Correct spark plugs for 4HP 1969 MERC 40?

[andreipou]

Hi,
I just got 4 HP MERC 40 that seems to be 1969 judging on Serial # 2678618.
It does not have spark plugs.
Does anybody know what I should use.
Tnx.

 

[Laddies]

Re: Correct spark plugs for 4HP 1969 MERC 40?

L90C Champion