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Sierra

mercruiser sterndrive drive shaft housing components exploded view
Mercruiser Sterndrive Drive Shaft Housing Components Exploded View Diagram and Parts
Fits Alpha One / Gen II
Figure #DescriptionO.E.M. #Sierra #
1Drive Shaft Housing (OL100009 & UP)1547-861063A 4 18-2411
2Screw10-79953A2 18-2244
3Washer12-19183, 12-20260* 18-2945
4Filler Wall N/A
5Oil Seal26-66302* 18-0594
6aWear Pad, Port814386NSS
6bWear Pad, Std.814387NSS
7Water Tube32-860220 18-3221
8Seal26-8839718-2095
9GKN Series u-joint assy.864281A 2 18-6402
10aSocket, Center (old design)39383T 18-2128
10bSocket, Center- GKN series NSS
11Cross and Bearing
11aD469859 - F679999 (old design)75832A2 18-2174
11bF680000- OK999999 (old design- permalube)805536A2 18-2097
11cOL100009 & UP (GKN Series) NSS
12aYoke, Coupling End59830A1 18-2146
12bYoke, Coupling End (GKN Series) NSS
13aYoke, Gear End46020T 18-2125
13bYoke, Gear End (GKN Series) NSS
14Retaining Nut816811-1 18-3752
15Ring35983 18-4296
16O-Ring25-70937* 18-7169
17Carrier Assembly (Set)66081A2 18-0577
18Oil Seal26-68493 18-2003
19Roller Bearing Kit (D469859 - K999999)31-35988A2, A12 18-1160
19aRoller Bearing Kit (OL100009 & UP)31-30894A 15 18-1182
20Cup Spacer (Included with 18-1160)31-35988A2, A12 18-1160
20aCup Spacer (Included with 18-1182)23-853649A 1NSS
21Shim15-35980A1 18-2292
22Shim15-71013 18-2296
23Upper Unit Gear Set Alpha One Coverage (6225577 & UP) 18-2201
Alpha One Gen II coverage (0D469859-0K999999) 18-2256
1.5:1/ 1.47:1 Gear Set (tooth count& 20/22)43-18410A2, 43-18411A2 18-2201
Std.Rebuild Kit43-803116T 1 18-2256
Complete Service Kit43-803102T 1 18-2358
1.65:1/ 1.62:1 Gear Set (tooth count& 24/24)43-45814A5 18-2203
Std. Rebuild Kit43-803112T 1 18-2257
Complete Service Kit43-803119T 1 18-2364
1.84:1/ 1.81:1 Gear Set (tooth count& 17/19)43-75325A3 18-2204
Std. Rebuild Kit43-803114T 1 18-2258
Complete Service Kit43-803120 T 1 18-2365
1.98:1/ 1.94:1 Gear Set (tooth count& 20/24)43-55778A3 18-2205
Std. Rebuild Kit43-803101T 1 18-2259
Complete Service Kit43-803118T 1 18-2363
23aUpper Unit Gear SetAlpha One Gen II coverage (0L100009 & UP)
1.47:1 Gear Set (tooth count& 20/22)43-853641A2 18-6351
Std. Rebuild Kit
Complete Service Kit43-803103T 1N/A
1.62:1 & 2.0:1 Gear Set (tooth count& 24/24)43-853640A2 18-6350
Std. Rebuild Kit
Complete Service Kit43-803104T 1N/A
1.81:1 Gear Set (tooth count& 17/19)43-853643A2 18-6353
Std. Rebuild Kit
Complete Service Kit43-803105T 1N/A
1.94 & 2.4:1 Gear Set (tooth count& 20/24)43-853642A2 18-6352
Std. Rebuild Kit
Complete Service Kit43-803106T 1NA
24Roller Bearing (All but 1.47:1 ratio)31-35990A 1 18-1161
24aRoller Bearing (1.47:1 Ratio only)31-32573A 1 18-1142
25Washer12-45810 18-3712
26Nut11-22339 18-3713
27Shim15-36178A1 18-2293
28Plug861738NSS
29Drive Shaft, Upper (F680000 & Up)45-55796-1 18-2324
30Bearing Assembly
30aF680000 & UP (small bearing)31-32575A1 18-1179
30bD494569 - F679999 (large bearing)31-61100A1 18-1165
31Shim Set
31aD494569 -F67999915-45691A1 18-2283
31bF680000 & UP15-32563A1 18-2282
32O-Ring25-32546* 18-7161
33Cover Assembly, Top (F680000 & UP)828692A1 18-2382
34O-ring (2 per)25-25439* 18-7153
34aO-ring25-35027 18-7117
35Screw10-98794 18-3231
36Check Valve Kit, Oil Passage24-17997A1 18-2715 KIT
37Oil Seal (Included in kit)24-17997A1NSS
38Ball (Included in kit)24-17997A1NSS
39Spring (Included in kit)24-17997A1NSS
40Anodic Plate Assembly821629A1 18-6080
41Lockwasher N/A
42Screw N/A
Complete Gen II gearcase assy. OL100009 & UP Listing:
1547-861063A 12 18-2416
1547-861063A 10 18-2417
1547-861063A 8 18-2418
1547-861063A 6 18-2419
*Included in Seal Kit 18-2644
1Sold in sets only. For proper gear ratio selection, consult a service manual.
N/ANot Available

