The Buckshot Racing #77 Stainless Steel Outboard Cowl Louvers are a proven cooling upgrade designed to improve airflow and reduce under-cowl engine temperatures on high-performance Mercury outboards.
 
During real-world testing, increased airflow through the cowl reduced engine compartment temperatures by an average of approximately 10°F, helping improve power consistency, reduce heat soak, and extend powerhead life during hard operation.
 
High-performance two-stroke Mercury engines generate substantial heat inside the engine cowl, especially during extended idle time, hot restarts, drag racing, lake racing, or high-RPM operation. Trapped heat can raise intake air temperatures and increase stress on electrical, fuel, and ignition components.
 
Adding additional ventilation allows hot air to escape while improving fresh airflow into the engine compartment.
 
The Buckshot Racing #77 louvers provide additional breathing similar to the factory vented cowl designs used on legendary Mercury high-performance models including the Mercury Bridgeport, XR2, XR4, 300 Drag, and S3000 Racing outboards.
 
Compared to non-vented stock cowlings, improved airflow helps stabilize under-cowl temperatures while giving the outboard a more aggressive Mercury Racing appearance.
Manufactured from durable stainless steel, these racing louvers are corrosion resistant and designed to withstand harsh freshwater and saltwater marine environments.
 
The low-profile design allows installation on most relatively flat outboard cowl surfaces requiring approximately a 3.25-inch x 9.75-inch mounting area, with an overall recommended installation area of roughly 3.5 inches x 10 inches.
 
These louvers can be mounted on fiberglass or composite outboard cowlings and are commonly used on Mercury 2.0L, 2.4L, 2.5L, Bridgeport, XR-series, Offshore, Drag, and Mercury Racing applications where additional cooling airflow is desired.
 
Whether you're rigging a Mercury drag motor, restoring a Bridgeport cowl, building a lake-race setup, or simply improving cooling efficiency on a performance outboard, the Buckshot Racing #77 Stainless Steel Cowl Louvers provide a clean, functional airflow upgrade inspired by classic Mercury Racing hardware.
 
Set of two (2) 2 Outboard Cowl Louvers, Stainless Steel