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Best Seller
Sierra International 18-9856 Drive Gear Shimming Tool 18-9856

Sierra International 18-9856 Drive Gear Shimming Tool 18-9856

Sierra International 18-9856 Drive Gear Shimming Tool 18-9856. Designed for use with Mercruiser MC-I R-MR Alpha I and Alpha I/Gen II drive units. Includes one drive gear shimming tool per package. It is interchangeable with GLM 90180 and Mercury Marine... ... more

Sierra International 18-9856 Drive Gear Shimming Tool 18-9856

Sierra International 18-9856 Drive Gear Shimming Tool 18-9856. Designed for use with Mercruiser MC-I R-MR Alpha I and Alpha I/Gen II drive units. Includes one drive gear shimming tool per package. It is interchangeable with GLM 90180 and Mercury Marine...

Optics Planet

$421.25

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Sierra International Upper Drive Shaft Gear Repair Kit 18-2256

Sierra International Upper Drive Shaft Gear Repair Kit 18-2256

Sierra International Upper Drive Shaft Gear Repair Kit 18-2256. Features a ratio of 1.5:1. The kit contains: (1) Sierra 18-1142 Upper Pinion Bearing (1) Sierra 18-1160 Drive Bearing Kit (1) Sierra 18-1165 Tapered Roller Bearing (1) Sierra 18-2201 Upper... ... more

Sierra International Upper Drive Shaft Gear Repair Kit 18-2256

Sierra International Upper Drive Shaft Gear Repair Kit 18-2256. Features a ratio of 1.5:1. The kit contains: (1) Sierra 18-1142 Upper Pinion Bearing (1) Sierra 18-1160 Drive Bearing Kit (1) Sierra 18-1165 Tapered Roller Bearing (1) Sierra 18-2201 Upper...

Optics Planet

$783.45

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Best Seller
Sierra International Drive Shaft Preload Tool 18-9874

Sierra International Drive Shaft Preload Tool 18-9874

Sierra International Drive Shaft Preload Tool 18-9874. It is designed for use with Mercruiser MC-I R-MR Alpha I and Alpha I/Gen II stern drives and outboards. Includes one drive shaft preload tool per package. It is interchangeable with Mercury Marine... ... more

Sierra International Drive Shaft Preload Tool 18-9874

Sierra International Drive Shaft Preload Tool 18-9874. It is designed for use with Mercruiser MC-I R-MR Alpha I and Alpha I/Gen II stern drives and outboards. Includes one drive shaft preload tool per package. It is interchangeable with Mercury Marine...

Optics Planet

$395.16

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Sierra International Upper Unit Gear Set 1.98-1 Ratio 18-2205

Sierra International Upper Unit Gear Set 1.98-1 Ratio 18-2205

Sierra International Upper Unit Gear Set 1.98-1 Ratio 18-2205. 98:1 ratio. Designed for use with Mercruiser 120/140 (s/n 2791957 & Up) and Alpha Gen II (s/n 0K999999 & Below) drive units. The set includes one drive gear and one driven gear per package.... ... more

Sierra International Upper Unit Gear Set 1.98-1 Ratio 18-2205

Sierra International Upper Unit Gear Set 1.98-1 Ratio 18-2205. 98:1 ratio. Designed for use with Mercruiser 120/140 (s/n 2791957 & Up) and Alpha Gen II (s/n 0K999999 & Below) drive units. The set includes one drive gear and one driven gear per package....

Optics Planet

$791.70

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Sierra International 18-2360 Forward Gear Set 18-2360

Sierra International 18-2360 Forward Gear Set 18-2360

Sierra International 18-2360 Forward Gear Set 18-2360. The set includes (1) Forward Gear and (1) Pinion Gear. Interchangeable with Mallory 9-73561 GLM 22631 OMC Stern Drive 985050 and Johnson/Evinrude Outboard 434063 436746 and 985050. Each Sierra... ... more

Sierra International 18-2360 Forward Gear Set 18-2360

Sierra International 18-2360 Forward Gear Set 18-2360. The set includes (1) Forward Gear and (1) Pinion Gear. Interchangeable with Mallory 9-73561 GLM 22631 OMC Stern Drive 985050 and Johnson/Evinrude Outboard 434063 436746 and 985050. Each Sierra...

