What engine / Drive number do you have? 165, 120, 140, or other?
I ask do to there's a suggested difference in ensuring the right part number (34127A1) to start was mentioned correctly is all as noted in the two part numbers referenced in the following parts guide item numbers 85 for example,
https://www.mercruiserparts.com/bam/subassembly/30826/1574/80
Sierra 18-6014
A Zinc Anode Should work though.
Sierra high-quality engine parts are designed to meet OEM specifications. For applications where extra clearance is required for high rake propellers...,
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Take note the number with no "A" at the end (18-6014) is for the high performance zinc anode...Different drive design.