Sierra / Mallory

Additional Details:

• Upper Tube: 4" or 101.6mm
• Fits: MCM 120, 140 & GM V-6 & V-8 engines

Use With:

• 18-1975-1: Riser With Exhaust Tube

Interchanges/Replaces

GLM

• 89120

Mallory

• 9-72805

Mercruiser Stern Drive

• 32-44348
• 32-44348001
• 32-44348T

Interchanges/Replaces

GLM

• 89220

Mallory

• 9-72806

OMC Stern Drive

• 912374

Additional Details:

• For: Mercury 15-25 Hp 2 cyl.

Interchanges/Replaces

Mercury Marine

• 27-414992
• 27-414993
• 27-414994
• 27-414995
• 27-892157

Mercury Race Outboard

• 27-414994

Additional Details:

• Fits: MCM 3.7L engines with aluminum exhaust manifolds (1985-1989)

Use With:

• 18-8530: Exhaust Elbow Mounting Kit
• 18-1937: Elbow

Interchanges/Replaces

GLM

• 32470

Mallory

• 9-61412

Mercruiser Stern Drive

• 27-18272
• 27-97863

Osco

• 8561-G

Use With:

• 18-1911: Manifold End Plate
• 18-1948: Elbow

Interchanges/Replaces

Mallory

• 9-65301

Osco

• 121

Use With:

• 18-1925: Manifold
• 18-1926: Manifold
• 18-1929: Manifold
• 18-1933: Manifold
• 18-1916: Riser
• 18-1917: Block Off Manifold Plate
• 18-1927: Riser

Interchanges/Replaces

Barr

• CR 47 C 96108

Crusader

• 96108

Mallory

• 9-65400

Osco

• 6108

Interchanges/Replaces

Barr

• CR 47 C 96562

Crusader

• 96562

Mallory

• 9-65401

Osco

• 6562

Use With:

• 18-1938: Riser
• 18-1984: Manifold Spacer

Interchanges/Replaces

Barr

• CR 47 C 98127

Crusader

• 98127

GLM

• 36840

Mallory

• 9-65402

Osco

• 9015-G

Additional Details:

• For: Standard cooling, restrictor gasket
• Fits: 1981-1997 GM V-6 & V-8 Engines with center rise outlet exhaust manifold

Use With:

• 18-1908: Manifold Riser Spacer
• 18-1974-1: Elbow
• 18-8556: Exhaust Elbow Mounting Kit
• 18-1952-1: Manifold
• 18-1953-2: Manifold
• 18-1958-1: Manifold
• 18-1962-1: Manifold
• 18-1985: Manifold Spacer
• 18-1976-2: Manifold Elbow
• 18-1957-2: Manifold
• 18-1970-2: Riser Elbow

Interchanges/Replaces

Barr

• MC 20 99208
• MC47-27-41813

GLM

• 30240

Mallory

• 9-61413

Mercruiser Stern Drive

• 27-41813
• 27-860233
• 27-863724

Osco

• 8503-GR

Additional Details:

• Fits: MIE 470

Interchanges/Replaces

Barr

• MC47-27-92720

GLM

• 32630

Mallory

• 9-61415

Mercruiser Stern Drive

• 27-92720

Additional Details:

• Fits: MCM 120 (1993 & newer), 140/3.0L, 470, 165 in-line 6 cyl., GM V-8 small block (1982 & older)
• Fits: Ford V-8 engines

Use With:

• 18-1971: Elbow
• 18-1972: Elbow
• 18-1978: Elbow
• 18-1975-1: Riser With Exhaust Tube

Interchanges/Replaces

Barr

• MC472799777

GLM

• 31520

Mallory

• 9-61407

Mercruiser Stern Drive

• 27-52076
• 27-99777
• 27-997771
• 27-997772
• 27-99777B2

Osco

• 52076

Additional Details:

• For: Closed cooling
• Fits: GM V-6 & V-8 with center rise outlet exhaust manifold

