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Yamaha Outboard Lower Gearcase Parts Diagram

The diagram below is applicable for the following models:

  • 25 HP (1986-87)
  • C25 (1990-91)
  • C30 (1989-91)
Yamaha Outboard Lower Gearcase Diagram - 25 HP, C25, C30Yamaha Outboard Lower Gearcase Diagram - 25 HP, C25, C30
RefDescriptionPart #ReplacesQty
1Gearcase housing-689-45311-04-EK31
2Trim tabSIERRA-18-6096A, SIERRA-18-6113664-45371-01-001
3Trim tab bolt-90105-08M02-001
4Water inlet cover (port)-689-45214-01-011
4aWater inlet cover (starboard)-689-45215-01-001
5Nylock nut-90185-05904-001
6Water inlet bolt-98680-05525-001
7Drain & vent plug-90340-08M04-003
8Plug gasket-90430-08020-003
9Gearcase mounting bolt-90105-10059-002
10Gearcase mounting washer-92990-10600-004
11Forward gear shim (0.05mm)-664-45567-00-05AR
Forward gear shim (0.08mm)-664-45567-00-08AR
Forward gear shim (0.12mm)-664-45567-01-12AR
Forward gear shim (0.30mm)-664-45567-01-30AR
Forward gear shim (0.50mm)-664-45567-01-50AR
12Forward gear bearing-93332-00005-001
13Forward gear-689-45560-00-001
14Clutch dog-664-45631-01-001
15Clutch dog pin-90250-05010-001
16Cross pin ring-648-45633-00-001
17Shift plunger-648-45635-00-001
18Shift slide-648-45634-00-001
19Compression spring-90501-10065-001
20Propeller shaft-689-45611-00-001
21Prop shaft thrust washer-90201-20417-001
22Reverse gear-689-45571-00-001
23Reverse gear shim (0.05mm)-664-45577-00-05AR
Reverse gear shim (0.08mm)-664-45577-00-08AR
Reverse gear shim (0.12mm)-664-45577-01-12AR
Reverse gear shim (0.30mm)-664-45577-01-30AR
Reverse gear shim (0.50mm)-664-45577-01-50AR
24Thrust washer-664-45576-00-001
25Bearing carrier o-ring-93210-30MA3-001
26Reverse gear bearing-93306-00612-001
27Bearing carrier-689-45331-01-941
28Bearing carrier key-90282-04010-001
29Prop shaft bearing-93315-22004-001
30Prop shaft sealSIERRA-18-055493101-20M07-002
31Tab washer-90214-45M02-001
32Cover nut-664-45384-00-001
33Prop spacer (fore)-664-45987-01-001
34Prop spacer (aft)-689-45997-00-001
35Prop mounting washer-92990-14200-001
36Propeller nut-90171-14013-001
37Cotter pinSIERRA-18-238091490-30030-00
38Dowel pin-93606-12019-002
39Pinion nut-90179-09M02-002
40Pinion gear-689-45551-00-001
41Thrust bearing-664-45552-09-001
42Pinion bearing-93315-017U4-001
43Drive shaft sleeve-689-45536-00-001
44Pinion gear shim (0.05mm)-664-45587-00-05AR
Pinion gear shim (0.08mm)-664-45587-00-08AR
Pinion gear shim (0.12mm)-664-45587-01-12AR
Pinion gear shim (0.30mm)-664-45587-01-30AR
Pinion gear shim (0.50mm)-664-45587-01-50AR
45Drive shaft bearing-93332-000U4-001
46Drive shaft (long)-689-45501-10-001
47Impeller key-664-44338-00-001
48Pump base oil sealSIERRA-18-029693101-22067-002
49Base gasketSIERRA-18-0773689-44316-A0-001
50Water pump base-689-44325-02-5B1
51Base gasketSIERRA-18-0773689-44316-A0-001
52Impeller plate-689-44323-03-001
53Impeller plate gasket-689-44234-A0-001
54ImpellerSIERRA-18-3067689-44352-02-001
55Insert cupSIERRA-18-3439689-W4432-02-001
56Water seal damper-689-44367-01-001
57Water pump housing-689-44311-03-001
58Pump housing bolt-90101-06M56-003
59Housing washer (short shaft)-90209-06M04-003
60Lower water tube seal-626-44365-01-001
61Water tube (long shaft)-689-44361-10-001
62Upper water tube sealSIERRA-18-0552689-44366-00-001
63Housing extension (long shaft)-689-44312-00-5B1
64Extension bolt (long shaft)-97080-06035-003
65Bolt washer (long shaft)-92990-06600-003
66Extension tube (long shaft)-689-44362-00-941
67Extension tube o-ring-93210-26240-002
68Plate (long shaft)-689-44328-03-001
69Shift cam assembly (short shaft)-664-44150-01-001
69Shift cam assembly (long shaft)-664-44150-11-001
70Shift rod boot-664-44147-00-001
71Shift shaft bracket-689-44176-01-001
72Bracket screw-97780-50610-001
73Gear housing seal kitSIERRA-18-2785689-W0001-22-001
74Water pump repair kitSIERRA-18-3427689-W0078-A6-001

Sorry, is not an active item in our system. However, we may still be able to help you. Please email us at rajeshk@klizer.com or call us at (866)388-0390 for assistance. Please make sure to have the item number handy when you contact us.

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