This is the rear flywheel inspection cover/ ring guard for an OMC 400 or 800 unit
I am pretty sure that this type was used from the mid 70's up until the mid 80's
Top Cowl Cover: 101-1024A5
This particular combination of inlet & outlet fittings was found on the following models: OMC Stringer GM V6 3
as this will not work with most 1970's & beyond 120hp & 140hp setups)
Mercury 7.5hp 75 9.8hp 110 1970 Outboard Prop Propeller 48-47922 9X9 2 Blade Blowers & Vents This is the rear flywheelThis is From a 1970 Kiekhaefer Mercury 7. 5Hp 75 2 cylinder 2 Stroke (serial # 2866420) Item Condition: Good Condition Please Inspect Pictures for condition Part#'s Prop: 48 47922A1, 48 47922 9 48 47922A10, 9PA1 Prop Nut: 11 46355, 11 34933, 18 3721 9 Splined Spacer: 23 65439, 23 27024 Other Related Models: Mercury 7. 5hp , Mercury 9. 8hp 2529895 THRU 3274632 1969, 1970, 1971 models Years: 1969, 1970, 1971, 1972, 1973 7. 5hp, 75 9. 8hp, 110 Yours