Use With:

• 18-1908: Manifold Riser Spacer
• 18-1974-1: Elbow
• 18-1952-1: Manifold
• 18-1953-2: Manifold
• 18-1976-2: Manifold Elbow
• 18-1957-2: Manifold
• 18-1970-2: Riser Elbow

Interchanges/Replaces

Barr

• MC 20 87918
• MC-47-27-41811

GLM

• 30220

Mallory

• 9-61422

Mercruiser Stern Drive

• 27-41811
• 27-860231
• 27-863725
• 27-8637251

Osco

• 8503-GB

Interchanges/Replaces

OMC Stern Drive

• 910113

Use With:

• 18-8535: Exhaust Elbow Mounting Kit (Blocked)
• 18-1999: Manifold Elbow
• 18-1939: Riser
• 18-1907: Riser
• 18-1898: Manifold

Interchanges/Replaces

Barr

• 01-0107

GLM

• 36830

Mallory

• 9-65501

Osco

• 992-G

Additional Details:

• Fits: MCM 120

Use With:

• 18-1973: Elbow
• 18-1975-1: Riser With Exhaust Tube

Interchanges/Replaces

Barr

• MC472739915

GLM

• 31410

Mallory

• 9-61423

Mercruiser Stern Drive

• 27-39915

Osco

• 5538-G

Exhaust Elbow Gasket
Replaces: Mercury Marine 27-18272
For: 3.7L w/aluminum manifolds 1985-89
Our outdrive mounting gaskets are more tear resistant than the OEM and other aftermarket competitors and feature our exclusive “anti-stick” coating for easy removal the next time they need replaced.

Key Features:

• OMC GM Small Block V8 305-350 cu. in. (1979-1989) & mult application for Ford & GM risers

Use With:

• 18-1921: Manifold Elbow

Interchanges/Replaces

Mallory

• 9-40670

Osco

• 9863-MK

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0943-2	Barr OMC 47 909786 GLM 33810 Mallory 9-61452 OMC Inboard 909786 OMC Stern Drive 351325 3850496 909786 913783 Osco 9863-G Volvo Penta 3850496 3863191	1	Exhaust Elbow Gasket		N/A

Key Features:

• OMC/Volvo GM Small Block V8 305-350 cu.in.

Use With:

• 18-1909-1: Riser

Interchanges/Replaces

Barr

• CM 20 6674J P

Mallory

• 9-40672

Osco

• 50456-MK

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0943-2	Barr OMC 47 909786 GLM 33810 Mallory 9-61452 OMC Inboard 909786 OMC Stern Drive 351325 3850496 909786 913783 Osco 9863-G Volvo Penta 3850496 3863191	1	Exhaust Elbow Gasket		N/A
NSS	Mercruiser Stern Drive 13-35048	4	Washer (3/8)	No Image	N/A

Additional Details:

• For: Pleasurecraft Ford Small Block V8 302 and 351 cu.in.

Use With:

• 18-1899: Riser

Interchanges/Replaces

Mallory

• 9-40871

Osco

• 29001-MK

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0677-1	GLM 33500 Mallory 9-65700 Osco M0002 Pleasurecraft RM0002	1	Elbow Gasket		N/A

Key Features:

• Volvo GM Small Block V8 305-350 cu.in.

Additional Details:

• Models: AQ & BB200, 205, 211, 231, 225, 260, 271, 290, 311, 500, 501, 570, 571 & 572

Use With:

• 18-1935-1: Riser

Interchanges/Replaces

Mallory

• 9-40972

Osco

• 56879-MK

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
NSS	Volvo Penta 959796	2	Bolt, Zinc 5/16-18 x 5 1/2 Grade	No Image	N/A
18-4236	GLM 21725 Volvo Penta 941907	4	Washer
18-2971-1	Barr VO47-835908 GLM 35080 Mallory 9-65800 Osco 35908 Volvo Penta 835908 856039 857618	1	Exhaust Manifold Gasket		N/A