Sierra / Mallory

Additional Details:

• Thread Size: 3/8" or 9.5mm - 16
• Note: Not to used on #1/R lower units
• Fits: Mercury/Mariner O/Bs of Japanese origin that use an 8x1.25 metric threaded screw
• Fits: Mercruiser I, R, MR, Alpha One, TR, TRS

Use With:

• 18-2945: Drain Screw Gasket
• 18-2945-9: Drain Screw Gasket (Priced Per Pkg of 2)
• 18-29451-9: Drain Screw Gasket (Priced Per Pkg of 50)

Interchanges/Replaces

Chrysler/Force/US Marine

• 22-67892
• 22-67892A1

GLM

• 21731

Mallory

• 9-72651

Mercruiser Stern Drive

• 10-14834
• 10-14834A1
• 22-67892
• 22-67892A06
• 22-67892A1
• 22-8M0058389

Mercury Marine

• 10-14834
• 10-14834A1
• 22-67892
• 22-67892A05
• 22-67892A06
• 22-67892A1

Sears

• 22-67892A1

Additional Details:

• Thread: M8-1.25

Use With:

• 18-4698: Drain Fill Washer

Interchanges/Replaces

Mallory

• 9-72653

Yamaha Outboard

• 90340-08002-00
• 90340-08014-00
• 90340-08125-00
• 90340-08M04-00

Additional Details:

• Used with: 3/8-16 drain/fill screw found on all MerCruiser and most Mercury/Mariner O/B's
• Used in: most lower units and sea water pumps

Use With:

• 18-2944: Seal Ring Gasket

Interchanges/Replaces

Chrysler/Force/US Marine

• 12-19183
• F50556
• F8077
• F8186

Johnson/Evinrude Outboard

• 307552

Mallory

• 9-60101
• 9-60102

Mercruiser Stern Drive

• 12-19183
• 12-191832
• 12-191833
• 12-19183B
• 12-20260
• 12-20260B

Mercury Marine

• 12-19183
• 12-191832
• 12-191833
• 12-20260

Additional Details:

• Used with: 3/8-16 drain/fill screw found on all MerCruiser and most Mercury/Mariner O/B's
• Used in: most lower units and sea water pumps

Use With:

• 18-2944: Seal Ring Gasket

Interchanges/Replaces

Chrysler/Force/US Marine

• 12-19183
• F50556
• F8077
• F8186

Johnson/Evinrude Outboard

• 307552

Mallory

• 9-60101
• 9-60102

Mercruiser Stern Drive

• 12-19183
• 12-191832
• 12-191833
• 12-19183B
• 12-20260
• 12-20260B

Mercury Marine

• 12-19183
• 12-191832
• 12-191833
• 12-20260

Key Features:

• Used with most O.E.M. Manifolds

Additional Details:

• Material: Brass
• Size: 1/4" NPT or 6.4mm
• Fits: MerCruiser cylinder blocks & exhaust manifolds

Interchanges/Replaces

GLM

• 13993

Mallory

• 9-41201

Mercruiser Stern Drive

• 22-16951A1
• 22-16951Q1
• 22-16951T1
• 22-16951T1
• 22-64426
• 22-87238

OMC Inboard

• 379957

OMC Stern Drive

• 379957

Volvo Penta

• 82745

Use With:

• 18-2387: Lower Unit Drain/Fill Screw

Interchanges/Replaces

Johnson/Evinrude Outboard

• 311598

Mallory

• 9-60408

OMC Stern Drive

• 311598
• 3852105

Volvo Penta

• 3852105

Use With:

• 18-2387: Lower Unit Drain/Fill Screw

Interchanges/Replaces

Johnson/Evinrude Outboard

• 311598

Mallory

• 9-60408

OMC Stern Drive

• 311598
• 3852105

Volvo Penta

• 3852105

Additional Details:

• Fits: IA/IB/IC & EZ Shift, MC-I, R, MR, Alpha One & Gen II (s/n 0K999999 & Below) (1964-1997)

Interchanges/Replaces

GLM

• 21520

Mallory

• 9-75123

Mercruiser Stern Drive

• 31-35988A12
• 31-35988A2

Additional Details:

• Fits: Alpha One Gen II (1991 & Newer) and Vazer

Interchanges/Replaces

GLM

• 89180

Mallory

• 9-72704

Mercruiser Stern Drive

• 816431A1

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-1728	Mallory 9-73117 Mercruiser Stern Drive 816607	1	Bellow Flange Ring		N/A
9-73116	Mercruiser Stern Drive 54-86049	1	BELLOWS GROUND CLIP		N/A
18-710-72-2	Mercruiser Stern Drive 54-31765 54-815504372	1	Hose Clamp-4-1/16 TO 5		N/A

Interchanges/Replaces

GLM

• 89030

Mallory

• 9-72710

Volvo Penta

• 875826
• 876294

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-710-64		1	Hose Clamp 3 9/16 To 4 1/2		N/A
18-710-80		1	Hose Clamp 4 9/16 To 5 1/2		N/A

Key Features:

• Measures upper drive gear clearance on MC-I, R-MR, Alpha One and Alpha One/Gen II drive units

Interchanges/Replaces

GLM

• 90170

Mercury Marine

• 91-60523

Interchanges/Replaces

GLM

• 22412

OMC Stern Drive

• 909121

Interchanges/Replaces

GLM

• 22410

OMC Stern Drive

• 908086
• 909114
• 909753

Key Features:

• Presses bearing cone onto Alpha One/Gen II drive shaft housing pinion gear

Interchanges/Replaces

Mercury Marine

• 91-90774

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2343	Chrysler/Force/US Marine 12-92721 12-F694186 GLM 32800 Mallory 9-78108 Mercruiser Stern Drive 12-92721 Mercury Marine 12-92721	1	Pinion Nut Washer		N/A
18-3719	Chrysler/Force/US Marine 11-35921 11-826375 11-F694188 GLM 11190 Johnson/Evinrude Outboard 314730 Mallory 9-78103 Mercruiser Stern Drive 11-35921 Mercury Marine 11-35921 11-47411 11-826375 OMC Stern Drive 314730	1	Pinion Nut		N/A

Additional Details:

• O.D.: 1.474" or 37.4mm
• Shaft Size: 1.045" or 26.5mm
• Width: 0.187" or 4.7mm

Interchanges/Replaces

Chrysler/Force/US Marine

• 26-43036

GLM

• 85170

Honda Outboard

• 91254-ZW1-003

Mercury Marine

• 26-43036

Key Features:

• Removes and installs bearings

Additional Details:

• Compatible Outboard Gear Cases: MC-I, R-MR, Alpha One, Alpha One/Gen II, and all Bravo

Interchanges/Replaces

Mercury Marine

• 91-52393

Key Features:

• Removes and installs bearings

Additional Details:

• Compatible Outboard Gear Cases: MC-I, R-MR, Alpha One, Alpha One/Gen II, and all Bravo

Interchanges/Replaces

Mercury Marine

• 91-37311

Key Features:

• Removes and installs bearings

Additional Details:

• Compatible Outboard Gear Cases: MC-I, R-MR, Alpha One, Alpha One/Gen II, and all Bravo

Interchanges/Replaces

Mercury Marine

• 91-37312

Key Features:

• Removes and installs bearings

Additional Details:

• Compatible Outboard Gear Cases: MC-I, R-MR, Alpha One, Alpha One/Gen II, and all Bravo

Interchanges/Replaces

Mercury Marine

• 91-36379