Mercury 50-31976 Delco Remy 1113517 Starter Motor No Pinion Gear 1000E 650E 850E 28hp but that was pretty normal

but that was pretty normal on all of them I have seen because you still need sealant around the edges of this for installation

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I'm not exactly sure what this came off of

Basically this would have been found on MerCruiser Gen I Transom assemblies 1983-1990

Mercury 50-31976 Delco Remy 1113517 Starter Motor No Pinion Gear 1000E 650E 850E 28hp but that was pretty normalPart Number(s) Included Mercury 50 31976 Starter Motor Assembly Delco Remy 1113517 (No Pinion Gear unfortunately) Typically would have accepted a 10 tooth Pinion. The part number for this pinion is 32406 and is usually available on eBay or just swap from your existing starter. General Application Compatibility Mercury 1000E (6cyl) [SN 1464949 thru 1758688] 1962 1964 Mercury 650E (4cyl) [SN 1542745 thru 1761648] 1963 1964 Mercury 650S (4cyl) [SN