Yamaha F50 Service Manual

							62Y3A116-12
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No. Part name Q’ty RemarksTightening torques
Stage N·mkgf·mft·lb
1 Propeller shaft assembly 1
2 Propeller shaft housing 
assembly1
3 Spacer 1
4Grommet 1
5Bolt 4 M8 ×
 20 mm
6 Water pump housing 1
7 Insert plate cartridge 1
8Impeller 1
9 O-ring 1
Not reusable
10 Outer plate cartridge 1
11 Gasket 1
Not reusable
12 Dowel pin 2
13 Woodruff key 1
14 Slider 1
15 Spring 1
16 Cross pin 1
17 Dog clutch 1
18 Spring 1
19 Propeller shaft 1
20 Shift plunger 1
21 Washer 1
22 Bolt 2 M8 ×
 25 mm
23 Reverse gear 1
24 Reverse gear shim—As required
25 Ball bearing 1
26 O-ring 1
Not reusable
27 O-ring 2Not reusable
28 Propeller shaft housing 1
29 Needle bearing 1
30 Oil seal 2
Not reusable
Water pump and propeller shaft housing (F50/F50A) 
						

							LOWRLower unit
6-1362Y3A11
Removing the water pump and 
propeller shaft housing assembly
1. Remove the water pump assembly.
2. Remove the propeller shaft housing
assembly by removing the bolts 1
, then
pulling the housing out.
ÈFor USA and Canada
ÉFor worldwide
Disassembling the propeller shaft 
housing
1. Remove the reverse gear and shim(s).
ÈFor USA and Canada
ÉFor worldwide
NOTE:
Install the bearing separator 2
 between the
reverse gear and propeller shaft housing
completely, then the other special service
tools.
2. Remove the ball bearing. Bearing housing puller 2
: YB-06234 
Universal puller 3
: YB-06117
Bearing housing puller claw 4
:
90890-06564
Stopper guide plate 5
: 90890-06501
Center bolt 6
: 90890-06504
Slide hammer and adapters 1
: YB-06096 
Bearing separator 2
: 90890-06534
Stopper guide plate 3
: 90890-06501
Stopper guide stand 4
: 90890-06538
Bearing puller 5
: 90890-06535
Bearing puller claw 1 6
: 90890-06536 
						

							62Y3A116-14
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ÈFor USA and Canada
ÉFor worldwide
3. Remove the oil seals and needle bear-
ing.
Disassembling the propeller shaft 
assembly
1. Remove the spring 1
, then the cross pin
2
, dog clutch 3
, slider, and spring.
Checking the water pump
1. Check the pump housing for deforma-
tion. Replace if necessary.
2. Check the impeller 1
 and insert plate
cartridge 2
 for cracks or wear. Replace
if necessary. Slide hammer and adapters 7
: YB-06096 
Stopper guide plate 8
: 90890-06501
Stopper guide stand 9
: 90890-06538
Bearing puller 0
: 90890-06535
Bearing puller claw 1 A
: 90890-06536
Bearing housing needle bearing remover B
:
YB-06112
Needle bearing attachment B
:
90890-06614
Driver handle C
: YB-06071
Driver rod L3 C
: 90890-06652
S62Y6100
S62Y6105
1
2
Water pump and propeller shaft housing (F50/F50A) 
						

							LOWRLower unit
6-1562Y3A11
3. Check the Woodruff key 3
 and the
groove a
 on the drive shaft for wear.
Replace if necessary.
Checking the propeller shaft housing
1. Clean the propeller shaft housing using a
soft brush and cleaning solvent, and then
check it for cracks. Replace if necessary.
2. Check the teeth and dogs of the reverse
gear for cracks or wear. Replace the
gear if necessary.
3. Check the bearings for pitting or rum-
bling. Replace if necessary.
Checking the propeller shaft
1. Check the propeller shaft for bends or
wear. Replace if necessary.
2. Check the dog clutch and shift plunger
for cracks or wear. Replace if necessary.S62Y6110
3
S62Y6115
S62Y6120
S62Y6130 
						