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2419 complete upper unit assy

Our Price: $2688.99
Compare at $3139.00



Replaces OEM part #

  • MERCURY MARINE 1547-861063A6
For: Mercruiser Gen II Upper (1998-up), 0L100040-up, 1.94/2.40:1 Ratios(Covers all Gen II applications from 1991-04)
Used with: 18-2411 Drive Shaft Housing Assembly

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-1160 bearing kit

Our Price: $106.99
Compare at $124.00



Replaces OEM part #

  • MERCURY MARINE 31-35988A2
  • MERCURY MARINE 31-35988A12

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2259 upper gear set

Our Price: $422.99
Compare at $494.00



Replaces OEM part #

  • MERCURY MARINE 43-803101T1
For: Mercruiser 120/140 Drives with 1.91:1 Gear Ratio.
Kit Contains:
    (1) 18-2205 Gear Set - replaces O.E. # 43-55778A3
    (1) 18-2648 Seal Kit - replaces O.E. # 26-32511A2
    (1) 18-2619-1 Outdrive Gasket Set - replaces O.E. # 27-94996A1
    (1) 18-2820 Drive Shaft Housing to Bell Housing Gasket - replaces O.E. # 27-64818
    (1) 18-1160 Bearing - replaces O.E. # 31-35988A2
    (1) 18-1161 Bearing - replaces O.E. # 31-35990A1
    (1) 18-1165 Bearing - replaces O.E. # 31-61100A1
    (1) 18-2743 Drive Shaft Housing to Bell Housing Gasket - replaces O.E. # 27-94996-2

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-4296 upper housing ring

Our Price: $9.99
Compare at $11.49



Replaces OEM part #

  • MERCURY MARINE 35983
For Upper Housing

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mercruiser u-joints

Sierra 18-2097 U-Joint
Part # 18-2097
Our Price: $59.99
Compare at $69.99



Replaces OEM part #

  • MERCURY MARINE 805536A2
For: Mercruiser Generation II F680000 & UP

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-6352 upper gear kit

Our Price: $280.99
Compare at $329.00



Replaces OEM part #

  • MERCURY MARINE 43-853642A2
For: Mercruiser Alpha I (Gen II ) (1998-up) Serial Number range 0L100040-up, with gear ratios 1.94:1, 2.40:1 (20-24 Teeth)

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2324 drive shaft, upper unit

Our Price: $90.99
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Replaces OEM part #

  • MERCURY MARINE 45-55796-1
For: Mercruiser Gen II (S/N OF680000 & UP)

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2358 gear housing service kit

Our Price: $500.99
Compare at $589.00



Replaces OEM part #

  • MERCURY MARINE 43-803102T1
For: Mercruiser drives with 20-22 Teeth: 1.50:1 Gear Ratios(1.47:1*)
* Gen II applications serial number range up to OK999999 only

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2417 complete upper unit assy

Our Price: $2688.99
Compare at $3139.00



Replaces OEM part #

  • MERCURY MARINE 1547-861063A10
For: Mercruiser Gen II Upper (1998-up), 0L100040 & up, 1.62/2.00:1Ratios (Covers all Gen II applications from 1991-04)
Used with: 18-2411 Drive Shaft Housing Assembly

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2204 upper unit gear set

Our Price: $246.99
Compare at $289.00



Replaces OEM part #

  • MERCURY MARINE 43-75325A3
For:
    Mercruiser V-6 and 470/485 (4 Cyl. etc.) and Gen II (S/N K999999 & BELOW) with 1.84:1 Gear Ratio (Drive Gear = 17 teeth, Driven Gear = 19 teeth).

