 b: 90890-06652
Needle bearing attachment c:
90890-06615
TIP:
Install an oil seal halfway into the propeller
shaft housing, and then install the other oil
seal.
2. Install a new ball bearing d.
3. Install a new O-ring e.
f
g
e
d
Driver rod LS f: 90890-06606
Bearing outer race attachment g:
90890-06628
TIP:
Face the identification mark a on the ball
bearing toward the reverse gear.
a
a