Best plugs????
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I'm using NGK BR6FS plugs in my Mercury HP525SC motors. I had problems with the factory plugs fouling. I think these NGK's are a little less than 1 heat range hotter. I was nervous going with the hotter plug. However, I have used them for about 8 years now without problems.
I'm not convinced the plugs I use are the absolute best for my application. I'd love to hear what other folks with 525SC motors have experienced.
I'm not convinced the plugs I use are the absolute best for my application. I'd love to hear what other folks with 525SC motors have experienced.