							62Y3A116-16
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Assembling the propeller shaft 
assembly
1. Install the dog clutch as shown.
NOTE:
Install the dog clutch 1
 with the “F” mark a
facing toward the shift plunger.
Assembling the propeller shaft 
housing
1. Install the needle bearing into the propel-
ler shaft housing to the specified depth.
È
For USA and Canada
É
For worldwide
NOTE:
Install the needle bearing with the manufac-
ture identification mark a
 facing toward the
oil seal (propeller side).
Do not strike the driver rod in a manner that
will force the stopper b
 out of place. 
2. Apply grease to the new oil seals, and
then install them into the propeller shaft
housing to the specified depth.
È
For USA and Canada
É
For worldwide
NOTE:
Install an oil seal halfway into the propeller
shaft housing, then the other oil seal.
Driver handle 1
: YB-06071
Bearing housing needle bearing installer 2
:
YB-06111
Driver rod SS 3
: 90890-06604
Needle bearing attachment 4
:
90890-06614
Bearing depth plate 5
: 90890-06603
Depth c
: 3.0–3.5 mm (0.12–0.14 in)
Depth d
: 23.0–23.5 mm (0.91–0.93 in)
Water pump and propeller shaft housing (F50/F50A) 
						

							LOWRLower unit
6-1762Y3A11
3. Install the original shim(s) 0
 and ball
bearing into the reverse gear using a
press.
ÈFor USA and Canada
ÉFor worldwide
CAUTION:
Add or remove shims, if necessary, when
replacing the reverse gear or propeller
shaft housing.
NOTE:
Install the ball bearing with the manufacture
identification mark 
f facing outward (propel-
ler side).4. Install the reverse gear assembly to the
propeller shaft housing using a press. Oil seal installer 6
: YB-06168
Driver handle 7
: YB-06071
Needle bearing attachment 8
:
90890-06653
Driver rod L3 9
: 90890-06652
Depth 
e: 4.0–4.5 mm (0.16–0.18 in)
Forward/reverse gear bearing installer A
:
YB-06270-A
Bearing inner race attachment B
:
90890-06639
Bearing cup installer C
: YB-06167
Needle bearing attachment D
:
90890-06607 
						

							62Y3A116-18
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Installing the propeller shaft housing
1. Install the washer 1
, propeller shaft
assembly 2
, and shift plunger 3
, into
the propeller shaft housing assembly 4
.
2. Apply grease to the new O-rings.
3. Install the propeller shaft housing assem-
bly into the lower case 5
, and then
tighten the bolts 6
.
NOTE:
When installing the propeller shaft assembly,
be sure not to drop the shift plunger 3
.
Installing the water pump
1. Install the new gasket and outer plate
cartridge.
2. Install the Woodruff key into the drive
shaft. 
3. Align the groove on the impeller 1
 with
the Woodruff key 2
, and then install it to
the drive shaft.4. Install the insert plate cartridge 3
 into
the water pump housing 4
.
NOTE:
Align the projection a
 of the insert plate car-
tridge with the hole b
 in the pump housing.
 S62Y6195
3 4
A
a
b
Water pump and propeller shaft housing (F50/F50A) 
						

							LOWRLower unit
6-1962Y3A11
5. Install the O-ring 5
, pump housing
assembly 4
, and dowel pins 6
 into the
lower case, tighten the bolts 7
, and then
install the grommet 8
 and spacer 9
.
NOTE:
When installing the pump housing, apply
grease to the inside of the housing, and
then turn the drive shaft clockwise while
pushing down the pump housing.
Align the spacer projection a
 with the hole
b
 in the pump housing.
S62Y6200J
A
a
b 9
8
7
4
6
5 6 
						

							62Y3A116-20
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— MEMO —
Water pump and propeller shaft housing (F50/F50A) 
						

							LOWRLower unit
6-2162Y3A11
Drive shaft and lower case (F50/F50A)6