Spark plug question for '67 Merc

[gmarshall43]

I have a 1967, 9.8hp Merc. The manual I have said to put in a champion L4J plug. The place I went to didn't have this plug but cross referenced it to an Auto lite plug. I was told I should have used the champion because it is a better plug. Does any one know if there is there a notable difference between them?<br /><br />Thanks

 

[Mnemonic]

Re: Spark plug question for '67 Merc

I always say go with what the manufacturer recommends, but even I use NGK plugs instead of Champions... <br /><br />I'm sure they will claim they make them somehow differently than another brand to do something better (Better spark, fouling prevention) but it might be BS...

 

[Laddies]

Re: Spark plug question for '67 Merc

As long as the heat range is the same it should run fine, we all have favorite brands of parts and it doesn't take a lot to get a disagrement going, but I would run what you have and if you don't get good service, then I would change them--Bob