On July 26th, at the Stock Outboard Nationals in Grass Lake, Michigan, the Stock Outboard Racing Commission (SORC) adopted the following rule to be added into our inspection manual which was made effective immediately.
"The restrictor plate used in the Yamato engine classes (25SSR & 20SSH) shall have a maximum thickness dimension of .065" without chamfer. All edges of this plate must be 90 degrees."
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Stock Outboard Chairman