4HP mercury parts identification

[colsan]

I'm looking at a 4 hp mercury top end only (no leg so no model number) on ebay, I've found out it has a switch box thunder bolt 2, part number 247 7483. Any ideas what model 4hp merc this is off?

I have contacted the seller again, the switch box s/n is 339-6222A8, the same as mine, not as mentioned as above. It is a 1978 gnat ML

thanks anyway.

identification solved