Optics Planet

$825.42

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Sierra International 18-2218 Forward Gear Set 18-2218

Sierra International 18-2218 Forward Gear Set 18-2218

Sierra International 18-2218 Forward Gear Set 18-2218. The set includes (1) Forward Gear and (1) Pinion Gear. Interchangeable with Mallory 9-73561 GLM 22631 OMC Stern Drive 985050 and Johnson/Evinrude Outboard 434063 436746 and 985050. Each Sierra... ... more

Sierra International 18-2218 Forward Gear Set 18-2218

Sierra International 18-2218 Forward Gear Set 18-2218. The set includes (1) Forward Gear and (1) Pinion Gear. Interchangeable with Mallory 9-73561 GLM 22631 OMC Stern Drive 985050 and Johnson/Evinrude Outboard 434063 436746 and 985050. Each Sierra...

Optics Planet

$847.14

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Sierra International 18-2204 Upper Unit Gear Set 18-2204

Sierra International 18-2204 Upper Unit Gear Set 18-2204

Sierra International 18-2204 Upper Unit Gear Set 18-2204. Features a ratio of 1.5:1. It is interchangeable with GLM 11210 and Mercruiser Stern Drive 43-18410A2 43-18411A2 43-59832A2 and 43-59832A4. Each Sierra product meets or exceeds the original... ... more

Sierra International 18-2204 Upper Unit Gear Set 18-2204

Sierra International 18-2204 Upper Unit Gear Set 18-2204. Features a ratio of 1.5:1. It is interchangeable with GLM 11210 and Mercruiser Stern Drive 43-18410A2 43-18411A2 43-59832A2 and 43-59832A4. Each Sierra product meets or exceeds the original...

Optics Planet

$791.70

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Sierra International Complete Upper Gear Housing w/ 21-16 Ratio For OMC 5.7L/5.8L 18-4804

Sierra International Complete Upper Gear Housing w/ 21-16 Ratio For OMC 5.7L/5.8L 18-4804

Sierra International Complete Upper Gear Housing w/ 21-16 Ratio For OMC 5.7L/5.8L 18-4804. 7L (1986-1993) and 5.8L (1986-1989 1991-1993) I/O engines. The gear housing features a 21:16 ratio. It is interchangeable with OMC Stern Drive 983888 984770... ... more

Sierra International Complete Upper Gear Housing w/ 21-16 Ratio For OMC 5.7L/5.8L 18-4804

Sierra International Complete Upper Gear Housing w/ 21-16 Ratio For OMC 5.7L/5.8L 18-4804. 7L (1986-1993) and 5.8L (1986-1989 1991-1993) I/O engines. The gear housing features a 21:16 ratio. It is interchangeable with OMC Stern Drive 983888 984770...

Optics Planet

$4,305.78

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Sierra International Complete Upper Gear Housing w/ 21-18 Ratio For OMC 2.5L/3.0L/5.0L 18-4805

Sierra International Complete Upper Gear Housing w/ 21-18 Ratio For OMC 2.5L/3.0L/5.0L 18-4805

Sierra International Complete Upper Gear Housing w/ 21-18 Ratio For OMC 2.5L/3.0L/5.0L 18-4805. 5L (1986-1989) 3.0L (1986-1993) and 5.0L (1989-1993) I/O engines. The gear housing features a 21:18 ratio. It is interchangeable with OMC Stern Drive 983885... ... more

Sierra International Complete Upper Gear Housing w/ 21-18 Ratio For OMC 2.5L/3.0L/5.0L 18-4805

Sierra International Complete Upper Gear Housing w/ 21-18 Ratio For OMC 2.5L/3.0L/5.0L 18-4805. 5L (1986-1989) 3.0L (1986-1993) and 5.0L (1989-1993) I/O engines. The gear housing features a 21:18 ratio. It is interchangeable with OMC Stern Drive 983885...

Optics Planet

$4,412.63

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Sierra International Upper Drive Shaft Assembly 18-2326

Sierra International Upper Drive Shaft Assembly 18-2326

Sierra International Upper Drive Shaft Assembly 18-2326. Includes one upper drive shaft assembly per package. It is interchangeable with GLM 22433 and Johnson/Evinrude Outboard 436232. Each Sierra product meets or exceeds the original equipment part it... ... more

Sierra International Upper Drive Shaft Assembly 18-2326

Sierra International Upper Drive Shaft Assembly 18-2326. Includes one upper drive shaft assembly per package. It is interchangeable with GLM 22433 and Johnson/Evinrude Outboard 436232. Each Sierra product meets or exceeds the original equipment part it...

