18-4628 - Piston 3.5 inch plus 0.030 oversize .2704-821896A4.03

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Sierra Marine

18-4628 .030 Piston Mercury 2704-821896A4

Please note: Sierra pistons 18-4626, 18-4627, and 18-4628 are nominally 3.5 inch diameter and oversized as indicated. Some of the Sierra catalog pages have an error indicating that these pistons are 3.375 inch diameter, they are actually 3.5 inch. Thanks.
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Sierra Marine Piston-.030 is equivalent to parts:

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