1987 mariner 150 WHAT SPARK PLUG QUESTION

[jsaylor]

I have a 1987 Mariner serial 0b117357 150hp My Seloc manual says to use a BUHW, however when I search online it says to use a BU8H (gapless plug) which do I use?

 

[wired247]

Doesnt really matter.

 

[bilge rat jim]

The Merc book says BU8H, but as mentioned, it really doesn't matter- the only difference is the material the electrode is made of.