Hello

I'm looking for information about putting Zinc on my 1979 Johnson 140 hp outboard
Model 140TL 79R
The motor was only used in freshwater and has no Zincs
Johnson dealer I contacted had no technical advise for motors this old.
So I contact Martyr and they informed to buy these Zinc
CM39023
CM12009
CM433580
CM4311708.

Maybe a person who has or had a outboard motor around this year and hp could give
me advise on where there Zinc's were located.

Thanks
Christopher