0320680 BRP Air Silencer Cover | Genuine Used Part

🔧 Product Description

Genuine Used OMC Evinrude Johnson Air Silencer Cover - Part Number: 0320680

A genuine pre-owned OMC, Evinrude and Johnson carburettor air-silencer cover for selected twin-cylinder outboards.

OEM catalogues identify 0320680 as an early air-silencer or carburettor air-box cover.

The cover attaches to the matching air-silencer base in front of the carburettors. It reduces induction noise, protects the carburettor openings from loose debris and helps maintain the original intake arrangement.

⚙️ Key Features

• Genuine OMC, Evinrude or Johnson used air-silencer cover
• Correct OEM part number 0320680
• Common unprefixed number 320680
• Carburettor air-box cover
• Used with matching air-silencer base 0320678 / 0322088
• Moulded marine intake component
• Obsolete original component commonly sourced used

🚤 Compatibility

Commonly used on selected

• Evinrude 40HP twin-cylinder outboards
• Johnson 40HP twin-cylinder outboards
• Evinrude and Johnson 50HP engines
• Evinrude and Johnson 55HP engines
• Selected 60HP twin-cylinder outboards
• Carburetted two-stroke engines using air-silencer base 0320678 or 0322088

Representative application period

• Approximately 1976-1984
• Verified used-part interchange is commonly listed for 40HP-60HP twin-cylinder engine families from the late 1970s and early 1980s

Important fitment note

• Confirm the complete engine model number.
• Several different air-silencer assemblies were used within the 40HP-60HP range.
• Match the cover to the base, gasket, carburettor spacing and choke-linkage clearance.
• Cover screws, gasket, base and intake hoses are included only when shown or described.

🔌 Function

The air-silencer cover encloses the front of the carburettors and works with the base to form the original induction chamber.

It helps

• Reduce carburettor induction noise
• Prevent loose objects from entering the carburettor throats
• Shield the intake from direct spray and contamination
• Retain hoses and linkage outside the intake openings
• Preserve the intended intake-chamber volume

⚠️ Common Signs of Failure

• Cover is cracked
• Screw holes are enlarged or broken
• Cover is warped
• Gasket surface is damaged
• Cover does not sit flat against the base
• Choke or throttle linkage rubs the cover
• Air-box screws repeatedly loosen
• Internal surfaces are contaminated with degraded fuel or oil residue

🛠️ Service Notes

Recommended checks before installation

• Compare the moulded shape and part number
• Inspect all screw holes
• Check the cover for hidden cracks
• Inspect the matching base
• Replace the air-box-cover gasket
• Confirm that choke and throttle linkages move freely
• Check that no hoses are pinched
• Tighten fasteners evenly without cracking the moulding
• Inspect the carburettor throats for debris before fitting the cover

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 0320680
• 320680
• 0388140
• 388140
• 0322089
• 322089

OEM / Related Numbers

• 0320678 - Earlier matching air-silencer base
• 0322088 - Later matching air-silencer base
• 0320679 - Air-box-cover gasket
• 0321471 - Original cover-to-base screw
• 0334884 - Later related screw reference
• OEM Description: Cover, Air Silencer
• Alternate Description: Carburettor Air-Box Cover

Aftermarket / Verified Equivalents

• No aftermarket equivalent

Service alternatives

• Genuine used OMC cover 0320680
• Genuine used or new-old-stock cover 0388140
• Genuine used or new-old-stock cover 0322089
• Complete used air-silencer assemblies containing the matching cover and base

Important cross-reference note

• 0320680, 0388140 and 0322089 belong to the same cover-replacement family.
• Confirm the cover profile, screw pattern and matching base before installation.
• A later cover should not be installed if the base, gasket or intake-clearance arrangement differs.

📦 Condition

• Genuine OMC Evinrude Johnson used part
• Pre-owned moulded intake component
• Cosmetic marks, fading, oil residue and surface scratches may be present
• Inspect mounting holes, edges and sealing surfaces before installation
• Supplied components are limited to those shown or described
• Supplied in protective or equivalent packaging