Used outboard motor flywheel of unknown application (your help is appreciated, please let me know what this fits if you know!).  Overall outer diameter is 8 3/8" the ID of the inner housing is 6 3/16".  Flywheel is in good used condition, all teeth in good shape with little wear and no damage.  I purchased a large inventory of boat parts, this was part of the lot.  If you happen to know the application of this part please let me know and I will add it to the listing.  See my other listings for more boat motor parts, it will take me months to list everything.  See my other listings for more well priced, name brand items.  Free shipping or free pickup in State College, PA.  All boat motor parts are guaranteed to please or your purchase price cheerfully refunded.