Key Features:

• GM 181 cu. in. 3.0L, 4 cylinder / fits most 140 models

Use With:

• 18-0937: Carburetor Mounting Gasket
• 18-1922: Manifold Elbow
• 18-1972: Elbow
• 18-1975-1: Riser With Exhaust Tube
• 18-0114-1: Manifold End Gasket
• 18-1204-1: Exhaust Manifold Mounting Gasket
• 18-2861-1: Manifold End Cap Gasket

Interchanges/Replaces

Barr

• OMC-1-984054

GLM

• 51442

OMC Stern Drive

• 984054

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2875-1	Barr OMC47908013 GLM 33770 Mallory 9-65100 OMC Stern Drive 3850495 908013 Osco 0188-G Volvo Penta 3850495	1	Exhaust Elbow Gasket		N/A
18-4256	Mallory 9-40545	1	Pipe Plug		N/A
18-4218	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	1	Drain Tap		N/A
18-1204-1	Barr MC472796429 GLM 33570 Mallory 9-61419 Mercruiser Stern Drive 27-96429 OMC Stern Drive 912164 Osco MO4-GH	1	Exhaust Manifold Mounting Gasket		N/A
18-2861-1	Barr OMC47311121 GLM 33330 OMC Stern Drive 311121	1	Manifold End Cap Gasket		N/A
18-0114-1	Barr OMC47907761 GLM 32580 OMC Stern Drive 907761	1	Manifold End Gasket		N/A

Additional Details:

• Fits: Late model Mercruiser 4 cylinder engines
• Fits: MCM 2.5L & 3.0L/LX (1982 & newer)

Use With:

• 18-1901: Manifold
• 18-1954-1: Manifold
• 18-1955-1: Manifold
• 18-2748: Exhaust Boot
• 18-2833: Exhaust Elbow Gasket
• 18-8551: Hardware Kit [Exhaust Elbow Bolts]
• 18-2819-1: Exhaust Elbow Gasket
• 18-1956-3: Manifold

Interchanges/Replaces

Barr

• MC-20-12076

GLM

• 51160

Mallory

• 9-40555

Marine Power

• 6000-33A

Mercruiser Stern Drive

• 12076A1
• 12076A2
• 95864A2

Osco

• 2076

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2748	GLM 89120 Mallory 9-72805 Mercruiser Stern Drive 32-44348 32-44348001 32-44348T	1	Exhaust Boot		N/A
18-2833	Barr MC472799777 GLM 31520 Mallory 9-61407 Mercruiser Stern Drive 27-52076 27-99777 27-997771 27-997772 27-99777B2 Osco 52076	1	Exhaust Elbow Gasket		N/A
18-710-72-2	Mercruiser Stern Drive 54-31765 54-815504372	4	Hose Clamp-4-1/16 TO 5		N/A
18-8551	GLM 22445 Mallory 9-40585 Osco 2076-MK	1	Hardware Kit [Exhaust Elbow Bolts]

Additional Details:

• Fits: Most 140hp 3.0L (181 CID)

Use With:

• 18-1901: Manifold
• 18-2875-1: Exhaust Elbow Gasket

Interchanges/Replaces

GLM

• 51340

Mallory

• 9-40611

OMC Stern Drive

• 0740120
• 3850799
• 910380
• 916096
• 987784

Osco

• 188
• 9863T

Volvo Penta

• 3850799

Use With:

• 18-1901: Manifold

Interchanges/Replaces

Barr

• OMC47315055

GLM

• 34700

OMC Stern Drive

• 315055

Use With:

• 18-1901: Manifold

Interchanges/Replaces

Barr

• OMC47311121

GLM

• 33330

OMC Stern Drive

• 311121

Use With:

• 18-1901: Manifold

Interchanges/Replaces

Barr

• OMC47315055

GLM

• 34700

OMC Stern Drive

• 315055

Use With:

• 18-1901: Manifold

Interchanges/Replaces

Barr

• OMC47311121

GLM

• 33330

OMC Stern Drive

• 311121