A guide to Mercury Marine and Mercury Racing 2.5 blocks and a few 2.0 and 2.4 Liters, too. The "double letters" are stamped on the port-side edge where the block halves meet, upper 1/3rd of the powerhead: EE KK SS PP LL FF NN
Mercury V6 2-stroke Block Identification Chart
Updated: Sep 21, 2024
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