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mercruiser carrier nut washers

Our Price: $1.99



Replaces OEM part #

  • MERCURY MARINE 12-45810

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mercruiser carrier assembly oil seals

Our Price: $36.99
Compare at $42.49



Replaces OEM part #

  • MERCURY MARINE 66081A2

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mercruiser drain screw gaskets

Our Price: $1.99



Replaces OEM part #

  • OMC 307552
  • MERCURY MARINE 12-19183
  • MERCURY MARINE 12-19183 2
  • MERCURY MARINE 12-20260
Package of 2
Used in most lower units and sea water pumps
Used with 18-2244 Drain Screw

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2293 shim kit

Sierra 18-2293 Shim Kit
Part # 18-2293
Our Price: $5.99
Compare at $6.99



Replaces OEM part #

  • MERCURY MARINE 15-36178A-1
Upper Bearing Shims
Kit Contains: (1) each .002, .003, .015, & (2) each .010 shims

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-1165 tapered roller bearing

Our Price: $18.99
Compare at $21.49



Replaces OEM part #

  • MERCURY MARINE 31-61100A1

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2382 cap upper drive unit gen ii

Our Price: $150.99
Compare at $179.00



Replaces OEM part #

  • MERCURY MARINE 828692A1
For: Mercruiser Gen II (S/N OF680000 & UP)

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2411 upper unit housing

Our Price: $736.99
Compare at $864.00



Replaces OEM part #

  • MERCURY MARINE 1547-861063A4
For: Mercruiser Gen II Upper (1998-up), 0L100040-up, 1.47:1 Ratio/Gen II Upper (1998-up) 0L100040-up, 1.62/2.00:1 Ratio’s/Gen II Upper (1998-up), 0L100040-up, 1.81:1 Ratio/Gen II Upper (1998-up), 0L100040-up, 1.94/2.40:1 Ratios
Used with: 18-2416, 18-2417, 18-2418, 18-2419 Complete Upper Gear Cases

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-7161 o-ring

Sierra 18-7161 O-Ring
Part # 18-7161
Our Price: $7.99
Compare at $8.99



Dimensions ( in )
I.D. 3.250
Width .070

Replaces OEM part #

  • MERCURY MARINE 25-32546
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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-6351 upper gear kit

Our Price: $340.99
Compare at $399.00



Replaces OEM part #

  • MERCURY MARINE 43-853641A2
For: Mercruiser Alpha I (Gen II) (1998-up) Serial Number range 0L100040-UP, for gear ratios 1.47:1 (20-22 Teeth).

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2174  u-joint

Sierra 18-2174 U-Joint *
Part # 18-2174
Our Price: $34.19
Compare at $47.49



Replaces OEM part #

  • MERCURY MARINE 75835T1
  • MERCURY MARINE 75832T 1
  • MERCURY MARINE 75832A3
  • MERCURY MARINE 758321
  • OMC 915717
  • OMC 3850812
  • VOLVO 3850812
For: OMC Cobra and King Cobra Drives (1990 & above), and Mercruiser ALPHA I Units S/N B418819 & above, ALPHA I SS & BRAVO.
Includes straight grease fitting and 90 degree fitting (Rockwell)
For: Volvo 3.0L GS, GL, 4.3L GL, GS, GI, 5.0L GL, GI, 5.7L GL, GI, 5.8 FL, FI, FSI

