Riser – Elbow Mounting Kit 

Use With:

• 18-1971: Elbow
• 18-1978: Elbow

Interchanges/Replaces

Barr

• MC20-60426P

GLM

• 53100

Mallory

• 9-40170
• 9-40586

Osco

• 6371-MK

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
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
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