Optics Planet

$364.90

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Sierra International 18-2277 Lower Drive Shaft 18-2277

Sierra International 18-2277 Lower Drive Shaft 18-2277

Sierra International 18-2277 Lower Drive Shaft 18-2277. For: Cobra Drives 262 302 350 432 434 502 504 574 584. Interchangeable with OMC Stern Drive 911693. Each Sierra product meets or exceeds the original equipment part it replaces. Features of Sierra... ... more

Sierra International 18-2277 Lower Drive Shaft 18-2277

Sierra International 18-2277 Lower Drive Shaft 18-2277. For: Cobra Drives 262 302 350 432 434 502 504 574 584. Interchangeable with OMC Stern Drive 911693. Each Sierra product meets or exceeds the original equipment part it replaces. Features of Sierra...

Optics Planet

$242.72

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Sierra International 18-2185 Drive Shaft 18-2185

Sierra International 18-2185 Drive Shaft 18-2185

Sierra International 18-2185 Drive Shaft 18-2185. Includes one drive shaft per package. It is interchangeable with GLM 22410 and OMC Stern Drive 908086 909114 and 909753. Each Sierra product meets or exceeds the original equipment part it replaces.... ... more

Sierra International 18-2185 Drive Shaft 18-2185

Sierra International 18-2185 Drive Shaft 18-2185. Includes one drive shaft per package. It is interchangeable with GLM 22410 and OMC Stern Drive 908086 909114 and 909753. Each Sierra product meets or exceeds the original equipment part it replaces....

Optics Planet

$226.94

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Sierra International Engine Alignment Tool 18-4442

Sierra International Engine Alignment Tool 18-4442

Sierra International Engine Alignment Tool 18-4442. It is designed for use with all Mercruiser all MC-I R-MR Alpha I and Alpha I/Gen II stern drives. It is also used for OMC Cobra stern drives. Includes one engine alignment tool per package. It is... ... more

Sierra International Engine Alignment Tool 18-4442

Sierra International Engine Alignment Tool 18-4442. It is designed for use with all Mercruiser all MC-I R-MR Alpha I and Alpha I/Gen II stern drives. It is also used for OMC Cobra stern drives. Includes one engine alignment tool per package. It is...

Optics Planet

$192.12

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Sierra International 18-5946 Alternator 18-5946

Sierra International 18-5946 Alternator 18-5946

Sierra International 18-5946 Alternator 18-5946. It is equipped with a fan and serpentine drive pulley. Rated SAE J1171. Each Sierra product meets or exceeds the original equipment part it replaces. Features of Sierra International 185946 185946... ... more

Sierra International 18-5946 Alternator 18-5946

Sierra International 18-5946 Alternator 18-5946. It is equipped with a fan and serpentine drive pulley. Rated SAE J1171. Each Sierra product meets or exceeds the original equipment part it replaces. Features of Sierra International 185946 185946...

Optics Planet

$222.33

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Sierra International 18-1317 Main Bearing Complete Engine Set 18-1317

Sierra International 18-1317 Main Bearing Complete Engine Set 18-1317

Sierra International 18-1317 Main Bearing Complete Engine Set 18-1317. It is interchangeable with Mercruiser Stern Drive 23-801793. Each Sierra product meets or exceeds the original equipment part it replaces. Features of Sierra International Main... ... more

Sierra International 18-1317 Main Bearing Complete Engine Set 18-1317

Sierra International 18-1317 Main Bearing Complete Engine Set 18-1317. It is interchangeable with Mercruiser Stern Drive 23-801793. Each Sierra product meets or exceeds the original equipment part it replaces. Features of Sierra International Main...

Optics Planet

$210.95

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Sierra International 18-5967 Alternator 18-5967

Sierra International 18-5967 Alternator 18-5967

Sierra International 18-5967 Alternator 18-5967. It is interchangeable with Arco 60055 GLM 11610 Mallory 9-19102 Mercruiser Stern Drive 807652T and MES 3145M. Each Sierra product meets or exceeds the original equipment part it replaces. Features of... ... more

Sierra International 18-5967 Alternator 18-5967

Sierra International 18-5967 Alternator 18-5967. It is interchangeable with Arco 60055 GLM 11610 Mallory 9-19102 Mercruiser Stern Drive 807652T and MES 3145M. Each Sierra product meets or exceeds the original equipment part it replaces. Features of...

