Originally Posted by
OnTRAK
From the second picture you posted, the engine appears to have the pre 1984 2-piece cylinder heads. If that's the case, it would be a rectifier only motor. The original Mercury part # for that rectifier would be A-62351A1. Mercury used that rectifier on a lot of late '70's to late '80's 2.0 & 2.4 motors. There are updated part #'s superseding the above # that will include 62351 in the #. Those rectifiers will also work on your motor. Check the build date of the motor located on the port side of the motor where the 2 block halves meet near the base of the # 2 cylinder to help identify it. Posting a picture of the back of the motor like 90 5.0 stated will also help identify it. Also the serial # for the actual power head you have should be located on a welch plug (freeze plug looking item) on the top rear of the block.