Sierra Exhaust Boot - SIE-18-2748

Sierra 18-2748 MerCruiser 4" Upper Exhaust Boot

Sierra high-quality engine parts are designed to meet OEM specifications. For use on MerCruiser Stern Drive engines.

Features:

Upper Tube: 4"

Fits MCM 120, 140 & GM V-6 & V-8 engines

Use with: 18-1975-1 Riser with Exhaust Tube

Interchangeable with:

GLM

89120

Mallory

9-72805

MerCruiser Stern Drive

32-44348T

32-44348001

32-44348

Frequently Asked Questions

• What is the Sierra 18-2748 MerCruiser 4" Upper Exhaust Boot used for? The Sierra 18-2748 MerCruiser 4" Upper Exhaust Boot is a replacement exhaust boot for MerCruiser Stern Drive engines. It has a 4-inch upper tube and is designed for MCM 120, 140, and GM V-6 and V-8 engines.
• Which MerCruiser engines fit the Sierra 18-2748 Upper Exhaust Boot? The Sierra 18-2748 fits MCM 120 and 140 engines, as well as GM V-6 and V-8 engines used with MerCruiser Stern Drive applications. Verify your engine application before purchasing to confirm compatibility.
• What is the upper tube size of the Sierra 18-2748 exhaust boot? The Sierra 18-2748 has a 4-inch upper tube. This specification identifies the upper tube size for the MerCruiser Stern Drive exhaust boot.
• What riser should be used with the Sierra 18-2748 Upper Exhaust Boot? The Sierra 18-2748 Upper Exhaust Boot is specified for use with the Sierra 18-1975-1 Riser with Exhaust Tube. Confirm that this is the appropriate riser for your particular MerCruiser application before installation.
• What part numbers are interchangeable with the Sierra 18-2748? The Sierra 18-2748 is interchangeable with GLM 89120, Mallory 9-72805, and MerCruiser Stern Drive part numbers 32-44348T, 32-44348001, and 32-44348. Verify your existing part number or engine application before selecting this exhaust boot.