Johnson 40, 48, 50 HP Gearcase (1989-2003) Exploded View

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Sierra
Johnson 40, 48, 50 HP Gearcase (1989-2003) Exploded View
Johnson Gearcase Exploded View Diagram and Parts
Fits 40 / 48 / 50 HP 1989-2003
Figure #DescriptionO.E.M. #Sierra #Qty.
1Housing, W/P435673 18-31291
2Seal, Rubber324981 18-7481 11
3Plate, Insert321940 18-3126 11
4Skirting, Insert324980 18-3128 11
5Impeller432941 18-3104 11
6Key, Impeller334897 18-3138 11
7Plate, Impeller336251 18-3139 11
8Seal, Upper332205 18-20641
8Seal, Lower321466 18-20591
9Cap, Upper Driveshaft Retaining435274 1
10O-Ring, Gear Housing310327 18-71731
11Part of Figure #9   
12Shim (.003)313273 AR
12Shim (.004)313274 AR
12Shim (.005)313275 AR
12Shim (.006)313276 AR
12Shim (.007)313277 AR
13Washer, Thrust333771 18-02012
14Thrust Bearing, Driveshaft398901 18-13681
15Driveshaft (std.)433066 1
15Driveshaft (long)433067 1
16Bearing, Pinion382343 18-13561
17Gear Set, Forward & Pinion397627 18-23101
18Nut, Pinion313339 1
19Shift Rod (std.)332509 1
19Shift Rod (long)332510 1
20Bushing, Shift Rod333780 1
21O-Ring, Shift Rod318372 18-71371
22Cover, Shift Rod435543 18-17291
23O-Ring, Shift Rod Cover3852928 1
24Connector, Shift Rod332508 1
25Pin, Connector302504 1
26Cotter Pin306376 1
27Lever, Shift332492 1
28Cradle, Shifter332507 1
29Housing, Gearcase435275 1
30Drain Plug, Upper309243 1
31O-ring336982 18-4253-91
32Retaining Screw324852 1
33Seal332584 1
34Screw, Shift Lever333770 1
35O-Ring, Screw317178 18-71091
36Drain Fill Plug, Lower318544 18-23781
37Gasket, Drain Plug311598 1
38Screen, Water Intake332494 2
39Trim Tab340539 1
40Shaft, Shift Dog332503 1
41Ball, Detent316506 18-22433
42Spring, Shifter332484 1
43Clutch, Sliding332491 18-23081
44Pin, Clutch Cross320310 1
45Spring, Clutch320311 18-23981
46Propeller Shaft439138 18-22521
47Thrust Bearing, Forward Gear432264 18-13691
48Bearing, Forward Outer382407 18-13511
49Thrust Washer, Forward Gear333725 18-01971
50Thrust Bearing, Forward Gear397538 18-13641
51Bolt, Carrier Retaining328744 2
52Bolt, Anode Retaining3852473 2
53Gear, Reverse332489 18-23091
54Thrust Bearing, Reverse Gear397537 18-13631
55Thrust Washer, Reverse Gear332514 18-01961
56O-Ring, Bearing Housing553126 18-71721
57Bearing, Needle386764 18-13541
58Bearing Carrier Assembly432276 18-17081
59Tabs, Retaining332495 18-13432
60Bearing, Needle386765 18-13551
61Oil Seals, Prop Shaft321467 18-20602
62Anode, Bearing Housing398873 1
63Water Pump Repair Kit433548 18-33941
64Gear Housing Seal Kit (2 cyl.)433550 18-26941
***Gear Set, Complete (F,P,R) 18-2315NA1
1Contents of Water Pump Kit 18-3394
ARAs required
Full StarFull StarFull StarFull StarFull Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull StarGreat price fast shipping
by Romeo from Oak Harbor, Washington on June 11, 2012
You can't beat the price on this wear out plate and the fast shipping it comes with.
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Average Customer Review for Carrier Bearing Omc - 18-1351 - Sierra
Full StarFull StarFull StarFull StarFull Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull StarPerfect fit
by Toby from Dixon, Illinois on September 23, 2012
Awesome part
(0 of 1 people found this review helpful)
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Full StarFull StarFull StarFull StarFull Star Based On 3 Reviews | Write Review
Full StarFull StarFull StarFull StarFull StarGreat service
by Jerry from Kennedale, Texas on October 23, 2015
Can't believe how easy y'all make it, fast, correct, great prices !! iboats.com will be my main parts source from now on !!!!!
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Full StarFull StarFull StarFull StarFull Star1989 johnson lower unit seal kit
by Donald from Romulus, Michigan on September 07, 2014
Everything fit as expected,
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Full StarFull StarFull StarFull StarFull StarTone's Small Engine Repair
by Tony from Scottsbluff, Nebraska on October 08, 2011
Very Good Parts to work with....... Tone
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Full StarFull StarFull StarFull StarEmpty Star Based On 5 Reviews | Write Review
Full StarFull StarFull StarFull StarFull StarPerfect
by Jerry from Kennedale, Texas on October 23, 2015
Could'nt ask for any better service, fast delivery the right parts at a good price !!!
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Full StarFull StarFull StarFull StarFull StarWater Pump Repair Kit 18-3394
by Leslie from Rock Hill, South Carolina on April 28, 2015
There isn't much to say, the kit has everything you need to rebuild your water pump. Just follow the directions.......I forgot, there are no directions but all the parts are there. If you need directions you should not be doing this repair by you self.
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Full StarFull StarFull StarFull StarFull Stareverything worked great thank you
by Scott from Redding, California on June 27, 2013
i have been trying to find schematics and or diagrams exploded so i can search for parts but no luck on your site as of yet am i missing something. Thank you all, parts worked well and up and running on the lake again, you guys are great. Thanks again Scott Foster
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Full StarEmpty StarEmpty StarEmpty StarEmpty Staro ring not the correct one
