top of page

Should I run a Mercury Cross-Drilled Reed Plate?

There are some advantages and disadvantages to running a Mercury Racing Cross-Drilled Reed Plates with Carburetors.

The Mercury Racing cross-drilled reed plates are a popular modification for high-performance outboard engines using carburetors. These reed plates were found on the tunnel boat SST-140, and SST-120 motors, as well as the 245 HP Carb 2.5 Liter.

The main advantage is improved air flow: Cross-drilling the reed plates allows air to flow more efficiently into the engine’s cylinders. The drill holes create additional channels for air to enter, reducing turbulence and increasing the velocity of the incoming air.

This results in better combustion efficiency and increased power output. The Mercury Racing Cross-Drilled Reed Plate can add 10-15 HP to your carbureted Mercury V6 -2-stroke outboard.

The main disadvantage is an even fuel curve: The Mercury Racing Cross-Drilled Reed Plate with carburetors comes with potential drawbacks. While cross-drilling can enhance airflow and potentially improve engine performance by allowing for increased fuel-air mixture delivery, it can also introduce inconsistencies in airflow distribution.

This may result in a bad fuel curve and combustion across cylinders, affecting overall engine performance and reliability.

50 views0 comments

Recent Posts

See All


Rated 0 out of 5 stars.
No ratings yet

Add a rating
bottom of page