Key Features:

• 1 Piece design

Use With:

• 18-1975-1: Riser With Exhaust Tube
• 18-1204-1: Exhaust Manifold Mounting Gasket

Interchanges/Replaces

Barr

• MC 1 99798

GLM

• 51210

Marine Power

• 600333

Mercruiser Stern Drive

• 860235A04
• 99798A16
• 99798A3
• 99798A9

Osco

• 9798

Use With:

• 18-1950-1: Manifold
• 18-1951-1: Manifold
• 18-1958-1: Manifold
• 18-1960-1: Manifold
• 18-1962-1: Manifold
• 18-8512: Exhaust Manifold Mounting Kit
• 18-1954-1: Manifold
• 18-1955-1: Manifold
• 18-1956-3: Manifold
• 18-2832-1: Manifold End Cap Gasket

Interchanges/Replaces

Barr

• 160252

GLM

• 51010

Mallory

• 9-40541

Mercruiser Stern Drive

• 52999
• 60252
• 60252A2

Osco

• 60252

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:

• Application: V-8 inboard applications only

Use With:

• 18-1950-1: Manifold
• 18-1951-1: Manifold
• 18-1954-1: Manifold
• 18-1955-1: Manifold
• 18-1958-1: Manifold
• 18-1960-1: Manifold
• 18-1962-1: Manifold
• 18-2833: Exhaust Elbow Gasket
• 18-4362: Exhaust Elbow Mounting Package
• 18-1906: Manifold Spacer
• 18-4008: Block Off Plate
• 18-8514: Exhaust Elbow Mounting Kit
• 18-8554: Exhaust Elbow Mounting Kit
• 18-1956-3: Manifold

Interchanges/Replaces

Barr

• MC-20-76771

GLM

• 51190

Mallory

• 9-40556

Mercruiser Stern Drive

• 53779A1
• 53779A2
• 60427A2
• 76771A2
• 76771A3

Osco

• 6771

Additional Details:

• Fits: MCM 120/2.5L & 140/3.0L (1983-1995)

Use With:

• 18-1954-1: Manifold
• 18-1955-1: Manifold
• 18-1956-3: Manifold

Interchanges/Replaces

Barr

• MC472796429

GLM

• 33570

Mallory

• 9-61419

Mercruiser Stern Drive

• 27-96429

OMC Stern Drive

• 912164

Osco

• MO4-GH