by Guillermo from Brownsville, Texas on May 06, 2013
Kit had the wrong o ring i called customer service, the lady told me it was the right one. There's no way it would a fit. Totally different. I got the o ring from boat. Net problem solved.
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Full StarFull StarFull StarFull StarFull StarWP repair kit
by Francis from Austin, Texas on July 03, 2011
Completed installation today 7/3/11. No problems with installation and water pump worked perfect during our first two test runs.
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Average Customer Review for Water Pump Housing - 18-3129 - Sierra
Full StarFull StarFull StarFull StarEmpty Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarEmpty Starwater pump
by Craig from Newport, Kentucky on June 24, 2011
yes it was good but it did not have the metal guts to it and it did not recamend it.if there are other parts to somthing you should recmend it.thank you craig
(0 of 1 people found this review helpful)
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Full StarFull StarFull StarFull StarEmpty Star Based On 2 Reviews | Write Review
Full StarFull StarFull StarEmpty StarEmpty Starpump key
by Adam from st-Sebastien, Quebec on June 08, 2014
was supposed to fit my motor year....but it didn't....doesn't matter the pump rebuild kit i got was right. no harm done.
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Full StarFull StarFull StarFull StarFull Stargreat product and great price!
by Daniil from Citrus Heights, California on August 25, 2013
great product and great price! very satisfied!
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Average Customer Review for Sierra 18-2060 - Oil Seal Omc
Full StarFull StarFull StarFull StarEmpty Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarEmpty StarOMC prop shaft seals
by Brian from Georgetown, South Carolina on May 17, 2016
Priced low and I was very satisfied with the product
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Average Customer Review for Water Pump Impeller - 18-3104 - Sierra
Full StarFull StarFull StarFull StarHalf Star Based On 6 Reviews | Write Review
Full StarFull StarFull StarFull StarFull StarImpeller
by Jose from Bandera, Texas on April 15, 2016
Excellent product perfect fit
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Full StarFull StarFull StarFull StarFull StarWater Pump Impeller for Johnson/Evinrude
by Donald from Romulus, Michigan on September 07, 2014
Back up and running A+
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Full StarFull StarFull StarFull StarFull StarWonderful!!
by Brandy from Evarts, Kentucky on July 30, 2014
Fabulous sales representative..great prices..the only place I will be ordering my parts from!!!!
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Full StarFull StarFull StarEmpty StarEmpty Starcheap made
by Daniil from Citrus Heights, California on August 25, 2013
my OEM impeller's inside core is metal/brass and shown in this picture, but received a taiwan made of plastic instead of metal. and the groove on the inside where the impeller key goes is the opposite direction. other then that it seems to pump the water ok.
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Full StarFull StarFull StarFull StarFull Starimpeller/johnson
by Jerry from Saint Clair, Missouri on August 01, 2012
service was excellent. product arrived in about 3 days.
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Full StarFull StarFull StarFull StarFull Starwater impeller
by Tenna from Kinder, Louisiana on February 13, 2012
it is working like it should, thank you
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Average Customer Review for Sierra 18-2378 Magnetic Drain Screw
Full StarFull StarFull StarFull StarFull Star Based On 3 Reviews | Write Review
Full StarFull StarFull StarFull StarFull Star1998 johnson 50 hp drain plug
by Donald from Romulus, Michigan on September 07, 2014
A+ back up and running
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Full StarFull StarFull StarFull StarFull StarWorks Good.
by Kevin from Santa Cruz, California on July 27, 2012
Replace that old one.
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Full StarFull StarFull StarFull StarFull StarJust what I was looking for
by James from Grand Forks, North Dakota on August 25, 2011
Great buy - just what I was looking for at a reasonable price
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Q:
Do you stock the bolt for this item?
A:
No we do not have the bolt for this unfortunately.
Q:
Will this housing fit a 1075 70hp Evinrude?
A:
No. We do not currently carry the water pump housing for this engine.
Q:
Will this fit a 1985 evinrude 150?
A:
Please call in with your engine model number to confirm if this will work.
Ask a question
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Johnson / Evinrude / OMC 432264 replacement parts
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  • OMC 432264
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  • OMC 397537
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  • MERCURY MARINE 46895
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  • OMC 382407
    Cobra
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Shaft Size: 0.750
O.D - 1.126
Width: 0.200

