Additional Details:

• For: Mercruiser GM V-6 229 & 262 cu. in. (models 185 & 205)
• For: GM Small Block V-8 305-350 cu. in. (models 200, 228, 230, 260 & 898)
• For: GM Big Block V-8 454 cu. in. (models 330, 340 & 7.4L)

Use With:

• 18-1974-1: Elbow
• 18-1970-2: Riser Elbow

Interchanges/Replaces

GLM

• 53300

Mallory

• 9-40580

Osco

• 8503A-MK

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0897	Barr MC 20 99208 MC47-27-41813 GLM 30240 Mallory 9-61413 Mercruiser Stern Drive 27-41813 27-860233 27-863724 Osco 8503-GR	1	Exhaust Elbow Gasket		N/A
NSS	Mercruiser Stern Drive 11-49838	4	Nut	No Image	N/A
NSS	Mercruiser Stern Drive 13-35048	4	Lockwasher	No Image	N/A
NSS	Mercruiser Stern Drive 16-49545	4	Stud	No Image	N/A

Key Features:

• Comes with 18-0897 gasket and brass plugs

Additional Details:

• Fits: V-6 & V-8 applications 0° (3" O.D. Riser)

Use With:

• 18-0672: Exhaust Elbow Gasket
• 18-0897: Exhaust Elbow Gasket
• 18-2849-1: Exhaust Elbow Gasket
• 18-8529: Exhaust Elbow Mounting Kit
• 18-1953-2: Manifold
• 18-8554: Exhaust Elbow Mounting Kit
• 18-1957-2: Manifold

Interchanges/Replaces

Barr

• MC-20-98502

GLM

• 51192

Mallory

• 9-40554

Mercruiser Stern Drive

• 98502A2

Osco

• 8502

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0897	Barr MC 20 99208 MC47-27-41813 GLM 30240 Mallory 9-61413 Mercruiser Stern Drive 27-41813 27-860233 27-863724 Osco 8503-GR	1	Exhaust Elbow Gasket		N/A