Mercury Mariner 745-4973 745-6614A3 Piston Connecting Rod Assembly 65-70hp 3cyl U-bolts Should work with any other

Should work with any other Rochester 4 Barrel Quadrajet or Holley Carburetors: MerCruiser

6-5/8" Center to center between the drill holes

Would have been found on OMC Cobra Sterndrive 800 V6 & V8 lower unit gearcases 1986-1993

Part 311277 appears to be broken but come with this listing

OMC 323664 / 0323664 Clutch Dog Shifter(1978-1981)

Mercury Mariner 745-4973 745-6614A3 Piston Connecting Rod Assembly 65-70hp 3cyl U-bolts Should work with any otherPart Number(s) Included 745 6614A3 Piston & Pin Assembly (casting 745 4973) STANDARD SIZE PISTON Superseded Equivalent Related P N: 745 4891A2 > 745 5218A3 > 745 6614A3 > 745 7657A3 > 776 8869A3 > 774 9137A12 622 4850A3 Connecting Rod & Cap Assembly (casting 622 3665) Superseded Equivalent Related P N: 622 3666A4 > 622 3666A10 > 622 4850A4 > 622 4850A3 > 622 3666A10 > 622 4850A4 > 624 8101A3 31 62596A1 Crankpin Bearing Assembly General Application