[Badger2008]

1973 Evinrude Flywheel nut? V4 85 HP Anyone know the size? Non of my sockets fit it.

[Vic.S]

Dunno but its unlikely to be anything other than an inch AF size.

Measure accurately across the flats and that should be the size.

THIS TABLE gives spanner sizes against the AF dimension.

That should enable you to determine which size you'll have to buy!

[F_R]

If you are using good old patriotic US of A sockets, it should be 1-5/16 inches.