Merc 150 blackmax serial Number

[SkeeterDuke15]

I have a Merc black max 150 that has the serial number 5266878. the Cowl has the Merc 150 sticker on it, but also has a 175hp sticker that has been removed from the back of the cowl. ive tried looking up what the serial number says that it is but cant really narrow it down.

im pretty sure its in the 1979 year range and ive found this.

150hp - SN starting 5129480 - 5503246

175hp - starting 5180109 - 5488751

so im kinda stuck... any info would be great. thanks. Nick

i can get pics later this evening if needed

 

[Faztbullet]

!979 first generation 2 liter.......