420-8678-48 Carb Mounting Flange for Ski-Doo Formula III 800 2000

Carb Mounting Flange for Ski-Doo

This carb mounting flange for Ski-Doo seals the carburetor to the engine intake on the 2000 Formula III 800 snowmobile, cross-referencing 420-8678-48.

Overview

This carb mounting flange for Ski-Doo is an intake sealing component built for the 2000 Formula III 800. It holds the carburetor firmly against the engine so the intake tract stays sealed under load and the fuel mixture stays consistent. Anyone servicing the carburetor or chasing a lean-running condition will find this carb mounting flange for Ski-Doo a direct replacement.

Built For Performance

• Seals the carburetor-to-engine joint to stop unmetered air from entering
• Holds steady intake vacuum for predictable jetting
• Resists the heat cycling and vibration of two-stroke operation
• Direct fit for the 800 series engine intake
• Matches the 420-8678-48 reference for easy verification

Fits These Machines

• for Ski-Doo Formula III 800 2000

On-The-Job Use

• Replacing a hardened or cracked flange during carb service
• Sealing the intake after a top-end rebuild
• Fixing a rough idle caused by a vacuum leak
• Refreshing a trail sled ahead of the riding season

Specs At A Glance

Good To Know

Q: How do I know if my flange needs replacing? A: Look for cracks, hardened rubber, or a visible gap where the carburetor meets the engine. A leaking flange often shows up as a rough idle or a lean condition that jetting changes cannot fix.

Q: Is this a genuine Ski-Doo part? A: This is an aftermarket carburetor mounting flange made to fit the listed application, not an original brand component. The 420-8678-48 reference helps confirm it matches your machine.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.