Mercury 7.5 Outboard Powerhead

Description

Older Mercury 2 stroke, 2 cylinder 7-1/2 hp.
Thunderbolt serial 4693665, might be a 1977.
Bought used, no prior history available. Compression test done w.o.t. on a cool day on a rickety stand.
I do not know what else this fits, i only know what this came out of
Sold as is, no returns.