Optics Planet

$333.48

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Sierra International 18-5960 Alternator 18-5960

Sierra International 18-5960 Alternator 18-5960

Sierra International 18-5960 Alternator 18-5960. It is interchangeable with Arco 60060 Mallory 9-19104 Mercruiser Stern Drive 807653T and MES 3146M. Each Sierra product meets or exceeds the original equipment part it replaces. Features of Sierra... ... more

Sierra International 18-5960 Alternator 18-5960

Sierra International 18-5960 Alternator 18-5960. It is interchangeable with Arco 60060 Mallory 9-19104 Mercruiser Stern Drive 807653T and MES 3146M. Each Sierra product meets or exceeds the original equipment part it replaces. Features of Sierra...

Optics Planet

$351.86

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Sierra International 18-6844 Alternator 18-6844

Sierra International 18-6844 Alternator 18-6844

Sierra International 18-6844 Alternator 18-6844. It is interchangeable with Denso 101211-3460 Mallory 9-19203 Mercruiser Stern Drive 834832T2 857006A3 and Mercury Marine 834832 857006T. Each Sierra product meets or exceeds the original equipment part... ... more

Sierra International 18-6844 Alternator 18-6844

Sierra International 18-6844 Alternator 18-6844. It is interchangeable with Denso 101211-3460 Mallory 9-19203 Mercruiser Stern Drive 834832T2 857006A3 and Mercury Marine 834832 857006T. Each Sierra product meets or exceeds the original equipment part...

Optics Planet

$466.81

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Sierra International 18-2768 Transom Seal 18-2768

Sierra International 18-2768 Transom Seal 18-2768

Sierra International 18-2768 Transom Seal 18-2768. Includes one transom seal per package. It is interchangeable with Volvo Penta 3852550 and OMC Stern Drive 3852550 and 911797. Each Sierra product meets or exceeds the original equipment part it... ... more

Sierra International 18-2768 Transom Seal 18-2768

Sierra International 18-2768 Transom Seal 18-2768. Includes one transom seal per package. It is interchangeable with Volvo Penta 3852550 and OMC Stern Drive 3852550 and 911797. Each Sierra product meets or exceeds the original equipment part it...

Optics Planet

$194.74

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Sierra International Yl Style Point Type Distributor For Ford 302 Cid V8 Engines Conventional Rotation 18-5309-1

Sierra International Yl Style Point Type Distributor For Ford 302 Cid V8 Engines Conventional Rotation 18-5309-1

Sierra International Yl Style Point Type Distributor For Ford 302 Cid V8 Engines Conventional Rotation 18-5309-1. This proven ignition system drives both original equipment and high performance coils. Stabilized points eliminate point float and bounce.... ... more

Sierra International Yl Style Point Type Distributor For Ford 302 Cid V8 Engines Conventional Rotation 18-5309-1

Sierra International Yl Style Point Type Distributor For Ford 302 Cid V8 Engines Conventional Rotation 18-5309-1. This proven ignition system drives both original equipment and high performance coils. Stabilized points eliminate point float and bounce....

Optics Planet

$703.27

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Sierra International 18-2767 Transom Seal 18-2767

Sierra International 18-2767 Transom Seal 18-2767

Sierra International 18-2767 Transom Seal 18-2767. Includes one transom seal per package. It is interchangeable with Volvo Penta 3852550 and OMC Stern Drive 3852550 and 911797. Each Sierra product meets or exceeds the original equipment part it... ... more

Sierra International 18-2767 Transom Seal 18-2767

Sierra International 18-2767 Transom Seal 18-2767. Includes one transom seal per package. It is interchangeable with Volvo Penta 3852550 and OMC Stern Drive 3852550 and 911797. Each Sierra product meets or exceeds the original equipment part it...

Optics Planet

$174.75

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Sierra International 18-6948 Alternator 18-6948

Sierra International 18-6948 Alternator 18-6948

Sierra International 18-6948 Alternator 18-6948. 7 MI 120 I/L4 CMD 1.7 MS 120 I/L4 and D1.7L DTI engines. It is interchangeable with Mercruiser Stern Drive 882571 and 8M0084523. Each Sierra product meets or exceeds the original equipment part it... ... more

Sierra International 18-6948 Alternator 18-6948

Sierra International 18-6948 Alternator 18-6948. 7 MI 120 I/L4 CMD 1.7 MS 120 I/L4 and D1.7L DTI engines. It is interchangeable with Mercruiser Stern Drive 882571 and 8M0084523. Each Sierra product meets or exceeds the original equipment part it...

Optics Planet

$624.34

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