Replaces OEM part #
  • OMC 321466
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  • OMC 433550
Kit Contains:
    (1) 18-2709 Wear Plate Gasket - replaces O.E. # 336530
    (1) 18-7115 O-Ring - replaces O.E. # 302588
    (1) 18-7127 O-Ring - replaces O.E. # 313446
    (1) 18-7120 O-Ring - replaces O.E. # 307853, 322598
    (1) 18-7172 O-Ring - replaces O.E. # 553126
    (1) 18-7137 O-Ring - replaces O.E. # 318372
    (1) 18-7475 O-Ring - replaces O.E. # 332584
    (1) 18-7481 Seal - replaces O.E. # 315788
    (1) 18-2708 Seal - replaces O.E. # 333758
    (2) 18-2059 Oil Seal - replaces O.E. # 321466
    (2) 18-2018 Oil Seal - replaces O.E. # 305987
    (1) 18-2064 Oil Seal - replaces O.E. # 332205
    (1) 18-2705 Seal - replaces O.E. # 315748
    (1) 18-4248 Washer - replaces O.E. # 311598
    (1) 18-7173 O-Ring - replaces O.E. # 310327, 910582
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  • OMC 434588
For: Evinrude/Johnson 40hp (1993-02), 48hp (1993-96), and 50hp (1993-02)
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Shaft Size: 0.730
O.D. - 1.130
Width: 0.194