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2644 gear housing seal kit

Our Price: $20.99
Compare at $31.49



Replaces OEM part #

  • MERCURY MARINE 26-88397A1
For: Mercruiser ALPHA I GENERATION II
Kit Contains:
    (1) 18-2944 Oil Passage Quad Seal - replaces O.E. # 26-455771
    (1) 18-2945 Drain Screw Gasket - replaces O.E. # 12-19183 3
    (1) 18-7188 Drain Screw O-Ring - replaces O.E. # 26-805726
    (1) 18-7169 O-Ring - replaces O.E. # 25-70937
    (1) 18-7161 O-Ring - replaces O.E. # 25-32546
    (2) 18-7420 O-Ring - replaces O.E. # 25-25439
    (2) 18-7103 O-Ring - replaces O.E. # 25-29845
    (1) 18-7117 O-Ring - replaces O.E. # 25-35027
    (2) 18-2056 Oil Seal - replaces O.E. # 26-66302
    (1) 18-2003 Oil Seal - replaces O.E. # 26-823894
    (1) NSS Water Tube Seal - replaces O.E. # 26-88397
    (1) 18-3289 Double Lip Seal - replaces O.E. # 26-864319
    (1) 18-2715 Spring Kit - replaces O.E. # 24-17997A1

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-6402 u-joint assy

Our Price: $418.99
Compare at $489.00



Replaces OEM part #

  • MERCURY MARINE 864281A2
For: Mercruiser Alpha I (Gen II) (1998 & up) (OL100040 & up) GKN Style

Low Price Guarantee
mercruiser drive gear shim kits

Sierra 18-2292 Shim Kit
Part # 18-2292
Our Price: $7.99
Compare at $9.49



Replaces OEM part #

  • MERCURY MARINE 15-35980A-1
Drive Gear Shims
Kit Contains: (1) each .002, .003, .005, .005, .010, & .025 shims

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2125 yoke assembly

Our Price: $56.99
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Replaces OEM part #

  • MERCURY MARINE 46020T
  • MERCURY MARINE 46021 1
For: Mercruiser #1/Alpha Units (S/N 1684188 - OK999999)

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mercruiser upper unit gear sets

Our Price: $321.99
Compare at $379.00



Replaces OEM part #

  • MERCURY MARINE 43-18410A2
  • MERCURY MARINE 43-18411A2
For:
    Most Mercruiser V-8 Drives and Gen II(S/N OK999999 & Below) with 1.5:1 Gear Ratio(Drive Gear = 22 teeth, Driven Gear = 20 teeth). Also fits Mercruiser stern drive models: 225 (S/N 3856268 - 4200499), 260 (S/N 4898730 - 6225576), 898/228 (S/N 4782330 - 6225576), 888 (S/N 3106717 & UP), V8/MR/Alpha One (S/N 6225577 & UP).
Kit Includes:
    (1) 18-1142 Upper Pinion Bearing - replaces O.E. # 31-32573A1

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-1142 upper pinion bearing

Our Price: $35.99
Compare at $41.99



Replaces OEM part #

  • MERCURY MARINE 31-32573A1

Low Price Guarantee
mercruiser sterndrive drive shaft housing components exploded view-sierra 18-3221 water tube

Sierra 18-3221 Water Tube
Part # 18-3221
Our Price: $9.99
Compare at $11.49



Replaces OEM part #

  • MERCURY MARINE 32-860220
For Gen ll

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mercruiser upper cap bearings

Our Price: $24.99
Compare at $28.99



Replaces OEM part #

  • OMC 983891
  • MERCURY MARINE 31-35990A1

Low Price Guarantee
mercruiser sterndrive drive shaft housing components exploded view-sierra 18-1182 roller bearing kit

Our Price: $86.99
Compare at $104.00



Replaces OEM part #

  • MERCURY MARINE 31-30894A5
For: Mercruiser Alpha I (Gen II) (1998 & up) (OL100040 & up)

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-6080 anode

Sierra 18-6080 Anode
Part # 18-6080
Our Price: $20.99
Compare at $23.99



Replaces OEM part #

  • MERCURY MARINE 821629A1
  • MERCURY MARINE 821629Q1
  • MERCURY MARINE 821629T1
Zinc
For: Alpha One (Gen II) (1991 & UP)

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omc sterndrive/cobra u-joint center socket

Our Price: $54.99
Compare at $63.99



Replaces OEM part #

  • MERCURY MARINE 39383 1
  • MERCURY MARINE 39383T
  • OMC 912213
For: All OMC Cobra & Mercruiser IA/IB/IC & EZ, MC-I, R, MR, Alpha One, Gen II (OL949778 & below), Bravo (OM111207 & below), MC II & TS

Low Price Guarantee
mercruiser sterndrive drive shaft housing components exploded view-sierra 18-7117 o-rings

Sierra 18-7117 O-Rings
Part # 18-7117
Our Price: $0.99



Dimensions ( in )
I.D. 1.060
Width: .135

Replaces OEM part #

  • OMC 303360
  • MERCURY MARINE 25-35027
Low Price Guarantee
mercruiser sterndrive drive shaft housing components exploded view-sierra 18-1179 bearing, upper drive cap

Our Price: $18.99
Compare at $21.49



Replaces OEM part #

  • MERCURY MARINE 31-32575T1
  • MERCURY MARINE 31-32575A1
For: Mercruiser Gen II F680000 & UP

Low Price Guarantee
mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2365 gear housing service kit

Our Price: $447.99
Compare at $524.00



Replaces OEM part #

  • MERCURY MARINE 43-803120T1
For: Mercruiser Drives with 17-19 Teeth: 1.84:1 Gear Ration (1.81:1*)
* Gen II applications serial number range up to OK999999 only

Low Price Guarantee
mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2363 gear housing service kit

Our Price: $442.99
Compare at $519.00



Replaces OEM part #

  • MERCURY MARINE 43-803118T1
For: Mercruiser Drives with 20-24 Teeth: 1.98:1 Gear Ratios (1.94/2.40:1*)
* Gen II applications serial number range up to OK999999 only

Low Price Guarantee
mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2296 shims

Sierra 18-2296 Shims
Part # 18-2296
Our Price: $2.99
Compare at $3.29



Replaces OEM part #

  • MERCURY MARINE 15-71013
Shim Size: .055

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2003 oil seal

Sierra 18-2003 Oil Seal
Part # 18-2003
Our Price: $14.99
Compare at $16.49



Shaft Size - 2.250"
Outer Diameter - 3.000"
Width - 0.437

Replaces OEM part #

  • MERCURY MARINE 26-68493
  • MERCURY MARINE 26-823894
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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-3231 upper drive shaft top cover screw

Our Price: $1.99
Compare at $2.29



Replaces OEM part #

  • MERCURY MARINE 10-98794

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2205 upper unit gear set

Our Price: $232.99
Compare at $274.00



Replaces OEM part #

  • MERCURY MARINE 43-55778A3
For:
    120/140 (S/N 2791957 & UP) and Gen II (S/N K999999 & BELOW) with 1.98:1 Gear Ratio (Drive Gear = 20 teeth Driven Gear = 24 teeth).

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2282 shim kit

Sierra 18-2282 Shim Kit
Part # 18-2282
Our Price: $5.99
Compare at $6.99



Replaces OEM part #

  • MERCURY MARINE 15-32563A1
Kit Contains: (1) each .002, .003, .005, .010, & .025 shims

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2146 long yoke

Sierra 18-2146 Long Yoke
Part # 18-2146
Our Price: $96.99
Compare at $114.00



Replaces OEM part #

  • MERCURY MARINE 59830A1
  • MERCURY MARINE 59830A 7
  • OMC 912212
  • OMC 3850815
For: All OMC Cobra (1986-Up) & all Mercruiser #1, R, MR, Aplha I, Alpha I Gen II, Bravo & Blackhawk

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mercruiser sterndrive drive shaft housing components exploded view-sierra 18-2256 upper gear set

Our Price: $462.99
Compare at $544.00



Replaces OEM part #

  • MERCURY MARINE 43-803116T1
For: Most Mercruiser V-8 Drives with (1.5:1)
Kit Contains:
    (1) 18-2201 Upper Unit Gear Set - replaces O.E. # 43-18410A2
    (1) 18-2648 Seal Kit - replaces O.E. # 26-32511A2
    (1) 18-2619-1 Outdrive Gasket Set - replaces O.E. # 27-94996A1
    (1) 18-2820 Drive Shaft H