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  • OMC 332205
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  • OMC 333957
For: Evinrude/Johnson 100, 120, 125, 140, 150, 175, 200, 225 (1988-1992) and OMC Cobra Drives & V-6
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  • OMC 320311
For: Evinrude/Johnson 2&3 Cylinder
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Replaces OEM part #
  • OMC 433548
  • OMC 433549
  • OMC 438592
Contains:
  • (1) 18-7481 O-Ring - replaces O.E.#324981
  • (1) 18-2708 Grommet - replaces O.E.#333758
  • (1) 18-2709 Wear Plate Gasket - replaces O.E.#336530
  • (1) 18-3104 Impeller - replaces O.E.#432941
  • (1) 18-3138 Impeller Key - replaces O.E.#334897
  • (1) 18-2705 Seal - replaces O.E.#315748
  • (4) 18-3133 Stainless Steel Bolt - replaces O.E.#331979
  • (1) 18-3126 Wear Plate - replaces O.E.#321940
  • (1) 18-3139 Impeller Plate - replaces O.E.#46895
Applies for Johnson/Evinrude engines
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  • OMC 386764
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  • OMC 398901
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  • OMC 397538
Johnson / Evinrude / OMC 333771 replacement parts
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  • OMC 333771
For: Evinrude/Johnson 40-60hp (1990-95)
Drive Shaft
Sierra 18-2309 Reverse Gear
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  • OMC 332489
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  • OMC 435673
(5 count)
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Dimension ( in )
I.D. .214
Width: .048

Replaces OEM part #
  • OMC 317178
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  • OMC 332491
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Part # 18-2315
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Kit Contains:
    (1) 18-2310 Forward Gear - replaces O.E. # 397627
    (1) 18-2309 Reverse Gear Set - replaces O.E. # 332489
    (1) 18-2308 Sliding Clutch - replaces O.E. # 332491

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  • OMC 324981
Package of 2
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  • OMC 386765
Water Pump Impeller Key for Johnson/Evinrude 334897, GLM 89592 - Sierra
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  • OMC 334897
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  • OMC 333725
For: Evinrude/Johnson 40-55hp (1989-95)
Forwad Gear
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  • OMC 321940
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Part # 18-2060 ValueShip™ Eligible
2 Required, priced individually.
Shaft Size: 1.000
O.D. - 1.375
Width: 0.250

Replaces OEM part #
  • OMC 321467
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    Replaces OEM part #
    • OMC 382343
    • MERCURY MARINE 31-54928
    For: Mercruiser 215 E/H (1970-72): II,TR (1973-76): 225 TRS, 280 TRS (1973-76): TR, TRS (1977-93).
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    Details:
    • I.D. 3.250"
    • Width .135"
    Replaces OEM part #
    • OMC 553126
    • MERCURY MARINE 25-31305
    Johnson / Evinrude / OMC 397627 replacement parts
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    Part # 18-2310 ValueShip™ Eligible
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    Replaces OEM part #
    • OMC 397627
    Includes: Forward & Pinion Gears
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    Dimensions ( in )
    I.D. 0.320
    Width .155

    Replaces OEM part #
    • OMC 318372
    Evinrude Drain Screw Ring
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    Replaces OEM part #
    • OMC 336982
    Used w/18-1236 Drain Screw
    Package of 5
    GLM 22490 replacement parts
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    Package of 2

    Replaces OEM part #
    • OMC 316506
      For: V-4 & V-6 gearcase OMC Sterndrive 400 Series (1978-79): 800 Series (1978)
    For: Evinrude/Johnson 9.9-35hp
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    Part # 18-2252
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    Replaces OEM part #
    • OMC 436888
    • OMC 387818
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    Dimensions ( in )
    I.D. 1.875
    Width .135

    Replaces OEM part #
    • OMC 310327
    • OMC 910582
    • MERCURY MARINE 25-30224
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    • OMC 432941
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    Replaces OEM part #
    • OMC 318544

    Details: 

    • Head Style: Slot Head

    Fits: Evinrude/Johnson V6, V4(1979 & up), 60-75hp 3 Cylinder, 20-35hp(1985-97)
    Fits: OMC- Cobra 2.3, 3.0, 3.8 & 5.8L ( 1986-92 ), V6, V4 ( 1979 & up ), 60-75 hp 3 cyl, 40/50 hp ( 1989-98 )

    OMC L/uint Oring 2 Req
    Your Price: $0.76
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    Part # 444-501
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      OMC:
    • 318372
    OMC Impeller 40-50hp Wedge Type
    Your Price: $21.27
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    Part # 700-255
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      OMC:
    • 432941
    • 437059
    • 765350